12
template is enclosed with the important papers shipped with the panel, and
may be used to locate the mounting holes. Attach the housing to a wall, or
other solid support, using only these holes. This unit must not be mounted by
drilling or punching holes in the inside of the housing. Metal shavings, or
other foreign objects, may cause damage to the panel’s circuit boards. The
damage created would, of course, not be covered by the manufacturer’s
warranty.
Mount the panel with at least #10 screws through all four holes. Make sure that
the screws are driven in fully and that the mounting surface is strong enough to
support the panel’s weight.
2-5
Wiring Connections
2-5.1
This control panel is designed to operate from 120 VAC power at 50/60 Hz. The
power circuit must be able to supply at least 120 VA to the panel. This supply
circuit must include a disconnect device or switch located within easy
reach adjacent to the panel’s location. This component must be clearly
labeled as the disconnect device for the panel.
Use 12 or 14 AWG, stranded wires to provide the 120 VAC power to the control
panel. Although the panel uses less than 0.5 Amps of operating current,
extremely long lengths of wiring between the service breaker and the panel could
result in large voltage drops occurring across the wire lengths. If long lengths of
wiring are required, use 12 AWG wiring for the supply circuit.
The power connections are made on the Power Supply/Relay P.C. board. Fig.
3, page 13, shows an internal, bottom view of the assembled panel. Use this
figure to locate the Power Supply/Relay board. Fig. 4, page 14, shows the
location of the power terminal strip, TS1, where these connections are made. L1
is for the 120 VAC hot lead, while the 120 VAC neutral wire connects to L2.
The four ground points on terminals 3 through 6 can be used to attach the
circuit earth ground.
2-5.2 Connections between the panel and the transmitters require a five conductor,
shielded cable. This cable should have 18 AWG, stranded conductors. Each
conductor should have a distinct color to avoid any wiring errors at either the
panel or transmitters. This cable provides both the operating voltage to the
transmitters and the digital communication lines between each transmitter and
the control panel.
The transmitters can be connected in a parallel fashion. This connection
scheme is sometimes referred to as a daisy chain connection. The farthest
transmitter should be at, or less than, 1000 feet from the panel. The panel
contains two terminal strips for connecting the transmitter cable. As many
as four cables can be connected at the control panel. Fig. 5, page 15,
shows the location of these terminal strips. The function of each terminal
point is written directly next to each point. Table 2-5.2, on page 16,
explains the function of each terminal point on these strips.
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