The 6ES7194-2MH20-1AA0 is a 2-meter 24VDC power extension with straight M8 plug and socket—the go-to inter-module power link for ET 200AL stations within a single enclosure. Plug one end into a module's power-out port; the socket end accepts the next module's input plug. Gray PUR jacket, 4×0.50mm² unshielded conductors.

When is 2 meters the right length for power extension?

Two meters covers the typical enclosure width—most control cabinets are 800-1200mm wide internally, so a 2m cable routes from one end to the other with enough slack for cable management. For inter-enclosure power runs where cabinets are separated by 5 meters or more, step up to the 5m variant (6ES7194-2MH50-1AA0). For module-to-module hops under 500mm, the 19cm power cables are a cleaner fit.

How many modules can I power through daisy-chained extensions?

The ET 200AL power bus can supply up to 4A per supply line (1L+/2L+) on the 24VDC rail. Each I/O module draws its own load—sum the module currents and verify the total stays under 4A per supply line. Voltage drop across each extension cable is negligible at 2 meters with doubled 0.50mm² conductors (1.0mm² effective per pole pair). For large I/O counts, consider splitting the power bus into segments fed from separate supply modules rather than one long chain.

Frequently Asked Questions

Is this cable shielded?

No. 24VDC power cables in the ET 200AL system are unshielded—4×0.50mm² with PP core insulation and PUR jacket. Shielding is unnecessary for DC power distribution and would add cost and stiffness. The PROFINET bus cables (green jacket) are the shielded ones.

What is the operating temperature range?

The cable operates from -25 to +80°C with a PUR jacket rated for 2 million flex cycles at a 51mm bend radius. Inside a standard control cabinet (typically 0-55°C ambient), it operates well within its ratings.