Siemens 6ES7414-4HM14-0AB0
CPU 414-4H for S7-400H/F/FH, 2.8 MB, MPI/DP, DP and 2 sync interfaces
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- Manufacturer
- Siemens
- Manufacturer part number
- 6ES7414-4HM14-0AB0
- Product family
- SIMATIC S7-400 PLC CPUs, I/O and Function Modules
- Category
- PLCs and I/O › CPU and processor modules
- Technical datasheet
- Data sheet
Specifications
| Attribute | Value |
|---|---|
| Type | Redundant PLC CPU (H-CPU) |
| Manufacturer lifecycle | Discontinued |
| Product type designation | CPU 414-4H |
| HW functional status | 1 |
| Firmware version | V4.5 |
| Engineering with / Programming package | STEP 7 V5.3 SP2 or higher with HW update |
| CiR synchronization time, basic load | 100 ms |
| CiR synchronization time, time per I/O byte | 25 µs |
| Supply voltage / Rated value (DC) | Power supply via system power supply |
| Input current / from backplane bus 5 V DC, typ. | 1.4 A |
| Input current / from backplane bus 5 V DC, max. | 1.7 A |
| Input current / from backplane bus 24 V DC, max. | 150 mA; Per DP interface |
| Input current / from interface 5 V DC, max. | 90 mA; At each DP interface |
| Power loss, typ. | 6 W |
| Storage / Type of memory | RAM |
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| Work memory / integrated | 2.8 Mbyte |
|---|---|
| Work memory / integrated (for program) | 1.4 Mbyte |
| Work memory / integrated (for data) | 1.4 Mbyte |
| Work memory / expandable | No |
| Load memory / expandable FEPROM | Yes |
| Load memory / expandable FEPROM, max. | 64 Mbyte |
| Load memory / integrated RAM, max. | 256 kbyte |
| Load memory / expandable RAM | Yes |
| Load memory / expandable RAM, max. | 64 Mbyte |
| Backup / present | Yes |
| Backup / with battery | Yes; all data |
| Backup / without battery | No |
| Backup battery / Backup current, typ. | 190 µA; Valid up to 40°C |
| Backup battery / Backup current, max. | 660 µA |
| Backup battery / Backup time, max. | Dealt with in the module data manual with the secondary conditions and the factors of influence |
| Backup battery / Feeding of external backup voltage to CPU | 5 V DC to 15 V DC |
| CPU processing times / for bit operations, typ. | 0.045 µs |
| CPU processing times / for word operations, typ. | 0.045 µs |
| CPU processing times / for fixed point arithmetic, typ. | 0.045 µs |
| CPU processing times / for floating point arithmetic, typ. | 0.135 µs |
| DB / Number, max. | 4 095; Number range: 1 to 4095 |
| DB / Size, max. | 64 kbyte |
| FB / Number, max. | 2 048; Number range: 0 to 2047 |
| FB / Size, max. | 64 kbyte |
| FC / Number, max. | 2 048; Number range: 0 to 2047 |
| FC / Size, max. | 64 kbyte |
| OB / Size, max. | 64 kbyte |
| OB / Number of time alarm OBs | 4 |
| OB / Number of delay alarm OBs | 4 |
| OB / Number of cyclic interrupt OBs | 4 |
| OB / Number of process alarm OBs | 4 |
| Nesting depth / per priority class | 24 |
| Nesting depth / additional within an error OB | 1 |
| S7 counter / Number | 2 048 |
| S7 counter / Retentivity / adjustable | Yes |
| S7 counter / Retentivity / preset | Z 0 to Z 7 |
| S7 counter / Counting range / lower limit | 0 |
| S7 counter / Counting range / upper limit | 999 |
| IEC counter / present | Yes |
| IEC counter / Type | SFB |
| S7 timer / Number | 2 048 |
| S7 timer / Retentivity / adjustable | Yes |
| S7 timer / Retentivity / preset | No times retentive |
| 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 |
| Retentive data area (incl. timers, counters, flags), max. | Total working and load memory (with backup battery) |
| Flag / Size, max. | 8 kbyte |
| Flag / Retentivity available | Yes |
| Flag / Retentivity preset | MB 0 to MB 15 |
| Flag / Number of clock memories | 8; in 1 memory byte |
| Local data / adjustable, max. | 16 kbyte |
| Local data / preset | 8 kbyte |
| I/O address area / Inputs | 8 kbyte |
| I/O address area / Outputs | 8 kbyte |
| Process image / Inputs, adjustable | 8 kbyte |
| Process image / Outputs, adjustable | 8 kbyte |
| Process image / Inputs, default | 256 byte |
| Process image / Outputs, default | 256 byte |
| Process image / consistent data, max. | 244 byte |
| Process image / Access to consistent data in process image | Yes |
| Subprocess images / Number of subprocess images, max. | 15 |
| Digital channels / Inputs | 65 536 |
| Digital channels / Inputs / of which central | 65 536 |
| Digital channels / Outputs | 65 536 |
| Digital channels / Outputs / of which central | 65 536 |
| Analog channels / Inputs | 4 096 |
| Analog channels / Inputs / of which central | 4 096 |
| Analog channels / Outputs | 4 096 |
| Analog channels / Outputs / of which central | 4 096 |
| Hardware configuration / Number of expansion units, max. | 21 |
| Hardware configuration / connectable OPs | 31 without message processing, 8 with message processing |
| Hardware configuration / Multicomputing | No |
| Interface modules / Number of connectable IMs (total), max. | 6 |
| Interface modules / Number of connectable IM 460s, max. | 6 |
| Interface modules / Number of connectable IM 463s, max. | 4; Single mode only |
| Number of DP masters / integrated | 2 |
| Number of DP masters / via CP | 10 |
| Number of DP masters / Mixed mode IM + CP permitted | No |
| Number of operable FMs and CPs (recommended) / FM | See manual Automation System S7-400H fault-tolerant systems. Limited by number of slots and number of connections |
| Number of operable FMs and CPs (recommended) / CP, PtP | See manual Automation System S7-400H fault-tolerant systems. Limited by number of slots and number of connections |
| Number of operable FMs and CPs (recommended) / PROFIBUS and Ethernet CPs | 14; Of which max. 10 CP as DP master |
| Slots / required slots | 2 |
| Clock / Hardware clock (real-time) | Yes |
| Clock / retentive and synchronizable | Yes |
| Clock / Resolution | 1 ms |
| Clock / Deviation per day (buffered), max. | 1.7 s; Power off |
| Clock / Deviation per day (unbuffered), max. | 8.6 s; Power on |
| Operating hours counter / Number | 8 |
| Operating hours counter / Number/Number range | 0 to 7 |
| Operating hours counter / Range of values | 0 to 32767 hours |
| Operating hours counter / Granularity | 1 h |
| Operating hours counter / retentive | Yes |
| Clock synchronization / supported | Yes |
| Clock synchronization / to MPI, master | Yes |
| Clock synchronization / on MPI, device | Yes |
| Clock synchronization / to DP, master | Yes |
| Clock synchronization / on DP, device | Yes |
| Clock synchronization / in AS, master | Yes |
| Clock synchronization / in AS, device | Yes |
| Time difference in system when synchronizing via / MPI, max. | 200 ms |
| Number of RS 485 interfaces | 2 |
| Number of other interfaces | 0 |
| Interfaces / Optical interface | No |
| 1. Interface / Interface type | MPI/PROFIBUS DP |
| 1. Interface / Isolated | Yes |
| Interface types / RS 485 | Yes |
| Interface types / Output current of the interface, max. | 150 mA |
| Protocols / MPI | Yes |
| Protocols / PROFIBUS DP master | Yes |
| Protocols / PROFIBUS DP device | No |
| MPI / Number of connections | 32 |
| MPI / Transmission rate, max. | 12 Mbit/s |
| MPI / Services / PG/OP communication | Yes |
| MPI / Services / Routing | Yes |
| MPI / Services / Global data communication | No |
| MPI / Services / S7 basic communication | No |
| MPI / Services / S7 communication | Yes |
| PROFIBUS DP master / Number of connections, max. | 16 |
| PROFIBUS DP master / Transmission rate, max. | 12 Mbit/s |
| 1. Interface / PROFIBUS DP master / max. number of DP devices | 32 |
| 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 | No |
| PROFIBUS DP master / Services / S7 communication | Yes |
| PROFIBUS DP master / Services / Equidistance | No |
| PROFIBUS DP master / Services / SYNC/FREEZE | No |
| PROFIBUS DP master / Services / activation/deactivation of DP devices | No |
| PROFIBUS DP master / Services / Direct data exchange (slave-to-slave communication) | No |
| 1. Interface / PROFIBUS DP master / Address area / Inputs, max. | 2 kbyte |
| 1. Interface / PROFIBUS DP master / Address area / Outputs, max. | 2 kbyte |
| PROFIBUS DP master / User data per DP device / user data per DP device, max. | 244 byte |
| 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 master / User data per DP device / Slots, max. | 244 |
| PROFIBUS DP master / User data per DP device / per slot, max. | 128 byte |
| 2. Interface / Interface type | PROFIBUS DP |
| 2. Interface / Isolated | Yes |
| 2. Interface / PROFIBUS DP master / max. number of DP devices | 96 |
| 2. Interface / PROFIBUS DP master / Address area / Inputs, max. | 6 kbyte |
| 2. Interface / PROFIBUS DP master / Address area / Outputs, max. | 6 kbyte |
| 3. Interface / Interface type | Pluggable synchronization submodule (FO) |
| 3. Interface / Plug-in interface modules | Synchronization submodule IF 960 6ES7960-1AA04-0XA0 or 6ES7960-1AB04- 0XA0 |
| 4. Interface / Interface type | Pluggable synchronization submodule (FO) |
| 4. Interface / Plug-in interface modules | Synchronization submodule IF 960 6ES7960-1AA04-0XA0 or 6ES7960-1AB04- 0XA0 |
| SIMATIC communication / S7 routing | Yes |
| PG/OP communication | Yes |
| PG/OP communication / Number of connectable OPs with message processing | 8 |
| PG/OP communication / Number of connectable OPs without message processing | 31 |
| Global data communication / supported | No |
| S7 basic communication / supported | No |
| S7 communication / supported | Yes |
| S7 communication / as server | Yes |
| S7 communication / as client | Yes |
| S7 communication / User data per job, max. | 64 kbyte |
| S7 communication / User data per job (of which consistent), max. | 462 byte; 1 variable |
| S5 compatible communication / supported | Yes; (via CP max. 10 and FC AG_SEND and FC AG_RECV) |
| S5 compatible communication / User data per job, max. | 8 kbyte |
| S5 compatible communication / User data per job (of which consistent), max. | 240 byte |
| S5 compatible communication / Number of simultaneous AG-SEND/AG-RECV orders per CPU, max. | 24/24 |
| Standard communication (FMS) / supported | Yes; Via CP and loadable FB |
| Number of connections / overall | 32 |
| Number of connections / usable for PG communication / reserved for PG communication | 1 |
| Number of connections / usable for PG communication / adjustable for PG communication, max. | 0 |
| Number of connections / usable for OP communication / reserved for OP communication | 1 |
| Number of connections / usable for OP communication / adjustable for OP communication, max. | 0 |
| Number of connections / usable for S7 basic communication / reserved for S7 basic communication | 0 |
| Number of connections / usable for S7 basic communication / adjustable for S7 basic communication, max. | 0 |
| Number of connections / usable for S7 communication / reserved for S7 communication | 0 |
| Number of connections / usable for S7 communication / adjustable for S7 communication, max. | 0 |
| Number of connections / usable for routing / reserved for routing | 0 |
| Number of connections / usable for routing / adjustable for routing, max. | 0 |
| S7 message functions / Number of login stations for message functions, max. | 8 |
| S7 message functions / Symbol-related messages | No |
| S7 message functions / Program alarms | Yes |
| S7 message functions / simultaneously active Alarm_S blocks, max. | 100 |
| S7 message functions / Alarm 8-blocks | Yes |
| Alarm 8-blocks / Number of instances for alarm 8 and S7 communication blocks, max. | 1 200 |
| Alarm 8-blocks / preset, max. | 900 |
| S7 message functions / Process control messages | Yes |
| S7 message functions / Number of archives that can log on simultaneously (SFB 37 AR_SEND) | 16 |
| Test commissioning functions / Status block | Yes |
| 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, DBs, distributed I/Os, timers, counters |
| Status/control / Number of variables, max. | 70 |
| Forcing / Forcing | Yes |
| Forcing / Forcing, variables | Inputs/outputs, bit memories, distributed I/Os |
| Forcing / Number of variables, max. | 256 |
| Diagnostic buffer / present | Yes |
| Diagnostic buffer / Number of entries, max. | 3 200 |
| Diagnostic buffer / Number of entries, max. / can be set | Yes |
| Diagnostic buffer / Number of entries, max. / preset | 120 |
| Configuration software / STEP 7 | Yes |
| Programming / Command set | see instruction list |
| Programming / Nesting levels | 8 |
| Programming / Access to consistent data in process image | Yes |
| Programming / System functions (SFC) | see instruction list |
| Programming / System function blocks (SFB) | see instruction list |
| Programming / Programming language / LAD | Yes |
| Programming / Programming language / FBD | Yes |
| Programming / Programming language / STL | Yes |
| Programming / Programming language / SCL | Yes |
| Programming / Programming language / CFC | Yes |
| Programming / Programming language / GRAPH | Yes |
| Programming / Programming language / HiGraph® | Yes |
| Programming / Number of simultaneously active SFCs / RD_REC | 8 |
| Programming / Number of simultaneously active SFCs / WR_REC | 8 |
| Programming / Number of simultaneously active SFCs / WR_PARM | 8 |
| Programming / Number of simultaneously active SFCs / PARM_MOD | 1 |
| Programming / Number of simultaneously active SFCs / WR_DPARM | 2 |
| Programming / Number of simultaneously active SFCs / DPNRM_DG | 8 |
| Programming / Number of simultaneously active SFCs / RDSYSST | 8 |
| Programming / Number of simultaneously active SFCs / DP_TOPOL | 1 |
| Programming / Number of simultaneously active SFBs / RDREC | 8 |
| Programming / Number of simultaneously active SFBs / WRREC | 8 |
| Know-how protection / User program protection/password protection | Yes |
| Width | 50 mm |
| Height | 290 mm |
| Depth | 219 mm |
| Weight, approx. | 995 g |
Description
The Siemens 6ES7414-4HM14-0AB0 is the CPU 414-4H, a CPU for the S7-400H redundant system and for S7-400F/FH fail-safe systems. Siemens's data sheet gives it 2.8 MB of memory, 1.4 MB for the program and 1.4 MB for data, an MPI/PROFIBUS DP interface, a PROFIBUS DP interface and two interfaces for fibre-optic synchronisation submodules. It is powered from the S7-400 rack's system power supply.
Application: PLC controller
Used with: SIMATIC S7-400 rack (system power supply)
What is the 6ES7414-4HM14-0AB0 used for?
In an S7-400H system two H-CPUs run the same program and are linked through their synchronisation modules, so the plant keeps running if one fails. It is used in process plants that cannot stop, where a failed CPU must be replaced to restore redundancy.
Key features
- For redundant S7-400H and fail-safe S7-400F/FH systems
- 2.8 MB work memory: 1.4 MB program, 1.4 MB data
- 1st interface MPI/PROFIBUS DP, 2nd interface PROFIBUS DP
- Two plug-in synchronisation submodules (fibre-optic) link it to its partner CPU
- Powered from the S7-400 system power supply
Documents and Resources
Associated Products
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Product Questions
Is the 6ES7414-4HM14-0AB0 discontinued?
Yes. Its manufacturer lifecycle status is Discontinued.
Can another Siemens SIMATIC S7-400 part replace it?
Potential replacements must be checked against the required ratings, dimensions and connections. Sharing a family name does not establish interchangeability.
Do you ship worldwide?
Yes. TimControls ships worldwide. Parts usually ship within 3 to 7 working days of order confirmation, and the exact lead time and shipping options are stated on your quote. Include your delivery country and postal code when you ask for a quote.
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Lifecycle Database
Siemens S7-400 Discontinued Parts List (2026)
Siemens status and dates for each S7-400 order number we track: I/O and function modules cancelled 1 October 2026, CPUs, Siemens source. Free CSV.
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