The Siemens 6ES7194-2AC00-0AA0 is a field-wireable M8 female socket (jack) designed for 24 V DC power supply connections in SIMATIC ET 200AL distributed I/O systems. With 4-pole screw terminal termination and a straight 180° cable outlet, it accepts conductors from 0.14 mm² to 0.5 mm² (AWG 26–20) with cable diameters of 4–5.5 mm. The plastic housing provides IP65/IP67 protection, making it suitable for direct on-machine installation without an enclosure.

What is the difference between the socket (2AC00) and the plug (2AA00)?

The 6ES7194-2AC00-0AA0 is the female socket (jack) with internal contacts. The 6ES7194-2AA00-0AA0 is the male plug with exposed pins. Both share identical electrical specifications, plastic housing, and screw terminal wiring. The choice depends on which side of the M8 connection you are wiring — the socket typically goes on the device-facing or cable-extension side, while the plug connects to the panel or sensor side. In an ET 200AL power daisy-chain, you will typically need both genders.

When should I choose the metal shielded variant (2AB00) over this plastic version?

The 6ES7194-2AB00-0AA0 is the metal-housing, shielded variant of the M8 plug. Choose the metal version when you need electromagnetic compatibility (EMC) protection — for example, in installations near variable-frequency drives, welding equipment, or other sources of electrical noise. The plastic versions (2AC00 and 2AA00) are sufficient for standard 24 V DC power distribution where shielding is not required. The metal variant is approximately 10 g heavier (25 g vs 15 g) and uses a nickel-plated die-cast zinc housing.

Frequently Asked Questions

What cable cross-section range does this connector support?

The screw terminals accept 0.14 mm² to 0.5 mm² conductors, corresponding to AWG 26 through AWG 20. The cable outer diameter must be between 4 mm and 5.5 mm for proper sealing at the cable gland.

Can this connector be used outdoors?

With IP65/IP67 protection, this connector is dust-tight and protected against water jets and temporary immersion. The operating temperature range of -30 °C to +85 °C covers most outdoor industrial environments. However, extended UV exposure may degrade the plastic housing over time — for extreme outdoor conditions, consider the metal-housing 2AB00 variant.

Is this connector compatible with standard M8 sensors?

This connector is designed specifically for ET 200AL 24 V DC power distribution and uses a 4-pole pinout optimized for power. While it uses the standard M8 mechanical interface, the pin assignment follows the ET-Connection power specification, not the typical 3-wire or 4-wire sensor signal pinout. Always verify pin compatibility with your specific device before wiring.