Siemens SIMATIC S7-1200 analog signal modules (SM 1231, 1232, 1234)

Analog input, output and combined I/O signal modules for SIMATIC S7-1200.

Key features

Voltage ranges ±10 V, ±5 V, ±2.5 V and current 0/4-20 mA
SM 1231 high-feature 15-bit + sign input version
SM 1232 outputs with 14-bit (voltage) / 13-bit (current) resolution
SM 1234 combined 4 AI / 2 AO
Plug-in terminal blocks

Specifications

Brand	Siemens
Product line	SIMATIC
Series	SIMATIC S7-1200
Signals	Voltage / current
Voltage ranges	±10 V, ±5 V, ±2.5 V
Current ranges	0-20 mA / 4-20 mA
Terminals	Gold-plated, screw or push-in
Engineering	STEP 7 (TIA Portal)
Source	Siemens Catalog ST 70 · 2026, p. 217-230

6ES7231-5ND32-0XB0		Module: SM 1231 \| Channels: 4 AI \| Resolution: 15 bit + sign
6ES7231-4HD32-0XB0		Module: SM 1231 \| Channels: 4 AI \| Resolution: 12 bit + sign
6ES7231-4HF32-0XB0		Module: SM 1231 \| Channels: 8 AI \| Resolution: 12 bit + sign
6ES7232-4HB32-0XB0		Module: SM 1232 \| Channels: 2 AO \| Resolution: 14 bit V / 13 bit mA
6ES7232-4HD32-0XB0		Module: SM 1232 \| Channels: 4 AO \| Resolution: 14 bit V / 13 bit mA
6ES7234-4HE32-0XB0		Module: SM 1234 \| Channels: 4 AI / 2 AO \| Resolution: 14 bit V / 13 bit mA

PLC I/O ModulesSiemens

6 product codes available in this family

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Siemens SIMATIC S7-1200 analog signal modules (SM 1231, 1232, 1234)

Brand Siemens·PLC I/O Modules

Available part numbers (6)

6ES7231-5ND32-0XB0, 6ES7231-4HD32-0XB0, 6ES7231-4HF32-0XB0, 6ES7232-4HB32-0XB0, 6ES7232-4HD32-0XB0, 6ES7234-4HE32-0XB0

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Product codes & specifications

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RFQ List (0)

	Product code	Spec
	6ES7231-5ND32-0XB0	Module: SM 1231 \| Channels: 4 AI \| Resolution: 15 bit + sign
	6ES7231-4HD32-0XB0	Module: SM 1231 \| Channels: 4 AI \| Resolution: 12 bit + sign
	6ES7231-4HF32-0XB0	Module: SM 1231 \| Channels: 8 AI \| Resolution: 12 bit + sign
	6ES7232-4HB32-0XB0	Module: SM 1232 \| Channels: 2 AO \| Resolution: 14 bit V / 13 bit mA
	6ES7232-4HD32-0XB0	Module: SM 1232 \| Channels: 4 AO \| Resolution: 14 bit V / 13 bit mA
	6ES7234-4HE32-0XB0	Module: SM 1234 \| Channels: 4 AI / 2 AO \| Resolution: 14 bit V / 13 bit mA

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Siemens SIMATIC S7-1200 analog signal modules (SM 1231, 1232, 1234)