56
GENERAL
D400 SUBSTATION GATEWAY USER’S MANUAL
RS-485 CONNECTIONS
CHAPTER 4: CONNECTING TO DEVICES AND NETWORKS
NOTE
The terminal block positions are numbered from 1 to 10 starting from the bottom of the
card.
4-Wire connections
See “RS-485 adapter” on page 37 for configuration options.
To connect RS-485 4-
wire type devices to
the RS-485 Adapter
Use the following wiring connection:
NOTE
Before wiring devices, ensure that the RS-485 Adapter is configured to 4-wire mode (see
“RS-485 adapter” on page 37).
Figure 32: RS-485 4-wire devices - wiring connection
Channel 2
6
TX2+
IN/OUT
7
TX2
−
IN/OUT
8
FGND 2
Shield
9
RX2
−
-
10
RX2+
-
RS-485 Channel
Position Number
2-Wire
Function
Signal Flow
Device 1
RX+ RX-
TX+ TX- GND
Device 2
RX+ RX-
TX+ TX- GND
Device 3
RX+ RX-
TX+ TX- GND