Siemens 6ES7231-5PF30-0XB0 Analog Input

The 6ES7231-5PF30-0XB0 measures temperature signals from RTDs and thermocouples. This module connects directly to Siemens S7-1200 PLC systems. Its rectangular frame measures 100 millimeters in width. The module height reaches 75 millimeters exactly. Depth stays at 62 millimeters. You will find this unit weighs approximately 0.21 kilograms. Therefore, installation requires clipping the module onto a DIN rail. One removable 12-position terminal block handles all field wiring connections.

Physical Layout and Connectors

The terminal block accepts solid wires up to 16 AWG gauge. Each channel uses two or three terminals for sensor connections. A green LED indicates power present on the module. Four mounting tabs secure the unit to TS35 DIN rails. You can remove the terminal block without disconnecting the module from the rail.

Technical Specifications

Parameter	Specification
Module Width	100 mm
Module Height	75 mm
Module Depth	62 mm
Unit Weight	0.21 kg
Analog Inputs	8 (RTD or thermocouple)
Terminal Block	1 x 12-position (16 AWG)
Component Total	186 discrete parts
Supported RTDs	PT100, PT1000, Ni100, Ni1000
Supported Thermocouples	J, K, T, E, R, S, N
Temperature Resolution	0.1°C / 0.1°F
Accuracy	±0.5% of full scale
Conversion Time	50 ms per channel
Internal Energy Storage	220 µF capacitor bank
Isolation Voltage	1500V (channel to backplane)
Operating Temperature	-20°C to +55°C

Internal Design and Energy Storage

The 6ES7231-5PF30-0XB0 contains exactly 186 discrete components onboard. A 220 microfarad capacitor bank filters noise from the internal power supply. Eight independent signal conditioning circuits handle each sensor type. Each circuit includes programmable gain and cold junction compensation. A 24-bit sigma-delta ADC converts sensor readings with high precision. The module also provides sensor break detection on every channel.

Operational Performance

This analog input module accepts RTD and thermocouple signals directly. It automatically detects sensor type based on configuration. Moreover, the unit performs linearization for all standard thermocouples. You can configure each channel independently using PLC software. The module filters 50 Hz and 60 Hz noise with digital filtering. Eight LEDs indicate active channels during normal operation. Consequently, you achieve accurate temperature measurement for process control. Siemens designed this module for S7-1200 expansion. Its compact size saves space inside control cabinets.

In summary, the 6ES7231-5PF30-0XB0 delivers precise temperature measurement. Use this module for ovens, chillers, or environmental chambers. It supports eight sensors in a single slot design. Order this analog input module for your Siemens S7-1200 system.