The 6ES7902-3AB00-0AA0 is a 5-meter RS422 point-to-point connection cable with 15-pin D-Sub connectors—plug at one end, socket at the other. This is the shortest standard length in the 6ES7902-3 RS422 series, sized for installations where the CP 340/341/440 communication processor and the RS422 partner device sit in the same enclosure or on the same panel—no excess cable to manage, no service loop to coil.

5 meters versus 10 or 50—how short is too short?

Five meters is not "too short" for RS422—it is the right length when both devices are physically close. RS422 has no minimum cable length; the electrical specification works down to zero. The only thing you lose by going shorter than needed is... reach. If the CP and the partner device are in the same cabinet, this 5-meter cable routes cleanly through the wire duct without the two or three extra meters of coiled excess that a 10-meter cable would leave behind. If the partner is in the next cabinet, use the 10-meter variant (6ES7902-3AC00). If it is across the plant floor, use the 50-meter (6ES7902-3AG00).

Is this cable affected by the 6ES7902-3AG00 phase-out?

The 50-meter variant (6ES7902-3AG00-0AA0) has a announced phase-out date of October 1, 2026. As of this writing, the 5-meter and 10-meter variants in the same series remain fully active with no announced discontinuation. However, if your design has a long production horizon, verify the lifecycle status of all three lengths on the Siemens Industry Mall before finalizing the BOM.