Moeller DE4-COM-2X, Manual

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Engineering
GB-14
03/01 AWB823-1279-D/GB/F
RS 485 Interface Pin assignments
The RS 485-Interface can also be accessed using the 4-pin
plug-in screw terminals.
Figure 4: Plug-in screw terminals for the RS 485 interface
External power supply Pin assignments
If you want to supply the interface with an external voltage,
this occurs via a 2-pole plug-in screw terminal.
Figure 5: Plug-in screw terminals for the external power supply
71 72 88 89
Terminal Designation Input / output Comment
71 T/R(B) Input / output RS 485
72 T/R(A) Input / output RS 485
88 S-C – Capacitive screen to PE
89 S – Direct screen to PE
+ –
Terminal Designation Input /
output Comment
+ Vcc 24 Input External power supply
15 to 30 V DC
– GND 24 – 0 V potential for external
power supply