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

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

1 Hrs

2 Hrs

5 Hrs

10 Hrs

15 Hrs

.5 Hrs

1 Hrs

3 Hrs

6 Hrs

9.5 Hrs

.5 Hrs

.8 Hrs

2 Hrs

4 Hrs

8 Hrs

.6 Hrs

1.4 Hrs

3 Hrs

7 Hrs

.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