It is recommended that two batteries are used. These batteries must be of the same type and
capacity.
1. Install the batteries in the battery compartment.
2. Secure each battery using the battery straps provided, ensuring the strap is threaded through the
battery strap holes at the back of the battery and around the battery.
3. Secure the two ends of the battery strap at the front of the battery, ensuring the battery strap is
firmly tightened.
4. Connect the leads from the SPCP355.300 Smart PSU to the batteries in the following order:
- Connect the positive (red) wire first.
- Connect the negative (black) wire second.
DANGER: When removing the battery leads, always disconnect the negative (black) lead before
disconnecting the positive (red) lead.
7.1.2.2 Testing Battery Voltage
The SPCP355.300 Smart PSU performs a load test on each battery by placing a load resistor across the
battery terminals and measuring the resultant voltage. This battery test is performed every five seconds.
7.1.2.3 Deep Discharge Protection
If mains power to the SPCP355.300 Smart PSU fails for a prolonged period, each battery supplies power
to the PSU 12V DC power outputs for a finite time. The batteries eventually discharge. To prevent a
battery discharging beyond recovery, the SPCP355.300 Smart PSU disconnects the battery if the
measured voltage drops below 10.5V DC. The battery can then be recharged after the mains power is
restored.
7.1.2.4 Battery Stand-By Times
See Calculating the battery power requirements on page364 for the battery stand-by information.
7.1.3 Wiring the X-BUS Interface
The X-BUS interface connects expanders and keypads to the SPC controller. The X-BUS can be wired in
a number of different configurations, depending on the installation requirements.
The following table lists the cable types and distances recommended:
Maximum cable length=(numberof expanders and keypads in the system) x (maximum cable
distance for each cable type)
Cable Type Distance
CQR Standard Alarm Cable 200m
UTP Cat-5 Solid core 400m
Belden 9829 400m
SPC4xxx/5xxx/6xxx – Installation & Configuration Manual Smart PSU
© Vanderbilt 2018 62 A6V10276959-d
11.2018
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