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6
I/O Sentinel
®
4 Installation and Operation Manual
INSTALLATION
Relay Connections
Each of the four control relays are supplied configured as normally open dry con-
tacts. To configure as normally closed contacts, follow the steps below.
a - Remove all connections from the unit.
b - Turn the unit over and remove the screw on each side of the unit.
c - Gently pull the top and bottom covers apart.
d - Locate the following jumpers: JPR5 for K1, JPR6 for K2, JPR7 for K3 and
JPR8 for K4. The unit is shipped with all relay jumpers in the N.O. (nor-
mally open) position. To change the desired relay to normally closed,
move the appropriate jumper from the N.O and C position to the N.C. and
C position.
e - When finished, re-assemble the unit.
f - Re-connect all connections and apply power to the unit.
External equipment to be controlled should be connected to the terminals labeled Kx
and Kx (where x is the control relay number) for relays one through four.
NOTE: If mechanical latching relays are required, we suggest the Broadcast
Tools LR-5 (4PDT & SPST) mechanical latching relay.
Relay LED’s Illuminate when the appropriate relay is activated.
Power/HB LED
The flashing LED Indicates valid power and that the control processor is operating.
