Siemens 6ES7231-4HF32-0XB0 SM 1231 Analog Input Module 8 Channel ±10V 4‑20mA

8‑channel analog input module for S7‑1200 systems, accepting voltage (±10V, ±5V, ±2.5V) or current (0‑20mA, 4‑20mA) signals for precision measurement of sensors and transmitters in industrial automation.

The Siemens 6ES7231‑4HF32‑0XB0 is a SM 1231 analog input module for the SIMATIC S7‑1200 PLC family. It provides 8 differential input channels with 12‑bit+sign resolution (13‑bit ADC), supporting multiple voltage and current ranges. The module features 625 µs cycle time (all channels) and can be used to connect pressure sensors, flow meters, position sensors, and other analog field devices without additional amplifiers.

Applications

• Process monitoring (pressure, flow, level)

• Factory automation signal acquisition

• Motion control position feedback

• Machine health diagnostics

• Temperature monitoring (with external transmitter)

Key Features

• 8 analog input channels (voltage or current, configurable)

• Input ranges: ±10V, ±5V, ±2.5V, 0‑20mA, 4‑20mA

• 12‑bit resolution + sign (13‑bit ADC)

• 625 µs cycle time for all channels

• Diagnostic functions: supply voltage monitoring, wire break detection

• 24V DC power supply, 45‑60 mA current consumption

• Compact 45 × 100 × 75 mm dimensions, IP20 protection

• Operating temperature: -20°C to 60°C

Technical Specifications

• Manufacturer: Siemens

• Model: 6ES7231-4HF32-0XB0

• Product Type: SM 1231 Analog Input Module

• Number of Inputs: 8 (differential)

• Input Ranges: ±10V, ±5V, ±2.5V, 0‑20mA, 4‑20mA

• Resolution: 12-bit + sign (13-bit ADC)

• Cycle Time: 625 µs (all channels)

• Supply Voltage: 24V DC (20.4‑28.8V DC)

• Current Consumption: 60 mA (45‑60 mA typical)

• Backplane Current: 90 mA @ 5V DC

• Power Loss: 1.5 W max

• Input Impedance: ≥9 MΩ (voltage), 280 Ω (current)

• Protection Rating: IP20

• Dimensions: 45 × 100 × 75 mm

• Weight: approx. 0.20 kg

• Certifications: CE, RoHS, cULus, FM, RCM, KC

System Integration

• PLC Controllers: SIMATIC S7‑1200 (CPU 1212C, 1214C, 1215C, 1217C)

• Configuration Software: TIA Portal (STEP 7 Basic or Professional)

• Mounting: Side‑by‑side DIN rail installation on controller left side

• Wiring: Front connector (screw‑type or spring‑type, sold separately)

Related Products

• CPU Controller: Siemens 6ES7215‑1AG40‑0XB0 CPU 1215C – system core

• Analog Output Module: Siemens 6ES7232‑4HD32‑0XB0 SM 1232 – output pairing

• Digital I/O: Siemens 6ES7221‑1BH32‑0XB0 SM 1221 – input expansion

• Front Connector: Siemens 6ES7292‑1AX30‑0XA0 – 20‑pin connector

PLC ERA is an independent industrial automation distributor. Products are sourced from established supply channels and inspected before shipment. International shipping available.