3
The features of the TrueAlert Power Supply are:
Three Signaling Line Circuits.
The TPS provides uninterruptible power and control to three
separate channels of TrueAlert addressable notification appliances. Each channel is referred to as
a Signaling Line Circuit (SLC) and is power limited, power limited is defined in NFPA 70
(National Electric Code). The SLCs can be either Class B (Style 4) or Class A (Style 6). Class A
requires the installation of a Class A adapter board. All SLCs are monitored for short and open
circuits.
24VDC AUX Power.
Provides up to 2 A of 24 VDC auxiliary power for use by the
option cards.
Internal Battery Charger.
Charges up to 50 Ah (ULC-S527) or 110 Ah (UL-864 Listing)
batteries connected to the power supply. The charger circuitry provides status monitoring of
battery connection, input power, and Earth faults.
Figure 1. Overview of TPS
Continued on next page
Introduction to the TPS
Overview
SLC 1
SLC 2
SLC 3
Battery
Terminals
LEDs
A to E
DIP Switches
SW1 to SW8
LEDs 1, 2, and 3.
Each Corresponds
to an SLC
Trouble Scroll
Push Button
Earth Fault
Jumper
AUX Power
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