6ES7314-6EH04-0AB0

Siemens CPU 314C-2 PN/DP compact CPU with integrated I/O

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Maker: Siemens
Part no.: 6ES7314-6EH04-0AB0
Serial / rev.: as printed on your unit

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Siemens SIMATIC S7-300 CPU 314C-2 PN/DP: compact CPU with 192 KB work memory, 24 DI/16 DO, 4 AI, 2 AO, 1 Pt100, 4 high-speed counters, MPI/DP and PROFINET with 2-port switch.

Manufacturer: Siemens
Manufacturer part no.: 6ES7314-6EH04-0AB0
Product family: SIMATIC S7-300 PLC Modules
Type: PLC CPU
Lifecycle: Discontinued: product cancellation (Siemens SiePortal), spare part only
OEM successor: Not stated
Technical datasheet: Data sheet

Technical specifications

Manufacturer: Siemens
Manufacturer part no.: 6ES7314-6EH04-0AB0
Type: PLC CPU
Application: PLC controller with integrated I/O
Used with: SIMATIC S7-300 rack (S7-300 backplane bus)
Product type designation: CPU 314C-2 PN/DP
HW functional status: 01
Firmware version: V3.3
Product function / Isochronous mode: Yes; For PROFINET only
Engineering with / Programming package: STEP 7 V5.5 or higher with HSP 191
Supply voltage / Rated value (DC): 24 V
Supply voltage / permissible range, lower limit (DC): 19.2 V
Supply voltage / permissible range, upper limit (DC): 28.8 V
external protection for power supply lines (recommendation): Miniature circuit breaker, type C; min. 2 A; miniature circuit breaker type B, min. 4 A
Mains buffering / Mains/voltage failure stored energy time: 5 ms
Mains buffering / Repeat rate, min.: 1 s
Load voltage L+ / Digital inputs / Rated value (DC): 24 V
Load voltage L+ / Digital inputs / Reverse polarity protection: Yes
Load voltage L+ / Digital outputs / Rated value (DC): 24 V
Load voltage L+ / Digital outputs / Reverse polarity protection: No
Input current / Current consumption (rated value): 850 mA
Input current / Current consumption (in no-load operation), typ.: 190 mA
Input current / Inrush current, typ.: 5 A
Input current / I²t: 0.7 A²·s
Digital inputs / from load voltage L+ (without load), max.: 80 mA
Digital outputs / from load voltage L+, max.: 50 mA
Power loss, typ.: 14 W
Work memory / integrated: 192 kbyte
Work memory / expandable: No
Load memory / Plug-in (MMC): Yes

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Load memory / Plug-in (MMC), max.: 8 Mbyte
Load memory / Data management on MMC (after last programming), min.: 10 a
Backup / present: Yes; Guaranteed by MMC (maintenance-free)
Backup / without battery: Yes; Program and data
CPU processing times / for bit operations, typ.: 0.06 µs
CPU processing times / for word operations, typ.: 0.12 µs
CPU processing times / for fixed point arithmetic, typ.: 0.16 µs
CPU processing times / for floating point arithmetic, typ.: 0.59 µs
CPU-blocks / Number of elements (total): 1 024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used.
DB / Number, max.: 1 024; Number range: 1 to 16000
DB / Size, max.: 64 kbyte
FB / Number, max.: 1 024; Number range: 0 to 7999
FB / Size, max.: 64 kbyte
FC / Number, max.: 1 024; Number range: 0 to 7999
FC / Size, max.: 64 kbyte
OB / Number, max.: see instruction list
OB / Size, max.: 64 kbyte
OB / Number of free cycle OBs: 1; OB 1
OB / Number of time alarm OBs: 1; OB 10
OB / Number of delay alarm OBs: 2; OB 20, 21
OB / Number of cyclic interrupt OBs: 4; OB 32, 33, 34, 35
OB / Number of process alarm OBs: 1; OB 40
OB / Number of DPV1 alarm OBs: 3; OB 55, 56, 57
OB / Number of isochronous mode OBs: 1; OB 61; only for PROFINET
OB / Number of startup OBs: 1; OB 100
OB / Number of asynchronous error OBs: 6; OB 80, 82, 83, 85, 86, 87 (OB83 only for PROFINET IO)
OB / Number of synchronous error OBs: 2; OB 121, 122
Nesting depth / per priority class: 16
Nesting depth / additional within an error OB: 4
S7 counter / Number: 256
S7 counter / Retentivity / adjustable: Yes
S7 counter / Retentivity / preset: Z 0 to Z 7
S7 counter / Counting range / can be set: Yes
S7 counter / Counting range / lower limit: 0
S7 counter / Counting range / upper limit: 999
IEC counter / present: Yes
IEC counter / Type: SFB
IEC counter / Number: Unlimited (limited only by RAM capacity)
S7 timer / Number: 256
S7 timer / Retentivity / adjustable: Yes
S7 timer / Retentivity / preset: No retentivity
S7 timer / Time range / lower limit: 10 ms
S7 timer / Time range / upper limit: 9 990 s
IEC timer / present: Yes
IEC timer / Type: SFB
IEC timer / Number: Unlimited (limited only by RAM capacity)
Retentive data area (incl. timers, counters, flags), max.: 64 kbyte
Flag / Size, max.: 256 byte
Flag / Retentivity available: Yes; MB 0 to MB 255
Flag / Retentivity preset: MB 0 to MB 15
Flag / Number of clock memories: 8; 1 memory byte
Data blocks / Retentivity adjustable: Yes; via non-retain property on DB
Data blocks / Retentivity preset: Yes
Local data / per priority class, max.: 32 kbyte; Max. 2048 bytes per block
I/O address area / Inputs: 2 048 byte
I/O address area / Outputs: 2 048 byte
I/O address area / of which distributed / Inputs: 2 003 byte
I/O address area / of which distributed / Outputs: 2 010 byte
Process image / Inputs: 2 048 byte
Process image / Outputs: 2 048 byte
Process image / Inputs, adjustable: 2 048 byte
Process image / Outputs, adjustable: 2 048 byte
Process image / Inputs, default: 256 byte
Process image / Outputs, default: 256 byte
Subprocess images / Number of subprocess images, max.: 1; With PROFINET IO, the length of the user data is limited to 1600 bytes
Digital channels / Inputs: 16 048
Digital channels / of which central: 1 016
Digital channels / Outputs: 16 096
Digital channels / of which central: 1 008
Analog channels / Inputs: 1 006
Analog channels / of which central: 253
Analog channels / Outputs: 1 007
Analog channels / of which central: 250
Hardware configuration / Number of expansion units, max.: 3
Number of DP masters / integrated: 1
Number of DP masters / via CP: 4
Number of operable FMs and CPs (recommended) / FM: 8
Number of operable FMs and CPs (recommended) / CP, PtP: 8
Number of operable FMs and CPs (recommended) / CP, LAN: 10
Rack / Racks, max.: 4
Rack / Modules per rack, max.: 8; In rack 3 max. 7
Clock / Hardware clock (real-time): Yes
Clock / retentive and synchronizable: Yes
Clock / Backup time: 6 wk; At 40 °C ambient temperature
Clock / Deviation per day, max.: 10 s; Typ.: 2 s
Clock / Behavior of the clock following POWER-ON: Clock continues running after POWER OFF
Clock / Behavior of the clock following expiry of backup period: the clock continues at the time of day it had when power was switched off
Operating hours counter / Number: 1
Operating hours counter / Number/Number range: 0
Operating hours counter / Range of values: 0 to 2^31 hours (when using SFC 101)
Operating hours counter / Granularity: 1 h
Operating hours counter / retentive: Yes; Must be restarted at each restart
Clock synchronization / supported: Yes
Clock synchronization / to MPI, master: Yes
Clock synchronization / on MPI, device: Yes
Clock synchronization / to DP, master: Yes; With DP slave only slave clock
Clock synchronization / on DP, device: Yes
Clock synchronization / in AS, master: Yes
Clock synchronization / in AS, device: Yes
Clock synchronization / on Ethernet via NTP: Yes; As client
Number of digital inputs: 24
Digital inputs / of which inputs usable for technological functions: 16
Digital inputs / integrated channels (DI): 24
Digital inputs / Input characteristic curve in accordance with IEC 61131, type 1: Yes
Number of simultaneously controllable inputs / horizontal installation / up to 40 °C, max.: 24
Number of simultaneously controllable inputs / horizontal installation / up to 60 °C, max.: 12
Number of simultaneously controllable inputs / vertical installation / up to 40 °C, max.: 12
Input voltage / Rated value (DC): 24 V
Input voltage / for signal "0": -3 to +5V
Input voltage / for signal "1": +15 to +30 V
Input current / for signal "1", typ.: 8 mA
Input delay (for rated value of input voltage) / for standard inputs / parameterizable: Yes; 0.1 / 0.3 / 3 / 15 ms (You can reconfigure the input delay of the standard inputs during program runtime. Please note that under certain circumstances your newly set filter time may not be effective until the next filter cycle.)
Input delay (for rated value of input voltage) / for standard inputs / Rated value: 3 ms
Input delay (for rated value of input voltage) / for technological functions / at "0" to "1", max.: 8 µs; Minimum pulse width/minimum pause between pulses at maximum counting frequency
Cable length / shielded, max.: 1 000 m; 50 m for technological functions
Cable length / unshielded, max.: 600 m; for technological functions: No
Cable length / for technological functions / shielded, max.: 50 m; at maximum count frequency
Cable length / for technological functions / unshielded, max.: not allowed
Number of digital outputs: 16
Digital outputs / of which high-speed outputs: 4; Notice: You cannot connect the fast outputs of your CPU in parallel
Digital outputs / integrated channels (DO): 16
Digital outputs / Short-circuit protection: Yes; Clocked electronically
Digital outputs / Response threshold, typ.: 1 A
Digital outputs / Limitation of inductive shutdown voltage to: L+ (-48 V)
Controlling a digital input: Yes
Switching capacity of the outputs / on lamp load, max.: 5 W
Load resistance range / lower limit: 48 Ω
Load resistance range / upper limit: 4 kΩ
Output voltage / for signal "1", min.: L+ (-0.8 V)
Output current / for signal "1" rated value: 500 mA
Output current / for signal "1" permissible range, min.: 5 mA
Output current / for signal "1" permissible range, max.: 0.6 A
Output current / for signal "1" minimum load current: 5 mA
Output current / for signal "0" residual current, max.: 0.5 mA
Parallel switching of two outputs / for uprating: No
Parallel switching of two outputs / for redundant control of a load: Yes
Switching frequency / with resistive load, max.: 100 Hz
Switching frequency / with inductive load, max.: 0.5 Hz
Switching frequency / on lamp load, max.: 100 Hz
Switching frequency / of the pulse outputs, with resistive load, max.: 2.5 kHz
Total current of the outputs (per group) / horizontal installation / up to 40 °C, max.: 3 A
Total current of the outputs (per group) / horizontal installation / up to 60 °C, max.: 2 A
Total current of the outputs (per group) / vertical installation / up to 40 °C, max.: 2 A
Cable length / shielded, max.: 1 000 m
Cable length / unshielded, max.: 600 m
Number of analog inputs: 5
Analog inputs / For voltage/current measurement: 4
Analog inputs / For resistance/resistance thermometer measurement: 1
Analog inputs / integrated channels (AI): 5; 4x current/voltage, 1x resistance
Analog inputs / permissible input voltage for current input (destruction limit), max.: 5 V; Permanent
Analog inputs / permissible input voltage for voltage input (destruction limit), max.: 30 V; Permanent
Analog inputs / permissible input current for voltage input (destruction limit), max.: 0.5 mA; Permanent
Analog inputs / permissible input current for current input (destruction limit), max.: 50 mA; Permanent
Analog inputs / Electrical input frequency, max.: 400 Hz
Analog inputs / No-load voltage for resistance-type transmitter, typ.: 3.3 V
Analog inputs / Constant measurement current for resistance-type transmitter, typ.: 1.25 mA
Analog inputs / Technical unit for temperature measurement adjustable: Yes; Degrees Celsius / degrees Fahrenheit / Kelvin
Input ranges / Voltage: Yes; ±10 V / 100 kΩ; 0 V to 10 V / 100 kΩ
Input ranges / Current: Yes; ±20 mA / 100 Ω; 0 mA to 20 mA / 100 Ω; 4 mA to 20 mA / 100 Ω
Input ranges / Resistance thermometer: Yes; Pt 100 / 10 MΩ
Input ranges / Resistance: Yes; 0 Ω to 600 Ω / 10 MΩ
Input ranges (rated values), voltages / 0 to +10 V: Yes
Input ranges (rated values), voltages / Input resistance (0 to 10 V): 100 kΩ
Input ranges (rated values), currents / 0 to 20 mA: Yes
Input ranges (rated values), currents / Input resistance (0 to 20 mA): 100 Ω
Input ranges (rated values), currents / -20 mA to +20 mA: Yes
Input ranges (rated values), currents / Input resistance (-20 mA to +20 mA): 100 Ω
Input ranges (rated values), currents / 4 mA to 20 mA: Yes
Input ranges (rated values), currents / Input resistance (4 mA to 20 mA): 100 Ω
Input ranges (rated values), resistance thermometer / Pt 100: Yes
Input ranges (rated values), resistance thermometer / Input resistance (Pt 100): 10 MΩ
Input ranges (rated values), resistors / 0 to 600 ohms: Yes
Input ranges (rated values), resistors / Input resistance (0 to 600 ohms): 10 MΩ
Thermocouple (TC) / Temperature compensation / Parameterizable: No
Characteristic linearization / Parameterizable: Yes; by software
Characteristic linearization / for resistance thermometer: Pt 100
Cable length / shielded, max.: 100 m
Analog outputs / integrated channels (AO): 2
Analog outputs / Voltage output, short-circuit protection: Yes
Analog outputs / Voltage output, short-circuit current, max.: 55 mA
Analog outputs / Current output, no-load voltage, max.: 14 V
Output ranges, voltage / 0 to 10 V: Yes
Output ranges, voltage / -10 V to +10 V: Yes
Output ranges, current / 0 to 20 mA: Yes
Output ranges, current / -20 mA to +20 mA: Yes
Output ranges, current / 4 mA to 20 mA: Yes
Connection of actuators / for voltage output two-wire connection: Yes; Without compensation of the line resistances
Connection of actuators / for voltage output four-wire connection: No
Connection of actuators / for current output two-wire connection: Yes
Load impedance (in rated range of output) / with voltage outputs, min.: 1 kΩ
Load impedance (in rated range of output) / with voltage outputs, capacitive load, max.: 0.1 µF
Load impedance (in rated range of output) / with current outputs, max.: 300 Ω
Load impedance (in rated range of output) / with current outputs, inductive load, max.: 0.1 mH
Destruction limits against externally applied voltages and currents / Voltages at the outputs towards MANA: 16 V; Permanent
Destruction limits against externally applied voltages and currents / Current, max.: 50 mA; Permanent
Cable length / shielded, max.: 200 m
Analog value generation for the inputs / Measurement principle: Actual value encryption (successive approximation)
Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.: 12 bit
Integration and conversion time/resolution per channel / Integration time, parameterizable: Yes; 16.6 / 20 ms
Integration and conversion time/resolution per channel / Interference voltage suppression for interference frequency f1 in Hz: 50 / 60 Hz
Integration and conversion time/resolution per channel / Time constant of the input filter: 0.38 ms
Integration and conversion time/resolution per channel / Basic execution time of the module (all channels released): 1 ms
Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.: 12 bit
Integration and conversion time/resolution per channel / Conversion time (per channel): 1 ms
Settling time / for resistive load: 0.6 ms
Settling time / for capacitive load: 1 ms
Settling time / for inductive load: 0.5 ms
Connection of signal encoders / for voltage measurement: Yes
Connection of signal encoders / for current measurement as 2-wire transducer: Yes; with external supply
Connection of signal encoders / for current measurement as 4-wire transducer: Yes
Connection of signal encoders / for resistance measurement with two-wire connection: Yes; Without compensation of the line resistances
Connection of signal encoders / for resistance measurement with three-wire connection: No
Connection of signal encoders / for resistance measurement with four-wire connection: No
Connectable encoders / 2-wire sensor: Yes
Connectable encoders / permissible quiescent current (2-wire sensor), max.: 1.5 mA
Errors/accuracies / Temperature error (relative to input range), (+/-): 0.006 %/K
Errors/accuracies / Crosstalk between the inputs, min.: 60 dB
Errors/accuracies / Repeat accuracy in steady state at 25 °C (relative to input range), (+/-): 0.06 %
Errors/accuracies / Output ripple (relative to output range, bandwidth 0 to 50 kHz), (+/-): 0.1 %
Errors/accuracies / Linearity error (relative to output range), (+/-): 0.15 %
Errors/accuracies / Temperature error (relative to output range), (+/-): 0.01 %/K
Errors/accuracies / Crosstalk between the outputs, min.: 60 dB
Errors/accuracies / Repeat accuracy in steady state at 25 °C (relative to output range), (+/-): 0.06 %
Operational error limit in overall temperature range / Voltage, relative to input range, (+/-): 1 %
Operational error limit in overall temperature range / Current, relative to input range, (+/-): 1 %
Operational error limit in overall temperature range / Resistance, relative to input range, (+/-): 1 %
Operational error limit in overall temperature range / Voltage, relative to output range, (+/-): 1 %
Operational error limit in overall temperature range / Current, relative to output range, (+/-): 1 %
Basic error limit (operational limit at 25 °C) / Voltage, relative to input range, (+/-): 0.8 %; Linearity error ±0.06 %
Basic error limit (operational limit at 25 °C) / Current, relative to input range, (+/-): 0.8 %; Linearity error ±0.06 %
Basic error limit (operational limit at 25 °C) / Resistance, relative to input range, (+/-): 0.8 %; Linearity error ±0.2 %
Basic error limit (operational limit at 25 °C) / Resistance thermometer, relative to input range, (+/-): 0.8 %
Basic error limit (operational limit at 25 °C) / Voltage, relative to output range, (+/-): 0.8 %
Basic error limit (operational limit at 25 °C) / Current, relative to output range, (+/-): 0.8 %
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency / Series mode interference (peak value of interference < rated value of input range), min.: 30 dB
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency / Common mode interference, min.: 40 dB
Number of PROFINET interfaces: 1; 2 ports (switch) RJ45
Number of RS 485 interfaces: 1; Combined MPI / PROFIBUS DP
Number of RS 422 interfaces: 0
1. Interface / Interface type: Integrated RS 485 interface
1. Interface / Isolated: Yes
Interface types / RS 485: Yes
Interface types / Output current of the interface, max.: 200 mA
Protocols / MPI: Yes
Protocols / PROFIBUS DP master: Yes
Protocols / PROFIBUS DP device: Yes
Protocols / Point-to-point connection: No
MPI / Transmission rate, max.: 12 Mbit/s
MPI / Services / PG/OP communication: Yes
MPI / Services / Routing: Yes
MPI / Services / Global data communication: Yes
MPI / Services / S7 basic communication: Yes
MPI / Services / S7 communication: Yes
MPI / Services / S7 communication, as client: No; but via CP and loadable FB
MPI / Services / S7 communication, as server: Yes
PROFIBUS DP master / Transmission rate, max.: 12 Mbit/s
PROFIBUS DP master / max. number of DP devices: 124
PROFIBUS DP master / Services / PG/OP communication: Yes
PROFIBUS DP master / Services / Routing: Yes
PROFIBUS DP master / Services / Global data communication: No
PROFIBUS DP master / Services / S7 basic communication: Yes; I blocks only
PROFIBUS DP master / Services / S7 communication: Yes
PROFIBUS DP master / Services / S7 communication, as client: No
PROFIBUS DP master / Services / S7 communication, as server: Yes
PROFIBUS DP master / Services / Equidistance: Yes
PROFIBUS DP master / Services / Isochronous mode: No
PROFIBUS DP master / Services / SYNC/FREEZE: Yes
PROFIBUS DP master / Services / activation/deactivation of DP devices: Yes
PROFIBUS DP master / Services / max. number of DP devices that can be activated/deactivated at the same time: 8
PROFIBUS DP master / Services / Direct data exchange (slave-to-slave communication): Yes; as subscriber
PROFIBUS DP master / Services / DPV1: Yes
PROFIBUS DP master / Address area / Inputs, max.: 2 kbyte
PROFIBUS DP master / Address area / Outputs, max.: 2 kbyte
PROFIBUS DP master / User data per DP device / Inputs, max.: 244 byte
PROFIBUS DP master / User data per DP device / Outputs, max.: 244 byte
PROFIBUS DP device / Transmission rate, max.: 12 Mbit/s
PROFIBUS DP device / automatic baud rate search: Yes; only with passive interface
PROFIBUS DP device / Address area, max.: 32
PROFIBUS DP device / User data per address area, max.: 32 byte
PROFIBUS DP device / Services / PG/OP communication: Yes
PROFIBUS DP device / Services / Routing: Yes; Only with active interface
PROFIBUS DP device / Services / Global data communication: No
PROFIBUS DP device / Services / S7 basic communication: No
PROFIBUS DP device / Services / S7 communication: Yes
PROFIBUS DP device / Services / S7 communication, as client: No
PROFIBUS DP device / Services / S7 communication, as server: Yes; Connection configured on one side only
PROFIBUS DP device / Services / Direct data exchange (slave-to-slave communication): Yes
PROFIBUS DP device / Services / DPV1: No
PROFIBUS DP device / Transfer memory / Inputs: 244 byte
PROFIBUS DP device / Transfer memory / Outputs: 244 byte
2. Interface / Interface type: PROFINET
2. Interface / Isolated: Yes
2. Interface / automatic detection of transmission rate: Yes; 10/100 Mbit/s
2. Interface / Autonegotiation: Yes
2. Interface / Autocrossing: Yes
2. Interface / Change of IP address at runtime, supported: Yes
Interface types / RJ 45 (Ethernet): Yes
Interface types / Number of ports: 2
Interface types / integrated switch: Yes
Protocols / MPI: No
Protocols / PROFINET IO Controller: Yes; Also simultaneously with IO-Device functionality
Protocols / PROFINET IO Device: Yes; Also simultaneously with IO Controller functionality
Protocols / PROFINET CBA: Yes
Protocols / PROFIBUS DP master: No
Protocols / PROFIBUS DP device: No
Protocols / Open IE communication: Yes; Via TCP/IP, ISO on TCP, and UDP
Protocols / Web server: Yes
Protocols / Media redundancy: Yes
PROFINET IO Controller / Transmission rate, max.: 100 Mbit/s
PROFINET IO Controller / Services / PG/OP communication: Yes
PROFINET IO Controller / Services / Routing: Yes
PROFINET IO Controller / Services / S7 communication: Yes; With loadable FBs, max. configurable connections: 10, max. number of instances: 32
PROFINET IO Controller / Services / Isochronous mode: Yes; OB 61
PROFINET IO Controller / Services / IRT: Yes
PROFINET IO Controller / Services / Shared device: Yes
PROFINET IO Controller / Services / Prioritized startup: Yes
PROFINET IO Controller / Services / Number of IO devices with prioritized startup, max.: 32
PROFINET IO Controller / Services / Number of connectable IO Devices, max.: 128
PROFINET IO Controller / Services / Of which IO devices with IRT, max.: 64
PROFINET IO Controller / Services / of which in line, max.: 64
PROFINET IO Controller / Services / Number of IO Devices with IRT and the option "high flexibility": 128
PROFINET IO Controller / Services / of which in line, max.: 61
PROFINET IO Controller / Services / Number of connectable IO Devices for RT, max.: 128
PROFINET IO Controller / Services / of which in line, max.: 128
PROFINET IO Controller / Services / Activation/deactivation of IO Devices: Yes
PROFINET IO Controller / Services / Number of IO Devices that can be simultaneously activated/deactivated, max.: 8
PROFINET IO Controller / Services / IO Devices changing during operation (partner ports), supported: Yes
PROFINET IO Controller / Services / Number of IO Devices per tool, max.: 8
PROFINET IO Controller / Services / Device replacement without swap medium: Yes
PROFINET IO Controller / Services / Send cycles: 250 μs, 500 μs,1 ms; 2 ms, 4 ms (not in the case of IRT with "high flexibility" option)
PROFINET IO Controller / Services / Updating time: 250 µs to 512 ms (depending on the operating mode, see Manual "S7-300 CPU 31xC and CPU 31x, technical Data" for more details)
PROFINET IO Controller / Address area / Inputs, max.: 2 kbyte
PROFINET IO Controller / Address area / Outputs, max.: 2 kbyte
PROFINET IO Controller / Address area / User data consistency, max.: 1 024 byte
PROFINET IO Device / Services / PG/OP communication: Yes
PROFINET IO Device / Services / Routing: Yes
PROFINET IO Device / Services / S7 communication: Yes; With loadable FBs, max. configurable connections: 10, max. number of instances: 32
PROFINET IO Device / Services / Isochronous mode: No
PROFINET IO Device / Services / IRT: Yes
PROFINET IO Device / Services / PROFIenergy: Yes; With SFB 73 / 74 prepared for loadable PROFIenergy standard FB for I- Device
PROFINET IO Device / Services / Shared device: Yes
PROFINET IO Device / Services / Number of IO Controllers with shared device, max.: 2
PROFINET IO Device / Services / Transfer memory / Inputs, max.: 1 440 byte; Per IO Controller with shared device
PROFINET IO Device / Services / Transfer memory / Outputs, max.: 1 440 byte; Per IO Controller with shared device
PROFINET IO Device / Services / Submodules / Number, max.: 64
PROFINET IO Device / Services / Submodules / User data per submodule, max.: 1 024 byte
PROFINET IO Device / PROFINET CBA / acyclic transmission: Yes
PROFINET IO Device / PROFINET CBA / cyclic transmission: Yes
PROFINET IO Device / Open IE communication / Number of connections, max.: 8
PROFINET IO Device / Open IE communication / Local port numbers used at the system end: 0, 20, 21, 23, 25, 80, 102, 135, 161, 443, 8080, 34962, 34963, 34964, 65532, 65533, 65534, 65535
PROFINET IO Device / Open IE communication / Keep-alive function, supported: Yes
Protocols / PROFIsafe: No
Redundancy mode / Media redundancy / Switchover time on line break, typ.: 200 ms; PROFINET MRP
Redundancy mode / Media redundancy / Number of stations in the ring, max.: 50
Open IE communication / TCP/IP: Yes; via integrated PROFINET interface and loadable FBs
Open IE communication / Number of connections, max.: 8
Open IE communication / Data length for connection type 01H, max.: 1 460 byte
Open IE communication / Data length for connection type 11H, max.: 32 768 byte
Open IE communication / several passive connections per port, supported: Yes
Open IE communication / ISO-on-TCP (RFC1006): Yes; via integrated PROFINET interface and loadable FBs
Open IE communication / Number of connections, max.: 8
Open IE communication / Data length, max.: 32 768 byte
Open IE communication / UDP: Yes; via integrated PROFINET interface and loadable FBs
Open IE communication / Number of connections, max.: 8
Open IE communication / Data length, max.: 1 472 byte
Web server / supported: Yes
Web server / User-defined websites: Yes
Web server / Number of HTTP clients: 5
PG/OP communication: Yes
Communication functions / Data record routing: Yes
Global data communication / supported: Yes
Global data communication / Number of GD loops, max.: 8
Global data communication / Number of GD packets, max.: 8
Global data communication / Number of GD packets, transmitter, max.: 8
Global data communication / Number of GD packets, receiver, max.: 8
Global data communication / Size of GD packets, max.: 22 byte
Global data communication / Size of GD packet (of which consistent), max.: 22 byte
S7 basic communication / supported: Yes
S7 basic communication / User data per job, max.: 76 byte
S7 basic communication / User data per job (of which consistent), max.: 76 byte; 76 bytes (with X_SEND or X_RCV); 64 bytes (with X_PUT or X_GET as server)
S7 communication / supported: Yes
S7 communication / as server: Yes
S7 communication / as client: Yes; via integrated PROFINET interface and loadable FB or via CP and loadable FB
S7 communication / User data per job, max.: See online help of STEP 7 (shared parameters of the SFBs/FBs and of the SFCs/FCs of S7 Communication)
S5 compatible communication / supported: Yes; via CP and loadable FC
PROFINET CBA (at set setpoint communication load) / Setpoint for the CPU communication load: 50 %
PROFINET CBA (at set setpoint communication load) / Number of remote interconnection partners: 32
PROFINET CBA (at set setpoint communication load) / number of master/device functions: 30
PROFINET CBA (at set setpoint communication load) / total of all master/device connections: 1 000
PROFINET CBA (at set setpoint communication load) / data length of all incoming master/device connections, max.: 4 000 byte
PROFINET CBA (at set setpoint communication load) / data length of all outgoing master/device connections, max.: 4 000 byte
PROFINET CBA (at set setpoint communication load) / Number of device-internal and PROFIBUS interconnections: 500
PROFINET CBA (at set setpoint communication load) / Data length of device-internal und PROFIBUS interconnections, max.: 4 000 byte
PROFINET CBA (at set setpoint communication load) / Data length per connection, max.: 1 400 byte
PROFINET CBA (at set setpoint communication load) / Remote interconnections with cyclic transmission / Transmission frequency: Transmission interval, min.: 10 ms
PROFINET CBA (at set setpoint communication load) / Remote interconnections with cyclic transmission / Number of incoming interconnections: 200
PROFINET CBA (at set setpoint communication load) / Remote interconnections with cyclic transmission / Number of outgoing interconnections: 200
PROFINET CBA (at set setpoint communication load) / Remote interconnections with cyclic transmission / Data length of all incoming interconnections, max.: 2 000 byte
PROFINET CBA (at set setpoint communication load) / Remote interconnections with cyclic transmission / Data length of all outgoing interconnections, max.: 2 000 byte
PROFINET CBA (at set setpoint communication load) / Remote interconnections with cyclic transmission / Data length per connection, max.: 450 byte
PROFINET CBA (at set setpoint communication load) / HMI variables via PROFINET (acyclic) / Number of stations that can log on for HMI variables (PN OPC/iMap): 3; 2x PN OPC/1x iMap
PROFINET CBA (at set setpoint communication load) / HMI variables via PROFINET (acyclic) / HMI variable updating: 500 ms
PROFINET CBA (at set setpoint communication load) / HMI variables via PROFINET (acyclic) / Number of HMI variables: 200
PROFINET CBA (at set setpoint communication load) / HMI variables via PROFINET (acyclic) / Data length of all HMI variables, max.: 2 000 byte
PROFINET CBA (at set setpoint communication load) / PROFIBUS proxy functionality / supported: Yes
PROFINET CBA (at set setpoint communication load) / PROFIBUS proxy functionality / Number of linked PROFIBUS devices: 16
PROFINET CBA (at set setpoint communication load) / PROFIBUS proxy functionality / Data length per connection, max.: 240 byte; Slave-dependent
Number of connections / overall: 12
Number of connections / usable for PG communication: 11
Number of connections / reserved for PG communication: 1
Number of connections / adjustable for PG communication, min.: 1
Number of connections / adjustable for PG communication, max.: 11
Number of connections / usable for OP communication: 11
Number of connections / reserved for OP communication: 1
Number of connections / adjustable for OP communication, min.: 1
Number of connections / adjustable for OP communication, max.: 11
Number of connections / usable for S7 basic communication: 8
Number of connections / reserved for S7 basic communication: 0
Number of connections / adjustable for S7 basic communication, min.: 0
Number of connections / adjustable for S7 basic communication, max.: 8
Number of connections / usable for S7 communication: 10
Number of connections / reserved for S7 communication: 0
Number of connections / adjustable for S7 communication, min.: 0
Number of connections / adjustable for S7 communication, max.: 10
Number of connections / total number of instances, max.: 32
Number of connections / usable for routing: X1 as MPI: max. 10; X1 as DP master: max. 24; X1 as DP slave (active): max. 14; X2 as PROFINET: 24 max.
S7 message functions / Number of login stations for message functions, max.: 12; Depending on the configured connections for PG/OP and S7 basic communication
S7 message functions / Process diagnostic messages: Yes
S7 message functions / simultaneously active Alarm_S blocks, max.: 300
Test commissioning functions / Status block: Yes; Up to 2 simultaneously
Test commissioning functions / Single step: Yes
Test commissioning functions / Number of breakpoints: 4
Status/control / Status/control variable: Yes
Status/control / Variables: Inputs, outputs, memory bits, DB, times, counters
Status/control / Number of variables, max.: 30
Status/control / of which status variables, max.: 30
Status/control / of which control variables, max.: 14
Forcing / Forcing: Yes
Forcing / Forcing, variables: Inputs, outputs
Forcing / Number of variables, max.: 10
Diagnostic buffer / present: Yes
Diagnostic buffer / Number of entries, max.: 500
Diagnostic buffer / can be set: No
Diagnostic buffer / of which powerfail-proof: 100; Only the last 100 entries are retained
Diagnostic buffer / Number of entries readable in RUN, max.: 499
Diagnostic buffer / can be set: Yes; From 10 to 499
Diagnostic buffer / preset: 10
Service data / Can be read out: Yes
Diagnostics indication LED / Status indicator digital input (green): Yes
Diagnostics indication LED / Status indicator digital output (green): Yes
Counter / Number of counters: 4; See "Technological Functions" manual
Counter / Counting frequency, max.: 60 kHz
Integrated Functions / Frequency measurement: Yes
Integrated Functions / Number of frequency meters: 4; up to 60 kHz (see "Technological Functions" manual)
Integrated Functions / controlled positioning: Yes
integrated function blocks (closed-loop control): Yes; PID controller (see "Technological Functions" manual)
Integrated Functions / PID controller: Yes
Integrated Functions / Number of pulse outputs: 4; Pulse width modulation up to 2.5 kHz (see "Technological Functions" Manual)
Integrated Functions / Limit frequency (pulse): 2.5 kHz
Potential separation digital inputs / Potential separation digital inputs: Yes
Potential separation digital inputs / between the channels: No
Potential separation digital inputs / between the channels and backplane bus: Yes
Potential separation digital outputs / Potential separation digital outputs: Yes
Potential separation digital outputs / between the channels: Yes
Potential separation digital outputs / between the channels, in groups of: 8
Potential separation digital outputs / between the channels and backplane bus: Yes
Potential separation analog inputs / Potential separation analog inputs: Yes; common for analog I/O
Potential separation analog inputs / between the channels: No
Potential separation analog inputs / between the channels and backplane bus: Yes
Potential separation analog outputs / Potential separation analog outputs: Yes; common for analog I/O
Potential separation analog outputs / between the channels: No
Potential separation analog outputs / between the channels and backplane bus: Yes
Isolation tested with: 600 V DC

Technical documents (1)

Siemens data sheet 6ES7314-6EH04-0AB0

Key features

192 KB integrated work memory
Integrated I/O: 24 DI, 16 DO, 4 AI, 2 AO and 1 Pt100 input
4 high-speed counters (60 kHz)
MPI/PROFIBUS DP and PROFINET with 2-port switch
Needs two 40-pole front connectors and a Micro Memory Card
Discontinued by Siemens on 1 October 2025; spare part only

About the Siemens 6ES7314-6EH04-0AB0

The Siemens 6ES7314-6EH04-0AB0 is the CPU 314C-2 PN/DP, a compact S7-300 CPU with its I/O built in. Siemens's data sheet lists 192 KB of work memory, 24 digital inputs and 16 digital outputs, four analog inputs plus one Pt100 input, two analog outputs and four high-speed counters up to 60 kHz, with a combined MPI/PROFIBUS DP interface and a PROFINET interface with a two-port switch. It needs two 40-pole front connectors and a Micro Memory Card, ordered separately. Siemens's data sheet marks it as a spare part. Siemens names no direct successor for the order number; its route forward is migration to the S7-1500.

What is the 6ES7314-6EH04-0AB0 used for?

It runs small machines and cells on its own, because the I/O is on the CPU, and can be extended with S7-300 modules or networked I/O. A failed 314C takes its own I/O down with it.

Lifecycle and successor

Discontinued: product cancellation (Siemens SiePortal), spare part only.

Before you order

What to photograph or confirm so the right unit is quoted.

Check the full order number and the firmware version on the CPU's label, and read the program size from the project if you can: a replacement must match or exceed the work memory. The Micro Memory Card (MMC) holding the program is a separate part; send its order number and size too. The two front connectors carry the field wiring and can usually be moved to the replacement unit.

Alternatives for 6ES7314-6EH04-0AB0

The manufacturer’s named successor and other parts in the same family. None is a drop-in replacement without checking wiring, I/O and configuration for your installation.

Product	Manufacturer	Type	Lifecycle	Relationship	Qty Available	Price	Action
Siemens 6ES7315-2AH14-0AB0CPU 315-2 DP, 256 KB, MPI and PROFIBUS DP	Siemens	PLC CPU	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7315-2EH14-0AB0CPU 315-2 PN/DP, 384 KB, MPI/DP and PROFINET	Siemens	PLC CPU	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7317-2EK14-0AB0CPU 317-2 PN/DP, 1 MB, MPI/DP and PROFINET	Siemens	PLC CPU	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7313-5BG04-0AB0CPU 313C compact CPU with integrated I/O, MPI	Siemens	PLC CPU	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7321-1BL00-0AA0SM 321 digital input, 32 DI, 24 V DC	Siemens	Digital input module	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7322-1BL00-0AA0SM 322 digital output, 32 DO, 24 V DC, 0.5 A	Siemens	Digital output module	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7331-7KF02-0AB0SM 331 analog input, 8 AI, U/I/thermocouple/resistance	Siemens	Analog input module	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7332-5HF00-0AB0SM 332 analog output, 8 AO, voltage/current	Siemens	Analog output module	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6ES7307-1EA01-0AA0PS307 power supply, 120/230 V AC in, 24 V DC 5 A out	Siemens	Power supply	Phase-out announced (Siemens SiePortal)	Same family	On Request	On request	View ›
Siemens 6GK7343-1CX10-0XE0CP 343-1 Lean communications processor, Industrial Ethernet	Siemens	Communications processor	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6GK7343-1EX30-0XE0CP 343-1 communications processor, Industrial Ethernet, PROFINET IO controller	Siemens	Communications processor	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›
Siemens 6GK7342-5DA03-0XE0CP 342-5 communications processor, PROFIBUS DP master/slave	Siemens	Communications processor	Discontinued: product cancellation (Siemens SiePortal), spare part only	Same family	On Request	On request	View ›

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