The 6ES7141-6BH00-0AB0 is a 16-channel digital input module from the SIMATIC ET 200eco PN family, designed for cabinet-free machine-mount installation. It provides 16 Type 3 inputs (IEC 61131) at 24V DC through 8 M12 connectors with duplicate assignment. Each M12 port carries two input channels, and the module includes 8 encoder supply outputs at 100mA each to power connected sensors directly.

What do Type 3 inputs mean for sensor compatibility?

Type 3 inputs per IEC 61131 accept signals from 2-wire, 3-wire, and 4-wire proximity switches. The input recognizes signal "1" at 11-30V and signal "0" at -3 to +5V, with a typical input current of 7mA at 24V. The 1.5mA maximum quiescent current rating ensures compatibility with standard 2-wire sensors whose off-state leakage stays within this limit.

How does the encoder supply simplify field wiring?

Eight short-circuit-protected encoder supply outputs deliver 100mA each at 24V DC. Each supply powers the sensor connected to an M12 port, eliminating separate sensor power distribution boxes. The supply is electronically protected in channel groups and reports faults via PROFINET diagnostics. For sensors exceeding 100mA, an external supply is required.

Lifecycle status and migration path

This product entered phase-out (PM400) on October 1, 2024. It remains orderable while stocks last. Siemens recommends migrating new designs to the M12-L generation successor 6ES7141-6BH00-0BB0, which adds MultiFieldbus support (PROFINET, EtherNet/IP, Modbus TCP), IP69K rating, configurable input filtering, and isochronous mode. Both modules share identical M12 pin assignments and mounting dimensions for drop-in replacement with a STEP 7 upgrade.

Frequently Asked Questions

Can I connect 2-wire proximity sensors to this module?

Yes. The Type 3 input characteristic is designed for 2-wire sensors. Verify that the sensor off-state leakage current does not exceed 1.5mA and that the sensor can operate with the module 7mA input current draw at signal "1."

What is the difference between this module and the 8DI variant 6ES7141-6BG00-0AB0?

The 6BH00 provides 16 digital inputs; the 6BG00 provides 8. Both share the same housing (60mm wide), M12 connectors, and PROFINET interface. Choose 6BH00 when you need 16 inputs in a single module width; choose 6BG00 when 8 inputs suffice and the lower power consumption (3.5W vs 6.5W) matters.