Siemens 6ES7131-6FD01-0BB1 SIMATIC ET 200SP DI 4x120-230V AC ST Remote I/O Module

The Siemens 6ES7131-6FD01-0BB1 is a SIMATIC ET 200SP digital input module with 4 inputs rated 230V AC, IEC 61131 type 3, switching signal 1 above 74V AC and carrying up to 10A per output-side load path through BaseUnit type B1. It reports channel and module diagnostics with green PWR and DIAG LEDs.

Technical Specifications

Selection Notes

Four channels at 120-230V AC rather than eight at 24V DC means this module is sized for mains-level field devices - pilot lights, mains-voltage limit switches, relay contacts - not low-voltage sensors, so it belongs on stations where the field wiring is already at line voltage. BaseUnit type B1 has no built-in short-circuit protection on this module, so a 10A quick-acting fuse must be fitted on the BU before commissioning; skipping that step leaves the output-side path unprotected. The 74V AC signal-1 threshold gives a wide margin above typical 100-115V AC noise, useful where the input wiring runs alongside motor or drive cabling.

Applications

Fits panels reading mains-voltage field signals directly - door interlocks, indicator lamps, or relay contacts wired at 120-230V AC - without an intermediate 24V DC interposing relay.