The Siemens 6ES7194-2AB00-0AA0 is the shielded metal-housing variant of the ET 200AL M8 field-wireable male plug. While mechanically and electrically identical to the plastic 6ES7194-2AA00-0AA0 plug in terms of 4-pole screw terminal wiring, 0.14–0.5 mm² conductor range, and IP65/IP67 protection, the metal housing sets it apart for installations where electromagnetic compatibility (EMC) is a concern. The nickel-plated die-cast zinc body provides integrated shield termination via the cable screen, protecting the 24 V DC power line from conducted and radiated interference.

When does a shielded M8 power connector become necessary?

In most ET 200AL 24 V DC power distribution scenarios, the unshielded plastic connectors (2AA00 plug, 2AC00 socket) are sufficient. Shielding becomes relevant when the power cable runs in parallel with unshielded signal cables, passes near variable-frequency drives, or is installed in an environment with high levels of conducted EMI. The metal housing also provides better mechanical robustness — useful in high-vibration applications such as press lines or heavy machining centers. For PROFINET bus connections, Siemens mandates shielded connectors regardless — but for power, this 2AB00 is the optional shielded choice.

What are the physical differences from the plastic variant?

The metal housing adds approximately 10 g of weight (25 g vs 15 g for the plastic 2AA00) and has a slightly reduced upper operating temperature limit of +80 °C instead of +85 °C. The dimensions (14 × 47 mm) and cable acceptance range (4–5.5 mm diameter) remain identical. The metal surface provides better resistance to cutting oils and certain industrial cleaning agents that may attack plastic housings over time.

Frequently Asked Questions

Does the shield connect automatically when I tighten the housing?

Yes — the metal housing makes circumferential contact with the cable screen when the gland is tightened. No separate drain wire termination is needed. For best results, expose the cable braid for approximately 5 mm and fold it back over the cable jacket before inserting into the connector body.

Is there a metal-housing female socket as well?

Within the ET-Connection M8 field-wireable range, the metal shielded variant is currently available only in the male plug configuration (2AB00). The female socket (2AC00) is offered in plastic only. If your application requires both ends of the cable to be shielded, contact Siemens about custom cable assembly options or consider a pre-assembled M8 cable with molded metal connectors.