EMR3 Truck Installation Installing the Interconnection Box (IB)
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3. Run the power cable from the truck fuse block or ignition switch to the IB. Clamp the power wire at suitable
intervals between the power source and the IB.
Before connecting the truck power wiring, verify the following:
a.Electrical system has a negative ground.
b.Battery terminals and cables are in good condition.
c.Alternator current output is sufficient to supply EMR
3
System current requirement of 5 amperes.
Attach the wire from truck ground to the Ground terminal of the Power Side terminal block. Also attach the
wire from the truck’s Accessory (ACC) circuit to the V+ terminal of the terminal block.
4. Table 8 and Figure 22 show the IB intrinsically safe terminal wiring connections. Use Intrinsically Safe Side
knockouts (right side of IB under cover) for Display Head cable entries. The drain wire in each Display Head
cable must be connected to the adjacent chassis ground clamp.
IB POWER FUSE
A replaceable power fuse is located on the IB box’s printed circuit board - 5A, Slo Blo, Type T 5x20mm, Littlefuse
#218005 (V-R P/N 576010-973).
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