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EXTERNAL POWER SUPPLY (EPS) (AC SUPPLY)
The power supply has a three way terminal block for Live, Neutral and Earth connections, and is
protected by a 20mm anti-surge fuse rated at 230V, 315mA. A replacement fuse MUST be the same
type and rating.
Mains Earth is connected to the power supply screening and metal enclosure; but is isolated from the
0V output.
TAMPER OUTPUT
This voltage free output is connected to the Tamper Connector. These terminals will be shorted when
the tamper switch is closed.
FAULT OUTPUTS
Two voltage free fault outputs and LEDs are provided to monitor for External Power Supply (EPS) fault
and Auxiliary Power Supply (APS) fault:
Both Relay contacts open and all LEDs out = total power down.
12V POWER OUTPUT
Terminal blocks are provided to connect to the system. The “Rated Output” current is the maximum
that can be drawn from the PSU’s ‘Power Output’ terminals. This is shown in the ‘Rated Output’
section.
The ‘12V OK’ LED indicates that 12V is available from these terminal blocks.
AUXILLARY POWER SUPPLY (APS) (BATTERIES)
One battery connector is provided marked BATT1.
A battery MUST be fitted to the BATT1 connector.
This power supply is compatible with a 7Ah or 8Ah Sealed Lead Acid Gel battery.
EPS FAULT (MAINS)
APS FAULT (BATTERY)
Green LED goes out and Relay
contacts open if:
Green LED goes out and Relay
contacts open if:
AC power fault
Battery voltage lower than 10.8V
Unit powered down
Unit powered down
Thermal shutdown