Siemens 6ES7323-1BH01-0AA0

SM 323 digital I/O, 8 DI and 8 DO, 24 V DC, 0.5 A

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Siemens SIMATIC S7-300 SM 323 digital input/output module: 8 inputs and 8 outputs at 24 V DC, 0.5 A per output, isolated, one 20-pole front connector.

Manufacturer: Siemens
Manufacturer part no.: 6ES7323-1BH01-0AA0
Product family: SIMATIC S7-300 PLC Modules
Type: Digital I/O module
Category: PLCs and I/O › Digital I/O modules
Lifecycle: Discontinued
OEM successor: Not stated
Technical datasheet: Data sheet

Technical specifications

Manufacturer: Siemens
Manufacturer part no.: 6ES7323-1BH01-0AA0
Type: Digital I/O module
Application: Digital input/output module
Used with: SIMATIC S7-300 rack (S7-300 backplane bus)
Load voltage L+ / Rated value (DC): 24 V
Load voltage L+ / permissible range, lower limit (DC): 20.4 V
Load voltage L+ / permissible range, upper limit (DC): 28.8 V
Input current / from load voltage L+ (without load), max.: 40 mA
Input current / from backplane bus 5 V DC, max.: 40 mA
Power loss, typ.: 3.5 W
Number of digital inputs: 8
Digital inputs / Input characteristic curve in accordance with IEC 61131, type 1: Yes
Number of simultaneously controllable inputs / horizontal installation / up to 60 °C, max.: 8
Number of simultaneously controllable inputs / vertical installation / up to 40 °C, max.: 8
Input voltage / Type of input voltage: DC
Input voltage / Rated value (DC): 24 V
Input voltage / for signal "0": -30 to +5 V
Input voltage / for signal "1": 13 to 30V
Input current / for signal "1", typ.: 7 mA
Input delay (for rated value of input voltage) / for standard inputs / at "0" to "1", min.: 1.2 ms
Input delay (for rated value of input voltage) / for standard inputs / at "0" to "1", max.: 4.8 ms
Input delay (for rated value of input voltage) / for standard inputs / at "1" to "0", min.: 1.2 ms
Input delay (for rated value of input voltage) / for standard inputs / at "1" to "0", max.: 4.8 ms
Cable length / shielded, max.: 1 000 m
Cable length / unshielded, max.: 600 m
Number of digital outputs: 8
Digital outputs / Short-circuit protection: Yes
Short-circuit protection / Response threshold, typ.: 1 A
Digital outputs / Limitation of inductive shutdown voltage to: L+ (-53 V)

Show all 65 specifications

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: 0.5 A
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
Output delay with resistive load / "0" to "1", max.: 100 µs
Output delay with resistive load / "1" to "0", max.: 500 µs
Parallel switching of two outputs / for uprating: No
Parallel switching of two outputs / for redundant control of a load: Yes; only outputs of the same group
Switching frequency / with resistive load, max.: 100 Hz
Switching frequency / with inductive load, max.: 0.5 Hz
Switching frequency / with inductive load (acc. to IEC 60947-5-1, DC13), max.: 0.5 Hz
Switching frequency / on lamp load, max.: 10 Hz
Total current of the outputs (per group) / horizontal installation / up to 40 °C, max.: 4 A
Total current of the outputs (per group) / horizontal installation / up to 60 °C, max.: 4 A
Total current of the outputs (per group) / vertical installation / up to 40 °C, max.: 4 A
Connectable encoders / 2-wire sensor: Yes
Connectable encoders / 2-wire sensor / permissible quiescent current (2-wire sensor), max.: 2 mA
Interrupts/diagnostics/status information / Alarms: No
Interrupts/diagnostics/status information / Diagnostics function: No
Diagnostics indication LED / Status indicator digital input (green): Yes
Diagnostics indication LED / Status indicator digital output (green): Yes
Potential separation digital inputs / between the channels: Yes
Potential separation digital inputs / between the channels, in groups of: 8
Potential separation digital inputs / between the channels and backplane bus: Yes; Optocoupler
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; Optocoupler
Isolation tested with: 500 V DC
required front connector: 20-pin

Technical documents (1)

Siemens data sheet 6ES7323-1BH01-0AA0

Key features

8 digital inputs and 8 digital outputs, 24 V DC
Outputs rated 0.5 A, short-circuit protected
Inputs and outputs isolated in separate groups of 8
Input delay 1.2 to 4.8 ms; no diagnostics
Discontinued by Siemens on 1 October 2025; spare part only

About the Siemens 6ES7323-1BH01-0AA0

The Siemens 6ES7323-1BH01-0AA0 is the 20-pin SM 323: 8 inputs and 8 outputs on one module, where the 6ES7323-1BL00-0AA0 has 16 of each on a 40-pin connector. Siemens's data sheet gives 24 V DC for inputs and outputs, 0.5 A per output with short-circuit protection, inputs and outputs isolated in separate groups of 8, and a 20-pin front connector. Siemens's data sheet marks it as a spare part.

What is the 6ES7323-1BH01-0AA0 used for?

It handles a few digital inputs and outputs in a single S7-300 slot.

Lifecycle and successor

Discontinued.

Before you order

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

Check the order number: 1BH01 is the 8 DI/8 DO module with a 20-pin connector; 1BL00 is the 16 DI/16 DO module.

Other parts in the Siemens SIMATIC S7-300 family

Listed for reference. They differ from the 6ES7323-1BH01-0AA0 in rating, supply, interface or function and are not interchangeable with it unless Siemens says so. Match the part number on your unit.

Product	Type	Lifecycle	Qty Available	Price	Action
Siemens 6ES7322-1BH01-0AA0SM 322 digital output, 16 DO, 24 V DC, 0.5 A	Digital output module	Discontinued	On Request	On request	View
Siemens 6ES7322-1HH01-0AA0SM 322 relay output, 16 DO, relay contacts	Digital output module	Discontinued	On Request	On request	View
Siemens 6ES7323-1BL00-0AA0SM 323 digital I/O, 16 DI and 16 DO, 24 V DC	Digital I/O module	Discontinued	On Request	On request	View
Siemens 6ES7321-1FH00-0AA0SM 321 digital input, 16 DI, 120/230 V AC	Digital input module	Discontinued	On Request	On request	View
Siemens 6ES7322-1FH00-0AA0SM 322 digital output, 16 DO, 120/230 V AC, 1 A	Digital output module	Discontinued	On Request	On request	View
Siemens 6ES7322-1HF01-0AA0SM 322 relay output, 8 DO, relay contacts	Digital output module	Discontinued	On Request	On request	View
Siemens 6ES7321-7BH01-0AB0SM 321 digital input, 16 DI, 24 V DC, diagnostics and hardware interrupt	Digital input module	Discontinued	On Request	On request	View
Siemens 6ES7321-1BH50-0AA0SM 321 digital input, 16 DI, 24 V DC, sourcing input	Digital input module	Discontinued	On Request	On request	View
Siemens 6ES7321-1FF01-0AA0SM 321 digital input, 8 DI, 120/230 V AC	Digital input module	Discontinued	On Request	On request	View
Siemens 6ES7322-1BF01-0AA0SM 322 digital output, 8 DO, 24 V DC, 2 A	Digital output module	Discontinued	On Request	On request	View
Siemens 6ES7322-8BF00-0AB0SM 322 digital output, 8 DO, 24 V DC, 0.5 A, diagnostics	Digital output module	Discontinued	On Request	On request	View
Siemens 6ES7322-1HF10-0AA0SM 322 relay output, 8 DO, 5 A, isolated per channel	Digital output module	Discontinued	On Request	On request	View

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