635-SERIES HARDWARE M ANUAL
Chapter-Page
2-42
Drawing is not to scale.
STEP-8 PINOUT GUIDE FOR RS-485 MULTIDROP
•
Relay Boards must be installed in a multidrop (daisy chain) configuration.
•
DO NOT USE A “STAR” CONFIGURATION ON THE RS485 SECTION.
Table 26: WIRING PINOUT FROM 635-DSI TO FIRST RELAY BOARD
DSI BOARD RS-485 (J5 / J6) FIRST RELAY BOARD RS-485 ON MULTIDROP
A
(pin 1)
to D+
B
(pin 2)
to D-
GND
(pin 3)
GND
Ground Drain wire at DSI END ONLY for this line segment
UNUSED
(pin 4)
- -
Use this pinout guide for the first Relay board on the multidrop.
Never wire more than one board to a DSI Section.
WIRING PINOUT RELAY BOARD
Table 27: WIRING PINOUT FROM ONE RELAY BOARD TO NEXT RELAY BOARD
RELAY BOARD RS-485
TO NEXT RELAY BOARD ON MULTIDROP
D+
to
D+
D-
to
D-
GND
GND
Ground Drain wire on shielding to one board
(do not ground both ends of the drain wire).
Use this pinout guide for each Relay board on the multidrop.
Only one (1) Relay Board can be wired to a Relay Board.
Never wire more than one board to another board.
