The 6ES7194-2MH50-0AA0 is a 5-meter shielded PROFINET bus cable with straight M8 plugs at both ends—the standard daisy-chain link for ET 200AL distributed I/O. Plug one end into the bus-out port of one module, the other into the bus-in port of the next. Green PUR jacket, 4-pole M8, dual-shield construction.

When do I use a plug-to-plug cable vs an open-end cable?

Plug-to-plug is the standard daisy-chain choice—both ends connect to M8 bus ports on ET 200AL modules. Use it when every link in your PROFINET chain lands on a standard interface module or I/O module with M8 bus ports. Choose an open-end cable (6ES7194-2MH50-0AC0) only when the far end terminates on a terminal block, patch panel, or non-M8 device. If both ends have M8 ports, plug-to-plug is correct.

How many ET 200AL modules can I daisy-chain with these cables?

ET 200AL supports up to 16 I/O modules per interface module in a linear bus topology. Each I/O module provides two M8 bus ports—one in, one out—so a daisy chain uses one plug-to-plug cable between each adjacent module pair. At 5 meters per cable, this specific length bridges modules distributed across a large machine frame or between adjacent enclosures. For shorter inter-module hops within the same enclosure, use the 2m or 15cm variants.

Frequently Asked Questions

Does this green bus cable carry 24VDC power?

No. Green jacket cables are PROFINET bus only—shielded 2×2×0.5/1.0mm twisted pairs carrying Ethernet signals at 100 Mbit/s. The ET 200AL system separates power (gray jacket, 4×0.50mm² unshielded) from communication (green jacket, shielded). Plugging a gray power cable into a green bus port sends 24VDC into the Ethernet PHY and destroys the interface. Always match jacket color to port function.

What is the maximum bus length for ET 200AL?

The PROFINET bus segment between any two ET 200AL stations can reach 100 meters with proper M8 shielded cabling. This 5m cable is well within that limit—use it for intermediate distances. For station-to-station runs approaching the 100m limit, consider fiber-optic or a PROFINET switch with copper uplinks.