KMC Controls BAC-5831 - Manual

HPO-0070/0071 1 Installation Guide
Introduction
The HPO-0071 is an eight-circuit transient suppres-
sor board used on the inputs of digital controllers,
and the twelve-circuit HPO-0070 is used on the
outputs. When properly installed and wired, these
board can protect the digital controllers from high-
voltage transients.
These boards are required on every controller
involved in smoke control applications. (See
Smoke Control Manuals 000-035-08 (BACnet) and/
or 000-035-09 (KMDigital) for more information.)
If such a controller has more than eight inputs, an
additional HPO-0071 will be needed.
Installation Guide
I/O Transient Suppressor Boards
HPO-0070/0071
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Illustration 1—Snap Track Installation
Illustration 2—Input Wiring with HPO-0071
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Installation and Wiring
1. Mount the (included) Snap Track in a suitable
enclosure. To avoid damaging or shorting the
board’s wiring, be sure the mounting screw heads
do not exceed the maximum height indicated in
Illustration 1. One or two washers underneath the
track may help provide enough flex in the track to
more easily install the board.
2. Slide the boards into the Snap Track.
NOTE: Orienting the unprotected terminals on the
same side as the incoming or exiting wiring
may simplify the wiring process.
2. Connect the incoming or exiting wires to the
unprotected sides of the boards. See Illustrations
2 and 3.
3. Connect the controller wiring input and output
pairs to the corresponding protected terminals of
the boards. If the controller has more than eight
inputs, start over with Terminal 1 of the second
input board going to Input 9 of the controller.
NOTE: The SC terminals are used instead of GND
only if the controller has HPO-6701 triac
or HPO-6703/6705 relay output override
boards installed.
CAUTION
To avoid damaging or shorting the board’s
wiring, be sure the mounting screw heads
do not exceed this maximum height.
Optional
Washers