9.3.6.4
RS-485 Half-duplex to Third-party Device (Slave)
•
A (TX/RX+) to third-party device (Slave) TX/RX+
•
B (TX/RX-) to third-party device (Slave) TX/RX-
•
C – Jumper from A
•
D – Jumper from B
Note
Put A/B termination
In
, but leave C/D termination
Out
on the terminal board.
Protocol RS-485 Slave Device Side TX/RX+
TX/RX-
N/A
N/A
SCOM
RET
SSCA SIDE
Media converter pins
DATA +
DATA -
JUMPER
JUMPER
SGND
CHANNEL 1
RS-485
28
30
28-32
30-34
26
36
CHANNEL 2
RS-485
27
29
27-31
29-33
25
35
CHANNEL 3
RS-485
15
17
15-19
17-21
13
23
CHANNEL 4
RS-485
16
18
16-20
18-22
14
24
CHANNEL 5
RS-485
4
6
4-8
6-10
2
12
CHANNEL 6
RS-485
3
5
3-7
5-9
1
11
Channel
A (TX/RX+)
B (TX/RX-) C (Jumpered
with A)
D (Jumpered
with B)
Jumper (JP#A) Jumper (JP#B)
CHANNEL 1
28
30
32
34
JP1A - IN
JP1B – OUT
CHANNEL 2
27
29
31
33
JP2A - IN
JP2B – OUT
CHANNEL 3
15
17
19
21
JP3A - IN
JP3B – OUT
CHANNEL 4
16
18
20
22
JP4A - IN
JP4B – OUT
CHANNEL 5
4
6
8
10
JP5A - IN
JP5B – OUT
CHANNEL 6
3
5
7
9
JP6A - IN
JP6B – OUT
PSCA Modbus Master (Serial Communication) Module
GEH-6855_Vol_II System Guide 299
Public Information