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Installing the power expander transformer, Specifications, Installation instructions – Edwards Signaling FireShield 10 Zone User Manual

Page 17

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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

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