DP-PSUEN EN54-4 Fire Alarm Power Supply Series
– INSTALLATION & OPERATION MANUAL
DP-PSUEN Series Installation & Operation Manual Rev 11.1 220323.docx
E&OE
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NOTES
1. This jumper can also be used to supress a battery fault condition until a new battery can be fitted. The jumper
disables the battery monitoring only and allows the battery to be charged and provide standby power as normal.
NOTE:
Disabling the battery monitoring with a battery fitted will cause an EN54-4 non-compliance.
2. The power supply must not be used with the jumper in the off position without a DP-PSUEN external temperature
sensor fitted, as this could result in a battery fire or explosion risk.
5.4
LED DISPLAY
Four board-mounted LEDs are used to provide a status and fault display. These
LEDs are brought out to the lid via light pipes and identified with the label as shown.
24 VDC OUTPUT ON
: The yellow LED indicates that DC power is available.
AC INPUT ON
:
The green LED is lit when AC power is available.
BATTERY FAULT
:
The yellow LED is lit when any battery related faults are
detected.
PSU FAULT
:
The yellow LED is lit when any power supply related faults
are detected.
5.5
OP1 AND OP2
Due to high instantaneous current that can flow under fault conditions, the DC output wire is recommended to be
1mm cross sectional area or greater for all DP-PSUEN series power supplies.
The outputs are individually protected against short circuits. The outputs can be switched using the SW1 and SW2
output control inputs. The outputs are fully protected against switching transients and are suitable for switching
highly inductive loads such as door strikes and magnets.
The combined output current of the two outputs must not exceed the power supply ratings.
5.6
SWI AND SW2 INPUTS
These inputs can be used to switch on and off their associated outputs. The polarity of these inputs are selected by
the INV jumper, with the jumper in the off position the outputs can be switched off when the input is low and when
in the on position (inverted) the output can be switched off with a positive input.
The wiring to these inputs shall not be more than 3 meters in length.
The inputs have a 100K pull-up resistor and are 30V tolerant. They are designed to be easily driven by a 5V logic
output, relay contacts or open collector transistors, see drive examples below:
100K
5V
INV in off position, output
switched off when
transistor conducts
100K
5V
INV in on position, output
switched on when
contacts close
100K
5V
INV in off position, output
switched on when
contacts open
SW1
SW2
Internal pull-up
SW1
Internal pull-up
Internal pull-up
5.7
DATA AND LED INTERFACES
These interfaces are used for factory testing and are reserved.
5.8
FAULT DETECTION AND OUTPUTS
Three normally closed relay outputs in no-fault conditions are provided for fault signalling and will open when a fault
is detected. The PSU is factory fitted with two wire links as shown below. To comply with EN54 requirements the
three separate normally closed fault outputs should be connected in series, so should any one of the fault relays
opens in a fault condition, a generic fault condition is signalled.
