
Selecting a backup battery
While not required, a backup battery is recommended in case of power outages. For PoE power backup, refer to
the manufacturer's instructions for your PoE injector or switch. When using an external supply, 12V supplies
require one 12V backup battery. 24V supplies require two 12V batteries in series. The size of batterydepends
on your setup and how long you want to power the system.
Table 1 Example power requirements (24V)
Single Door Controller .3A
Smart Reader (2) 0.25A
Locking hardware (while engaged) 0.125A – 0.25A
Assuming an external 24V power supply, an SDC configured with two Avigilon readers and locking hardware
uses about 1.1 Amps. To keep the system running for 3 hours with all entries engaged, you need 1.1A x 3 hours
= 3.3 AH, so two 12V 4AH sealed lead acid (SLA) or gel cell batteries in series.
Mounting options
Install the Avigilon SDC on a single or double gang box, or on drywall.
Mount on a standard US 1-gang box
1. Use two 6-32 screws (a) to attach backplate (b) to gang box.
Recommended:Use the drywall screws (c) and anchors on drywall for added stability.
2. Snap on main housing (d) to backplate (b).
3. On the right side of the main housing (d), ensure that the two edge clips (h) fit into their respective
notches on the backplate (b).
4. Press firmly on the main housing (d) to snap into place.
5. Partially unscrew the pre-installed M4 set screw (e) to secure main housing (d) to backplate (b).
6. Use the cable slot (f) to hold cables while wiring.
7. Snap on front cover (g).
Note: For a double gang box, follow the directions above, using additional 6-32 screws.
Installation 9