Power connections – Watlow Relay Interface Board User Manual
Page 11
Relay Interface Board Installation Guide
7
Power Connections
Choose one of the following options for installing and configuring the jumper on
JU1 appropriately for your I/O board.
•
Option 1: 8, 16, and 24-module I/O boards only: Jumper JU1 in position A to
get power from the controller to the I/O boards via the ribbon cable.
•
Option 2: 8, 16 and 24-module I/O boards only: Jumper JU1 in position B to
disconnect the controller power supply. Jumper the I/O boards to get power from
the ribbon cable. Use an external power supply to provide power to TB1. This
arrangement powers the I/O boards through their ribbon cables.
•
Option 3: For any I/O board: Jumper JU1 in position A. Set the I/O board for
an external power supply. Then connect power from TB1 to the terminals on the
I/O board.
•
Option 4: For any I/O board: Jumper the I/O board for an external power sup-
ply. Wire an external power supply directly to the terminals on the I/O board.
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