Technical description
6 Communication
6.1 Communication ports
VM50.EN004
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167
6.
Communication
6.1.
Communication ports
The relay has one communication port. See Figure 6.1-1.
There is also one optional communication module slot in the
rear panel.
Front
panel
in
use
LOCAL
PORT
EXTENSION
PORT
REMOTE
PORT
RS-232
USB
D-
D+
GND
FRONT PANEL
COMMUNICATION PORTS
Communication
P
orts
50
Communication
option
ETHERNET
PORT
Ethernet
1
2
3
4
Figure 6.1-1. Communication ports and connectors. The DSR signal from the
front panel port selects the active connector for the RS232 local port.