The 6ES7194-2LH50-0AA0 is a 5-meter shielded PROFINET bus cable for SIMATIC ET 200AL with straight M8 connectors at both ends—one plug, one socket. The green PVC jacket identifies it as a bus cable (2Y(ST)CY dual-shielded, 4-pole), and at 5 meters it is the longest standard straight-connector green bus cable for daisy-chaining ET 200AL nodes across a large machine frame.

Straight or angled—which connector geometry should I choose?

The choice is about clearance above the M8 port. An angled connector exits at 90 degrees and needs only about 12 mm of headroom above the port—ideal when the module is mounted under a low overhang, behind a cover, or on a machine frame member with limited vertical space. A straight connector extends roughly 30 mm from the port face before the cable bends—easier to grip and plug in, but it needs that overhead clearance. If the ET 200AL modules are mounted on an open DIN rail with nothing above them, straight connectors (this cable) are simpler to handle. If the modules sit under a machine guard or in a tight enclosure corner, use the angled variant (6ES7194-2LH50-0AB0).

Green means bus—the same safety warning applies.

ET 200AL uses green for shielded PROFINET bus and gray for unshielded 24 V DC power. They share the same M8 form factor but carry incompatible signals. Cross-plugging can destroy the PROFINET ASIC on modules without internal protection. Check jacket color before every connection.