Federal Signal Corporation UNISTAT USI Series Instruction Sheet page 5

D. Electrical Connections.
The UniStat™ comes assembled from the factory. If the unit has not already
been disassembled previously for mounting, perform the following steps. Reference
figure 1 for additional information.
1. Remove the lens by twisting counter-clockwise (as viewed from the top)
until it unlocks. Lift the lens upward and off the base unit, retain O-ring.
2. Remove the two Phillips head #6 screws and disassemble the sleeve from
the base. The printed circuit board with LED array will remain attached to the sleeve
allowing access to the terminal block. Retain O-ring for sleeve.
3. The electrical connections can now be made to the connector using 18 or
20AWG solid copper or 20AWG stranded wire.
To avoid electrical shock hazards, do not connect wires when power is applied.
4. Feed the power and control wires through the NPT opening in the
bottom of the base. Connect the wires to the connector as indicated in figure 4, table 2.
Reference Table 1 for color and function selection.
5. Before reassembling, make sure the O-ring is in place between the base
and sleeve. To reassemble the base unit, first attach the sleeve onto the base by sliding
the printed circuit board into the channels on the base. Fasten the sleeves onto the base
by reinstalling the screws removed in step 2.
6. Reassemble the lens onto the base unit, and place the O-ring between
the lens and base. Apply a clockwise twisting motion to the lens until it locks into place.
7. Test the UniStat™ to ensure that it operates as intended.
III. SERVICE.
Federal Signal will service your equipment or provide technical assistance with
any problems that cannot be handled locally. Any units returned to Federal Signal for
service, inspection, or repair must be accompanied by a Return Material Authorization.
This R.M.A. can be obtained from the local distributor or manufacturer's representa-
tive. At this time a brief explanation of the service requested, or the nature of the
malfunction, should be provided.
Address all communications and shipments to:
Electrical Products
Service Department
Signal Division
Federal Signal Corporation
2645 Federal Signal Drive
University Park, IL 60466-3195
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