The Siemens 6ES7922-3BD00-0AT0 is a pre-assembled front connector MTA (Marshalled Termination Assembly) for the SIMATIC S7-300 PCS7 system, carrying 40 poles over a 3 m round cable with a black PVC sheath. Rated at 24 V with a maximum of 30 V, it terminates the field-side connector strip to a screw-type terminal block on the enclosure, handling digital signal transmission for up to 40 channels.
The 40-pole front connector mates directly with the S7-300 40-pin front connector receptacle (6ES7392-1AM00-0AA0) and breaks out to a 25-pole D-SUB pin for the ET200M distributed I/O interface. The 3 m cable length is fixed — no field cutting or re-termination of the round cable is intended, so the routing path between the S7-300 rack and the ET200M station must fit within that span. The 0.5 mm² conductor cross-section is sized for signal-level digital I/O; it is not rated for power distribution.
Designed for the SIMATIC S7-300 PCS7 MTA system, this cable assembly is the physical link between the S7-300 controller (or ET200M remote I/O) and the marshalled termination assembly in a PCS7 process control cabinet. It carries digital signals only — no analog transmission — so it suits discrete I/O points such as valve position feedback, motor start/stop, and limit switches in a process line.