ADR-7000 / SAVER-7000 / GUARD-7
© 2017
– Telefire Fire & Gas Detectors Ltd
Revision 0.98 October 2017
– Page 84 of 87 –
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Note
TPS-34A Addressable Auxiliary Power Supplies should be installed as close
as possible to the devices they provide power to in order to reduce power
loss.
TPS-34A auxiliary power supplies should not be shared between multiple
control panels or between line cards on the same control panel. TPS-34A
auxiliary power supplies may be shared between the two loops of a single
ADR-3002C line card.
When are Auxiliary Power Supplies Needed?
Large fire detection and alarm systems that require high current 24Vdc power may be
expanded by installing TPS-34A auxiliary power supplies. These power supplies may be
used to add 24Vdc power to the system.
Auxiliary power supplies are requires if at least one of the following conditions are met:
Current draw from the 24Vdc outputs is more than 0.5A in quiescence mode or 1.5A
in alarm
The total power consumption of the control panel (the control panel itself and
devices attached and powered by it) is more than 4.0A in alarm
There is a requirement for batteries with more than 12AH capacity
Voltage drop to the last device fed by the 24Vdc output is more than 2V, or does not
allow high enough voltage at the last device to operate it
Auxiliary power supplies should be installed in the field as close as possible to the
devices that they supply 24Vdc to, thereby saving both cabling cost and power losses.
This provides high resilience as the power supplies are distributed and a problem with
one power supply will not affect the rest of the system.
There is no limit to the quantity of power supplies that can be added to the system, up to
hundreds of amperes.
The power supplies are fed from a 230Vac input and include a power supply, battery
charger, and control circuitry. Communication and reporting to the control panel is done
via the SLC, with the power supply occupies a single address.
The power supply can supply up to 4A during alarm. Please see the power supply
manual for further details.