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
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