Battery Troubles - DSC Maxsys PC4020 System Manual

Battery Troubles

If a zone has a low battery trouble, then that zone does
not report in with a zone supervisory within the
"supervision time". The zone will not go into alarm. This
has been included to reduce the possibility of a false
alarm from batteries that do not get changed in the zone,
and then the zone going into sensor fault.
Restoring Battery Troubles
A wireless zone battery trouble will only be restored after
that zone has been Tampered and Restored. This will
allow the batteries to be changed without multiple Battery
trouble/Battery restoral transmissions taking place. In
order for the batteries to be changed the cover must be
removed from the back plate (tampering the zone). When
the tamper is restored and the zone sends a battery
trouble restoral (as well as the tamper restoral) signal to
the PC4164, the battery trouble will clear.
Default Serial Numbers
Once this selection has been made the LCD will display
the message "Confirm Default Press
any other key. Once the [ ] key has been pressed the
LCD will display the message "Resetting ". All RF zone
signatures will have been erased from the PC4164.
Note: Deleting the RF signatures from the PC4164 will
not remove the zone(s) from the partition
assignment(s).
Combus Power and Operation
The PC4020 main board can provide up to 500 mA to
power modules, keypads and devices. A PC4204 power
module is required when additional current is needed
either for powering detection devices or operating bells
and sirens. The PC4204 requires its own transformer and
battery and can provide up to 1.5A at 12 V
on the module provide form C switched outputs with
contact ratings of 3 amps @ 12 V
for a variety of programmable options. When used to
repower the Combus the PC4204 must be wired in
accordance with the instructions supplied with the unit.
Use of a power source other than the PC4204 power
supply module to supply additional power to the PC4020
system is not recommended for the following reasons:
If the main panel loses communications with a module,
within a maximum of 30 seconds the panel will perform a
system reset in which power to the Combus is removed.
Five seconds later power is reapplied and the panel will
attempt to communicate with the module. If the panel is
unsuccessful communicating with the module it will
display and report a Combus communications fault.
". To abort press
. Four relays
DC
(10 amps @ 120 VAC)
DC
When the main panel performs a reset, relay 1 when
programmed for "Combus POWER" will open. This will
disconnect the power supplied to the modules, resetting
them so that communications to the main panel are
reinitialized.
For example, if the microprocessor on the module has
been scrambled due to a transient, the PC4020 will power
down the Combus, the PC4204 will mimic the PC4020 and
cut off its power supply to the module. The module will be
powered down. When the PC4020 returns power to the
Combus, the PC4204 will reconnect its power supply, and
the power to the module will return. Because the module
was powered down and powered up, the module is now
reset, and can communicate with the PC4020.
If a power supply other than a PC4204 was used, the
module would never power down, never reset, and the
module will stay off line requiring the attention of service
personnel.
CAUTION: When used to power a module, the "RLY 1
COM" terminal of the PC4204 must be connected to
the "RED Combus" terminal of the module only. The
positive (RED) conductor of the Combus must be left
unconnected to the module that is powered by the
PC4204. The "BLK Combus" of the module should be
run common to the negative ("BLK") of the Combus.
Use of a power source other than the PC4204 power
supply module to supply additional power to the
PC4020 system is not recommended.
The Combus is a four conductor cable to which all modules
and keypads are connected in parallel. Connections to the
Combus do not have to be home-run. For example if a
storage building had an 8 zone expander (PC4108) and a
keypad (LCD4500) located in it, the zone expander and
keypad could be spliced together and run back on a single
4 wire cable to the nearest point on the Combus.
R
B
PC4020
Y
G
Testing The Combus
To test the Combus for a low voltage condition, connect
all devices to the system (include any motion detectors,
glass break detectors, etc.) and enroll each of the
modules. Exit installers mode and allow the system to run
normally for 5 -10 minutes. This will allow time for any
modules that may have battery troubles time to report. If
after this time there are any battery troubles be sure that
the batteries are "good" by disconnecting the suspect
battery and placing a voltage meter across the battery
5
KEYPAD
R B Y G
COMBUS
R
B
PC4108
Y
G