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Siemens 6AG1231-4HD32-4XB0 — Analog Input Modules

Siemens 6AG1231-4HD32-4XB0 SIPLUS SM 1231, 4 AI, -40 to 70°C

MPN6AG1231-4HD32-4XB0
Active

Siemens SIPLUS SM 1231 analog input module, 4 channels, 24 VDC, -40 to 70 °C, IP20.

$236.22 – $646.98Ref. price · indicative, final on quote
Siemens 6AG1231-4HD32-4XB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6AG1231-4HD32-4XB0 — Inputs & Signal Ranges
ParameterValue
Number of analog inputs4; Current or voltage differential inputs
Current input rangeYes; 4 to 20 mA, 0 to 20 mA
Voltage input rangeYes; ±10V, ±5V, ±2.5V
Resistance measuring rangesNo
RTD support (resistance thermometer)No
Thermocouple support (types)No
Input range: 0 to 20 mAYes
Input range: 4 to 20 mAYes
Input range: -10 to +10 VYes
Input range: -5 to +5 VYes
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
6AG1231-4HD32-4XB0 — Measurement Performance
ParameterValue
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
6AG1231-4HD32-4XB0 — Diagnostics & Monitoring
ParameterValue
Wire-break detectionYes
Diagnostic alarmYes
Diagnostics functionYes
Supply voltage monitoringYes
6AG1231-4HD32-4XB0 — Power
ParameterValue
Rated value (DC)24 V
Power loss, typ.1.5 W
6AG1231-4HD32-4XB0 — Mechanical
ParameterValue
Required front connectorYes
Width45 mm
Height100 mm
Depth75 mm
Weight, approx.180 g

Product details

The 6AG1231-4HD32-4XB0: Its operating range spans -40 to 70 °C, making it the choice for cold chain, refrigeration, furnace enclosures, or any panel where ambient temperatures exceed the commercial 0–55 °C envelope of the standard 6ES7231-4HD32-0XB0. Diagnostic alarms, wire-break detection, and per-channel parameterization are built in—alarms and diagnostics are enabled by default, so field service gets a fault indication without extra wiring.

No PCN or end-of-life notice is in effect. If you need to second-source against the standard 6ES7231-4HD32-0XB0, this SIPLUS variant is an approved cross—same electrical, larger thermal envelope.

Cycle time for all channels is 625 µs max—fast enough for most process signals, not designed for vibration or high-speed encoder capture. Common-mode voltage limit: 12 V. Input resistance on the 0–20 mA range is 280 Ω, so loop-powered transmitters see a compliant load.

Frequently asked questions

What temperature range does this module support?

Rated for -40 °C minimum to 70 °C maximum, which is the extended-temperature SIPLUS range.

Can I use this module as a drop-in replacement for the standard 6ES7231-4HD32-0XB0?

Yes — same mechanical dimensions, same backplane connector, same 4 differential current/voltage inputs. The only difference is the wider operating temperature range of the SIPLUS version.

What is the power consumption and supply voltage?

Typical power draw is 1.5 W from a 24 VDC supply.

Does it include diagnostic functions?

Yes — diagnostic alarm, wire-break detection, and per-channel parameterization are standard. A status indication for maintenance is also supported.

MPN
6AG1231-4HD32-4XB0