The 6ES7194-2MH20-1AC0 is a 2-meter 24VDC power cable with a straight M8 socket on one end and open pigtail wires on the other—built for ET 200AL field terminations where the power source is a module plug output and the load is a terminal block or custom distribution point. Gray PUR jacket, 4×0.50mm² unshielded conductors.

Why a socket end instead of a plug end for field termination?

The socket end connects to an ET 200AL module's M8 plug output port—the module presents a male connector, so the mating cable end must be female (socket). This is the standard topology when you are tapping power from a module and routing it to a terminal block for field distribution. If your module presents an M8 socket instead (some power supply modules), you would use a plug-ended cable. Always verify the connector gender on your specific module before ordering.

How do I terminate the open end safely?

The four conductors follow the ET 200AL power color code. Strip each conductor, apply a ferrule, and land on the terminal block or power distribution strip matching the pinout of the source module. Siemens recommends 0.5mm² wire-end ferrules with insulating collar for these conductors. Do not leave unused conductors floating—insulate them individually and secure them away from live terminals.

Frequently Asked Questions

Can this gray cable replace a green bus cable if I only need power?

Yes—but only connect it to gray power ports. The gray jacket is the visual identifier for 24VDC power distribution. Never plug a gray power cable into a green PROFINET bus port; the 24VDC will destroy the Ethernet PHY. The color-coding system is a safety feature of ET 200AL—respect it.

What is the difference between socket-to-open-end and plug-to-open-end?

The difference is which M8 gender your source module requires. Modules with a male (plug) output port need a socket-ended cable like this one. Modules with a female (socket) output port need a plug-ended cable. Check your module's port gender—or keep both cable types in stock for field flexibility.