Figure 14: Wiring diagram for the power supply
Callout Description
1 Black wire
2 Red wire
3 Battery 12V
4 Jumper
5 Automatic Isolating Switch
Thermal probe
The control panel supports the KST thermal probe.
The probe optimizes the battery charging process
by regulating the charge voltage in accordance with
the battery temperature.
Work carefully through the following instructions.
Refer to Figure 14, Figure 15 and Figure 18.
Connecting the thermal probe
to the control panel
Note: The panel comes with a KST thermal
probe installed to connector 10 on the power
supply. See Figure 4.
1. Use the trimmer 9 in Figure 4 to adjust the
voltage. Refer to the graph in Figure 15 and
Table 6.
1. For example: if the probe is located in
an ambient temperature of 20°C, the
output voltage must be 27.489V.
Important: The probe temperature
must be considered during voltage
adjustment.
2. When the voltage adjustment is complete,
attach the thermal probe to the battery. Refer
to Figure 18.This will provide an optimum level
of thermal conductibility.
3. Connect the batteries to the battery terminal
on the panel main board.
CAUTION:
Before removing the probe,
disconnect the battery from the
main board. Removing the thermal
probe causes the switching power
supply voltage to rise to 27.6 V or
greater. This damages the battery.
If you are disconnecting the battery and you are
required to work without the thermal probe (EN54
approval will be lost), adjust the switching power
supply output voltage using the trimmer (46) as per
Table 6. Reconnect the batteries only if their voltage
equates to 27.6 Vdc or less.
To verify battery efficiency, the charger circuit
measures the internal resistance of the batteries. To
ensure you receive an accurate reading, use only the
cables supplied; longer cables or those that have
an insufficient section may incorrectly simulate an
inefficient battery.
FC503 and FC506 Addressable Fire Control Panels 31
Johnson Controls - CONFIDENTIAL
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