The 6ES7194-2MH10-0AA0 is the standard 1-meter PROFINET bus daisy-chain cable for the ET 200AL distributed I/O system. Straight M8 plugs at both ends plug directly into adjacent module bus ports—the default choice for linking modules within a single enclosure.

When is the straight bus cable the right pick?

Straight connectors are the practical default for three reasons: they are easier to grip and mate than angled connectors, they route the cable perpendicular to the module face for clean vertical cable management, and they are slightly easier to disconnect during commissioning. If your enclosure provides 50mm or more of clearance from the module face, straight is the faster, more serviceable choice. Switch to angled (6ES7194-2MH10-0AB0) only when door clearance or machine routing demands a lower profile.

How is the bus cable built differently from the power cable?

Bus and power cables in the ET 200AL system are not interchangeable. The green bus cable is a shielded data cable: 2×2×0.5/1.0mm twisted pairs with PE core insulation, wrapped in aluminum-clad foil and tinned-copper braid for dual-layer EMI rejection. The gray power cable is an unshielded 4×0.50mm² conductor assembly. The color code is safety-critical—plugging gray into a green bus port sends 24VDC into the PROFINET interface. Always match jacket color to port color.

Frequently Asked Questions

What cable lengths are available for this straight plug-to-plug bus cable?

This 1m variant (6ES7194-2MH10-0AA0) covers single-enclosure module spacing. Siemens also offers 0.3m, 2m, 5m, 10m, and 15m lengths for tighter enclosure layouts or cross-cabinet runs.

Does this cable support Power over Ethernet (PoE)?

No. The ET 200AL system separates power and data onto dedicated cables for engineering safety. PROFINET data rides on the green bus cable; 24VDC module power runs on a separate gray cable. This isolation prevents a single cable fault from taking down both communication and field power.