Led Diagnostics; Terminal Identification - Altronix AL175UL Installation Manual

Red (DC) Green (AC)
ON ON
ON OFF
OFF ON
OFF OFF
Terminal Legend
TRG1 & TRG2
LOCK +
STRIKE +
NC, NO, C
AUX +
COM –
FACP
+ BAT –
AC FAIL
NC, C, NO
- 4 -

LED Diagnostics:

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

Terminal Identification:

Function/Description
Connects to the normally closed outputs of an access control or fire alarm relay.
These terminals control [LOCK +], and [STRIKE +], as well as AL175UL output relay
contacts [NC, NO, C].
Provides DC output voltage when [TRG1] and [TRG2] are shorted together and are
typically used to power Mag Locks.
Provides DC output voltage when [TRG1] and [TRG2] are unshorted and are typically
used to power Electric Strikes.
Isolated dry form "C" contacts. Shorting [TRG1] and [TRG2] together causes these
contacts to switch. They are typically used for controlling multiple AL175ULs with fire
alarm tie-in (Fig. 5 and Fig. 6, pg. 7).
Continuous positive (+) DC power output voltage.
It is not affected by TRG1, TRG2 operation.
Common negative (–) output (ground).
Spare wiring terminal used for fire alarm tie-in application (Fig. 4, pg. 7).
Stand-by battery connections.
Indicates loss of AC, e.g connect audible device or alarm panel.
Relay normally energized when AC power is present. Contact rating 1A @ 28VDC.
AL175UL Installation Guide