Issue
What is the communications cable between the 984 Compact A120 PLC to a Magelis XBTRT511?

Product Line
Compact 984, Magelis XBTRT511, Vijeo Designer Lite

Resolution
If the Compact 984 PLC has a RJ45 comm port, use the XBTZ9711 + XBTZG939.

If the Compact 984 PLC has a DB9 comm port, use the XBTZ9710 + XBTZG939 adapter.

The Compact PLC series 258/265/275/285 have a RJ45 comm port. All others Compact have a DB9 comm port.