2903 Power Supply
Installation Instructions
I-EA00003
INSTALLATION INSTRUCTIONS (cont)
REV 2
Page 2 of 4
Trouble Shooting Tips
Listed below are some problems that might be encountered during
installation or at any other time and possible solutions for correcting them.
Caution: This unit contains areas of exposed high voltage. All
troubleshooting and maintenance should be performed by a qualified
electrician.
Problem
No output voltage measured across terminals NC, NO, and 24DC.
Solution
›
Check for 120VAC across terminals of input to power supply module.
›
If 120VAC is present, disconnect field wires from all used outputs (NC,
NO, 24DC) and measure for 24VDC across the “24DC” terminals.
›
If 24VDC is now present, check for shorts across field wires for each
output. If the load is an electrified locking device mounted in the door,
check the electric hinge for pinched wires behind each leaf. Also check
for shorted wires between the locking device and raceway in the door.
›
If 24VDC is not present across terminals marked “24DC” (with field
wires still disconnected from all outputs), disconnect the red and black
wire leads connected to the +,- terminals of the output to the power
supply module and check for 24VDC at this output. If voltage is now
present across the power supply module’s output, it can be assumed
that there is a short circuit somewhere on the control board and it will
need to be replaced. If voltage is still not present across the output to
the power supply module, then it can be assumed the power supply
module itself is damaged and must be replaced.
Problem
The electrified locking device behaves the opposite of what was expected,
i.e., it locks when intended to unlock, or unlocks when intended to lock.
Solution
›
A fail safe type locking device may be incorrectly wired to the fail
secure output terminals (NC). It must be wired to the terminals marked
“NO”.
›
A fail secure type locking device may be incorrectly wired to the fail
safe output terminals (NO). It must be wired to the terminals marked
“NC”.
›
Make sure that the electric locking device has been correctly modified
for the function intended: Fail Safe (power to lock), Fail Secure (power
to unlock).
›
The control switch may be incorrectly wired. To lock a fail safe or fail
secure electric locking device, the control switch must be closed. To
unlock a fail safe or fail secure electric locking device, the control switch
must be open.
Problem
The electric locking device does not unlock when a control device, such as a
card reader or keypad, is activated.
Solution
›
The control output from the card reader or keypad must be in the from
of dry contacts and wired across the terminals marked “OPR”. In some
cases, card readers and keypads put out a switched voltage output
when activated. Check these outputs with a voltmeter to ensure that
there is no AC/DC voltage present across these outputs when activated
or deactivated.
SPECIFICATIONS
Input Voltage:
120VAC/240VAC, 50/60Hz
AC Current:
900mA/120VAC, 600mA/240VAC
Output Voltage:
24VDC Filtered, Regulated
Output Current:
2.0A
Output Power:
48W
Protection:
Overload, Over Voltage, Short Circuit
