
Recharge cycle
AC ON - Battery charging begins and AC Restoral Reports sent.
13.4 V - Battery Restoral Report sent. Battery float charged.
Further information
Refer to Powered outputs, page 18.
B520 Auxiliary Power Supply
The optional B520 Auxiliary Power Supply Module provides up to 2 A of 12 VDC standby
power for Fire and Burglar applications. For Burglar applications, an additional 2 A of alarm
power is available, allowing 2 A of standby current and up to 4 A of alarm current. You can
connect more than one module to the control panel.
The B5512 control panel supports up to 4 modules, while the B4512 supports up to 2
modules.
Connect B520 Auxiliary Power Supply Modules to the SDI2 bus on the control panel using
terminals PWR, A, B, and COM. This section includes basic installation instructions. Refer to
the Auxiliary Power Supply Module (B520) Installation Guide (P/N: F01U215240) for complete
installation instructions and for the B520 Auxiliary Power Supply Module Battery Standby Chart
for battery standby time calculations.
SDI2 address settings
Notice!
The module reads the address switch setting only during power up. If you change the
switches after you apply power to the module, you must cycle the power to the module in or-
der for the new setting to be enabled.
For single-digit address numbers 1 to 9, set the tens switch to 0 and the ones digit to the
appropriate number. If multiple B520 modules reside on the same system, each B520 module
must have a unique address.
Figure 4.2: Address switches set to 2
Supervision
The control panel supervises B520 Auxiliary Power Supply Modules on the SDI2 bus.
With any failure to receive an expected response from an SDI2 module, all keypads show in a
system fault display. The control panel sends a module trouble report to the central station (if
configured for module trouble reports).
Auxiliary power supply trouble conditions
Each auxiliary power supply module on the SDI2 bus monitors several conditions including AC
status, battery status, over current status, and a tamper input. Each of these conditions
produces a unique system trouble condition at all keypads. The control panel sends a module
trouble report to the central station (if configured for module trouble reports).
When the control panel shows a generic trouble condition for a SDI2 bus power supply
module, it could mean one of several non-serviceable things has occurred; low power output,
module firmware flash error, or battery charger circuit failure.
4.3
4.3.1
4.3.2
4.3.3
Control Panels Introduction | en 15
UL Installation Instructions 2013.01 | 04 | F01U265448
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