Led Diagnostics; Terminal Identification - Altronix AL175ULB Installation Instructions

Red (DC) Green (AC)
ON ON
ON OFF
OFF ON
OFF OFF
Terminal Legend Function/Description
AC Low voltage AC input.
These input terminals are designed to connect to the normally closed outputs of an access control or
TRG1 & TRG2 fire alarm relay. These terminals control [LOCK+], and [STRIKE+], as well as AL175ULB output
relay contacts [N.C., N.O., C]
This terminal provides DC output voltage when [TRG1] and [TRG2] are shorted together and are
LOCK +
typically used to power Mag Locks.
This terminal provides DC output voltage when [TRG1] and [TRG2] are unshorted and are typically
STRIKE+
used to power Electric Strikes.
Isolated dry Form "C" contacts. Shorting [TRG1] and [TRG2] together causes these contacts to
N.C., N.O., C switch. They are typically used for controlling multiple AL175ULBs with fire alarm tie-in
(Fig. 4 and Fig. 5, pg. 4).
AUX+ Continuous positive (+) DC power output voltage. It is not affected by TRG1, TRG2 operation.
COM -- Common negative (-) output (ground).
FACP Spare wiring terminal used for fire alarm tie-in application (Fig. 3, pg. 4).
+ BAT -- Stand-by battery connections.
AC Fail Used to notify loss of AC e.g connect audible device or alarm panel relay normally energized when
N.C., C, N.O. AC power is present. Contact rating 1A @ 28VDC.
AL175ULB

LED Diagnostics:

Power Supply Status
Normal operating condition.
Battery backup is powering output.
No DC output.
Loss of AC. Discharged or missing stand-by battery. No DC output.

Terminal Identification:

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