TEC247 Fire & Extinguishant Control Panel
– INSTALLATION & OPERATION MANUAL
DOC NO. PRMAN-0003 TEC247 Rev 04.12 191209.docx
- 6 -
E. &O.E.
4.3
27.5 V DC WIRING
The motherboard of the control panel is supplied with 27.5 V DC from the power supply.
In addition, the operating status of the power supply is communicated to the control panel via a communications
lead. This wiring harness is fitted as per FIGURE 5 27.5 V DC Wiring Harness.
The 27.5 V DC output on the power supply can also be used as an
AUX Supply Output
by means of wiring the
Output GND (negative)
and
VCC (positive)
to your auxiliary device.
FIGURE 5
27.5 V DC WIRING HARNESS
4.4
FAULT INDICATIONS
The power supply continuously monitors the AC supply, battery connection, battery charging voltage and output
supply voltage, and will bring up the appropriate Fault conditions should these be outside of specifications. These
faults will be indicated by the respective LEDs on the Power Supply PCB - see FIGURE 6:
FIGURE 6
PSU LED INDICATIONS
▪
AC Fault
The AC Fault LED, Supply Fault Relay and General Fault Relay activates. When the Fault is cleared, indications
and relays restore immediately.
▪
Load Test
The Load Test LED is on for 30 seconds whilst test is conducted, battery charger is switched off (successful test =
Normal, failed test = Battery Fault). First load test takes place 10 minutes after start-up and every 4 hours
thereafter.
▪
Charger Fault
The Charger Fault LED and General Fault Relay activates. When the Fault is cleared, a panel reset is required to
restore indications and relays, or alternatively a hard reset of the PSU.
▪
Battery Fault
The Battery Fault LED and General Fault relay activate. When the Fault is cleared, a panel reset is required to
restore indications and relays, or alternatively a hard reset of the PSU.
▪
Output Fault
The maximum continuous operating output current is 1.2 A. Should you exceed 1.2 A, two modes are provided to
protect the output, or to provide additional current, depending on the amount of current draw:
▪
Boost Mode
-
Should the current draw exceed 1.2 A, the 24 V DC Output Fault LED will flash and the battery charger circuit
will be shut down.
-
If the 24 V DC output current draw exceeds 1.2 A, but is less than 1.8 A, for more than 10 minutes, the
General Fault relay and the 24 V DC output LED will be on solid. DC Supply Fault Output will be 0 V DC.
