BOM / RFQ

Siemens 6AG1231-4HD30-4XB0 — Analog Input Modules

Siemens 6AG1231-4HD30-4XB0 Analog Input Module, 4 AI, -40 to

MPN6AG1231-4HD30-4XB0

Siemens SIMATIC S7-1200 SM 1231, analog input module, 4 AI, current or voltage differential inputs, 0/4 to 20 mA, ±10V/±5V/±2.5V, diagnostic alarms, IP20, -40 to 70°C, 24 VDC, 45 mm wide.

$381.00Ref. price · indicative, final on quote

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Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6AG1231-4HD30-4XB0 — Inputs & Signal Ranges
Parameter	Value
Number of analog inputs	4; Current or voltage differential inputs
Current input range	Yes; 0 to 20 mA
Voltage input range	Yes; ±10V, ±5V, ±2.5V
Resistance measuring ranges	No
RTD support (resistance thermometer)	No
Thermocouple support (types)	No
Input range: 0 to 20 mA	Yes
Input range: -10 to +10 V	Yes
Input range: -5 to +5 V	Yes
Input resistance (0 to 20 mA)	280 Ω
Input resistance (-10 to +10 V)	≥9 MOhm
Permissible input voltage, max. (destruction limit)	35 V
Permissible input current, max. (destruction limit)	40 mA

6AG1231-4HD30-4XB0 — Measurement Performance
Parameter	Value
Resolution (bit incl. sign), max.	12 bit; + sign
Temperature measurement error (±)	25 °C ±0.1%, to 55 °C ±0.2% total measurement range
Voltage measurement error (±)	0.1 %
Current measurement error (±)	0.1 %
Interference voltage suppression (at interference frequency)	40 dB, DC to 60 V for interference frequency 50 / 60 Hz
Common-mode voltage, max.	12 V

6AG1231-4HD30-4XB0 — Diagnostics & Monitoring
Parameter	Value
Wire-break detection	No
Diagnostic alarm	Yes
Diagnostics function	Yes
Supply voltage monitoring	Yes

6AG1231-4HD30-4XB0 — Power
Parameter	Value
Rated value (DC)	24 V
Power loss, typ.	1.5 W

6AG1231-4HD30-4XB0 — Mechanical
Parameter	Value
Required front connector	Yes
Width	45 mm
Height	100 mm
Depth	75 mm
Weight, approx.	180 g

Product details

What this module brings to an S7-1200 rack

The 6AG1231-4HD30-4XB0: Four analog inputs, each configurable as current (0 to 20 mA, 280 Ω input resistance) or bipolar voltage (±10 V, ±5 V, ±2.5 V). The differential front end handles common-mode voltages up to 12 V. IP20 means it belongs in a clean, enclosed cabinet. Diagnostic alarms for wire-break, under/over range, and supply-voltage monitoring are parameterizable. The module signals trouble without polling the channel data. Power draw is 1.5 W typical, 45 mA from the 24 VDC backplane bus.

CE and FM approvals on file. The module carries a plastic housing, rated fall height 0.3 m (five times in package).