Edwards Signaling FireShield 10 Zone - Manual (Page 17)

Installation
FireShield Technical Reference Manual 2.7
Installing the Power Expander
Transformer
The Power Expander Transformer (XTR3A120, XTR3A230)
provides additional primary AC power to increase the NAC
capacity for the ten-zone panel. It provides an additional 2.5
amps of NAC current. The Power Expander Transformer
installs in the cabinet with four nuts (provided). The input side
of the Power Expander Transformer connects to 120 Vac or
230 Vac through the Dual Transformer AC Wiring Block. Its
output connects to the circuit board (J4) with the attached
cable harness. One Power Expander Transformer can be
installed in the 10-zone panel.
Note: The Power Expander Transformer does not work with
the three-zone or five-zone panels.
Specifications
Power input
120 Vac @ 60 Hz (P/N XTR3A120)
230 Vac @ 50/60 Hz (P/N XTR3A230)
Operating environment
Temperature: 32 to 120 °F (0 to 49 °C)
Humidity: 93% RH, noncondensing
Fuse: Primary winding has thermal current protection and is
not field serviceable
Note: Input current rating is included with the overall ten-zone
ratings.
Installation instructions
Caution: Make sure all power is disconnected from the panel
before installing. Observe static-sensitive handling practices.
To install the Power Expander Transformer:
1. Position the Power Expander Transformer so that the
mounting holes align with the four mounting studs on the
control panel cabinet.
2. Secure the transformer to the panel using the four nuts
provided.
3. Connect the cable harness to J4 on the circuit board. Push
the cable harness until the connector clicks into place.
4. Connect the incoming power wires to the dual transformer
AC wiring block above the existing transformer.
5. Secure the incoming power wires to the side of the control
panel with the tie strap provided.
J4
Main
controller
board
Cabinet
Main
transformer
XTR
(optional
transformer)
Plug connector
TB1
Mounting
studs
Tie wrap
mounts
From 120 Vac, 15 A, 60 Hz
Dedicated branch circuit
—OR—
From 230 Vac, 15 A, 50/60 Hz
Dedicated branch circuit
L N
Main AC
wiring block
and fuse
holder
Fuse
Dual transformer
AC wiring block
N2 L2
N L
Power Expander Transformer installation and wiring