The 6ES7194-2MN10-0AC0 is a 10-meter shielded PROFINET bus cable with a straight M8 plug on one end and open conductors on the other. It brings PROFINET from an ET 200AL bus port to a patch panel, terminal block, or custom RJ45 breakout — wherever the network terminates in something other than another M8 port.

Why open-end for a bus cable?

Not every PROFINET segment ends at an M8 port. If the ET 200AL station connects to a managed switch with RJ45 ports, a patch panel in the cabinet door, or a customer-specific termination block, a double-ended M8 cable forces you to either cut off a molded plug (losing the shield termination and IP rating) or add an adapter. The open-end variant gives you access to the shield drain wire and twisted pairs — land them on IDC or screw terminals your way, with the shield carried through to the termination point. The molded M8 plug keeps IP65/IP67 at the ET 200AL end.

What is inside the green jacket?

Shielded 2×2×0.5/1.0mm twisted pairs with PE core insulation, wrapped in overlapped aluminum-clad foil and a tinned-copper wire braid. The dual-layer shield protects PROFINET frames against EMI from drives, contactors, and switching noise that saturates every industrial cabinet. The green jacket identifies it as a bus cable — do not plug it into the gray power port. 24VDC into a PROFINET PHY destroys the interface.

Frequently Asked Questions

How do I terminate the open end correctly for PROFINET?

Maintain the twist in each pair as close to the termination point as possible — untwist only the last 10-15mm. Connect the shield drain wire to functional earth at the termination end. Match the conductor color code to the ET 200AL bus port pinout: the Siemens operating instructions for your specific ET 200AL interface module document the M8 pin assignment. A mismatched pair swap produces a link that looks connected but drops frames under load.

Can I shorten this cable?

Yes — that is one reason to buy the open-end variant. Trim the open end to the exact length needed for your installation. Keep the shield intact along the remaining length and re-terminate cleanly. Do not cut the molded M8 plug end — that end is factory-sealed for IP65/IP67.