15
Supervised Alarm / Relay / Power Expansion Unit
POWER CONNECTIONS
AC Power Source Grounding
The Expansion Unit main circuit board has built-in surge sup-
pression devices. The surge suppressors require a good earth
ground connection to operate effectively.
WARNING
Verify that the AC source voltage is switched off at
the breaker panel before proceeding with connec-
tions.
AC Power
The incoming AC source voltage connects to the AC Input
Power Terminal Block located in the lower middle of the Expan-
sion Unit cabinet (see Figure 9).
Run the AC power wiring through a knockout normally hidden
by the insulation cover. Do not place any other wiring in this
area.
First, secure the Green or Green/Yellow "Ground" wire to the
center terminal of the AC Input Terminal Block. Then secure
the White "Neutral" wire to the left terminal. Finally, secure
the Black "Line" wire to the right terminal.
After the wiring is completed, use a cable-tie to secure the wires
to the cable-tie mount (provided) located below the AC Input
Power Terminal Block.
NOTE:
Use of a dedicated, unswitched AC power
source results in optimal performance with minimum
interference.
Table 1 lists the incoming AC source voltage con-
nections to the AC Input Power Terminal Block.
NOTE:
Knockouts for conduit Fittings are located on the back
of the metal housing and can be used if "hidden cable" installa-
tion is required.
IMPORTANT SAFETY REQUIREMENT:
If the enclo-
sure door is removed, the Ground Strap may be unbolted--but
MUST be REATTACHED after installation or service is com-
pleted. Failure to Reconnect the Ground Strap may increase
the Risk of Electric Shock.
NOTE:
Because of the Low Battery Voltage Disconnect fea-
ture, the Expansion Unit will not start to operate until mains
(AC) power is connected.
POWER CONNECTIONS
Figure 9 - AC Input Power Terminal Block
Neutral - White
AC Power Cable
Cable Clamp
Insulating cover
pulled away
Incoming AC
Wire Color
AC Input Terminal Block
Line
Black
L
Neutral
White
N
Table 1- AC Input Power Terminal Block Connections
Ground
Green
Cable-tie secured to cable-tie mount
Line - Black
Ground - Green
