What is the Siemens 6ES7142-6BH00-0AB0?

The 6ES7142-6BH00-0AB0 is a high-density digital output module from the SIMATIC ET 200eco PN family. It provides 16 digital outputs at 1.3A per channel, 24V DC, through 8×M12 5-pole connectors using double assignment — two independent outputs per physical M12 port. The module fits the same 60×175×49mm footprint as the 8-channel variants, effectively doubling channel density without sacrificing mounting space.

How does double assignment work?

Each M12 5-pole connector carries two output channels: pins 1 and 4 supply the first channel, pins 2 and 5 supply the second. A standard M12 Y-splitter cable or a dual-channel field device connector breaks these out to two individual actuators. The module monitors wire-break and short-circuit per channel independently — diagnostics remain granular even though two channels share one physical connector.

16-channel vs. 8-channel — which one should I choose?

Choose the 6BH00 when I/O density is the priority — it halves the number of modules needed for actuator-heavy stations, saving space on the machine frame and reducing the number of PROFINET nodes to manage. Choose an 8-channel variant (6BR00 at 2A or 6BG00 at 1.3A) when each actuator needs its own dedicated M12 port without a splitter cable, or when the 2A drive current is required. All variants use the same PROFINET interface and mount interchangeably on the same machine surface.