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WHEN INSTALLING THIS PRODUCT...
1. Read these instructions carefully. Failure to follow
them could damage the product.
2. Refer to Fig. 2 and 3 for proper system wiring.
3. Installer must be a trained, experienced flame safe-
guard technician.
4. After installation, check out the product per instruc-
tions in this specification sheet.
IMPORTANT: This equipment generates, uses and can
radiate radio frequency energy. If not installed and
used in accordance with the instructions, it may
cause interference to radio communications. It has
been tested and found to comply with the limits for a
Class A computing device (part 15 of FCC rules)
which are designed to provide reasonable protec-
tion against such interference when operated in a
commercial environment. Operation of this equip-
ment in a residential area may cause interference; in
which case, users at their own expense may be
required to take whatever measures are required to
correct this interference.
HUMIDITY
Install the Keyboard and Display Module where the
relative humidity never reaches the saturation point. The
Keyboard and Display Module is designed to operate in a
maximum 85% RH continuous, noncondensing moisture
environment. Condensing moisture may cause improper
Keyboard and Display Module operation.
VIBRATION
Do not install the Keyboard and Display Module where
it could be subjected to excessive vibration, 0.5G continu-
ous maximum.
WEATHER
The Keyboard and Display Module is not designed to
be weather tight; if it is installed outdoors, it must be
protected.
MOUNTING THE KEYBOARD AND DISPLAY
MODULE
NOTE: For installation dimensions, see Fig. 1.
1. The Keyboard and Display Module can be mounted
on the door panel of an electrical enclosure.
2. Select the location on the door panel; be aware that
the Keyboard and Display Module extends 1.4 inches
behind its mounting surface.
3. Using the Keyboard and Display Module as a tem-
plate, mark the four screw locations. Drill the pilot holes.
Provide for an opening on the panel door for mounting, see
Fig. 1.
4. Secure the Keyboard and Display Module to the
panel with four no. 6 screws.
Fig. 4—Keyboard and display module mount-
ing.
WIRING
1. Refer to Fig. 2 and 3 for proper wiring.
2. Remove line voltage from the control panel by
opening the main disconnect, more than one disconnect
may be involved.
3. All wiring must comply with all applicable electri-
cal codes, ordinances, and regulations.
4. Recommended wire size and type:
a. Make the Keyboard and Display Module RS-485
ControlBus connections with Belden 8723 cable
or equivalent. The shield is connected to ground
at both ends.
b. The recommended wire size for the 24 Vac power
input is AWG No.18 wire insulated for voltages
and temperatures encountered in the application.
Suggested types include TW (60C), THW (75C)
and THHN (90C).
5. Recommended grounding practices—The Keyboard
and Display Module can be connected to any convenient
earth ground. The ControlBus shield is connected to ground
at both ends.
6. Recommended wire routing:
a. Do not route the ControlBus shielded cable in
conduits that carry line voltage circuits.
b. Avoid routing the ControlBus shielded cable
close to the ignition transformer leadwires.
c. Route the ControlBus shielded cable outside of
conduit if properly supported and protected from
damage.
7. The ControlBus requires a termination resistor on
the module farthest from the Chassis Module. This is
accomplished by connecting a 120 Ω 1/4 watt resistor
across a and b terminals of the ControlBus connector on
5
ST7700
INSTALLATION
Installation
63-2287—1
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