Siemens 6ES7131-6BH01-0BA0 SIMATIC ET 200SP DI 16x24VDC ST 16DI 24V DC Sink Remote I/O Module

The Siemens 6ES7131-6BH01-0BA0 is a SIMATIC ET 200SP digital input module with 16 channels of 24 V DC sinking (PNP, P-reading) inputs meeting IEC 61131 type 3 characteristics. It mounts on a Type A0 BaseUnit, reports wire-break and supply-voltage diagnostics, and accepts parameterizable input delays from 0.05 to 20 ms.

Technical Specifications

Selection Notes

The P-reading (PNP sinking) input type means this module switches on a positive signal referenced to the sensor's 24 V supply - pair it with PNP 2-wire or 3-wire sensors rather than NPN devices, which need the complementary sourcing-input variant. Because the input delay is parameterizable from 0.05 ms up to 20 ms per channel, it can be set fast for position encoders on one channel and slow-filtered for noisy limit switches on another within the same module. The module-by-module wire-break diagnostic needs an external 25-45 kOhm protective circuit on simple contact-only encoders, since the module can't tell an open contact from a broken wire without that resistor bridging the input.

Applications

Reads 16 discrete 24 V DC field signals - limit switches, proximity sensors, pushbuttons - into a SIMATIC ET 200SP station on a Type A0 BaseUnit, with PROFINET or PROFIBUS diagnostics for wire-break and supply-voltage faults reported back to the controller.