Securitron AQM20 User Manual
Page 3
AQM20 Series Power Supply continued
AQM20 Installation Instruction: Doc.#500-33010 Rev.A
Page 3 of 8
Maintenance
The power supply and stand by battery(s) should be tested at least once a year as follows:
1. Check LED’s for normal state. AC ON Green, DC #1 ON Red, and DC #2 ON Red.
2. Check output voltage with normal load. DC Output #1 and DC Output #2 should read between 13.60 and
13.80vdc.
3. Disconnect AC input. AC LED should be off, DC Output LED’s #1 and #2 should be ON.
4. Check DC Outputs #1 and #2 to be above 12.0vdc. This checks standby batteries to be operational. Sealed
lead acid batteries have a typical life of 3 to 5 years.
5. Re Apply AC and verify AC LED ON.
Battery Selection
The table below shows typical standby time in hours for various loads and batteries. The table works for either
12vdc or 24vdc. The AQM20 was evaluated at UL with a 7AH sealed lead acid battery with a 1 hour stand by.
Approximate Battery Standby Time Table with a reserve of 3 Amps for 5 minutes for Alarm
Total Output
Amps
4Ah Battery
Standby
7Ah Battery
Standby
12Ah Battery
Standby
24Ah
Standby
40Ah
Standby
.5A
5.5 Hrs
12 Hrs
20 Hrs
40 Hrs
65 Hrs
1A
2.5 Hrs
5 Hrs
9 Hrs
19 Hrs
32 Hrs
1.3A
2 Hrs
4 Hrs
7.2 Hrs
15.5 Hrs
24 Hrs
2A
1 Hrs
2 Hrs
5 Hrs
10 Hrs
15 Hrs
3A
.5 Hrs
1 Hrs
3 Hrs
6 Hrs
9.5 Hrs
4A
.5 Hrs
.8 Hrs
2 Hrs
4 Hrs
8 Hrs
5A
NA
.6 Hrs
1.4 Hrs
3 Hrs
7 Hrs
6A
NA
.4 Hrs
1 Hrs
2 Hrs
4 Hrs
The recharge table below gives approximate recharge times for different loads and battery sizes. The table is based on
batteries depleted to battery cut-off and recharged back to approximately 90% capacity.
Ordering Guide with fuse sizes
Part Number
Description
AQM20
AQM20 Power Supply Charger Module Mounted in a 14” x 14” x 4.75” Enclosure
AQM20-8F
AQM20 with PDB-8F (fuses) Distribution Module
AQM20-8C
AQM20 with PDB-8C (circuit breakers) Distribution Module
AQM20-16F
AQM20 with two PDB-8F (fuses) Distribution Modules
AQM20-16C
AQM20 with two PDB-8C (circuit breakers) Distribution Modules
AQM20-8F8R
AQM20 with Smart Fan and PDB-8F8R Supervised Distribution Module (Fuses)
CAUTION Reduce the risk of fire replace fuses as marked
Note: Keep a minimum space of ¼” between Power Limited Outputs and non Power Limited wiring