Installation Instructions
PS2/PS2BB
The PS2 series is designed to power Command Access modified exit devices, Von
Duprin EL devices, or Dor-o-matic EL devices. The PS2 series is a regulated, linear
power supply rated at 2 Amps @ 24VDC. It’s state-of-the-art, solid-state design offers
a flexible and cost effective solution. Its built-in surge capabilities allow it to power
up to two latch-retracting exit devices, when used with Command Access power
modules. The PS2 series is a feature-rich 24VDC power supply that offers solid-state
Inputs/Outputs, fire alarm link, optional battery charging circuitry and other standard
features to give you the flexibility and control to do the job right.
SPECIFICATIONS
• Input - 120 VAC, 60Hz, 700mA
• Measured Output Range – 24Vdc
+/-
5%, 1 amp
• UL294, Class 2 Output
• Priority Sensing - When two devices are triggered simultaneously, output 1 will fire first,
output 2 will fire within 500ms.
• Electronic over load & temperature detection- Each channel has high speed
electronic over load & temperature protection that functions independent of the
other channel.
• Input trigger - Dry contact
• LEDs - Red=AC Power indicator, Green=Output Indicator
• Temperature range - 0 to 49°c
• Enclosure - 12.5”W x 15”H x 4”D (Holds (2) 7AH Batteries)
• Fuses - AC= 2A Slow Blow 5mm x 20mm
• Fire Alarm Link
• “Euro-style” removable terminal blocks used
• Factory installed Option BB-Battery charging - Regulated, independent battery charging
• Factory installed Option BB-Battery backup - Automatic uninterrupted battery backup.
• Batteries not included (requires 2 each 7AH 12V batteries)
• Intended Access Control Level is Class 1
• Maximum Humidity - 85%
DESCRIPTION
Command Access Technologies | 22901 La Palma Ave, Yorba Linda, CA 92887
| Phone: (888) 6-ACCESS Fax: (888) 622-2302
Symptom
Possible Cause
Solution
• Power supply makes a
beeping sound
Possibilty 1- Power supply is too hot,
microprocessor is shutting the power
supply down.
Possibility 2- Fire alarm link removed or
Fire alarm contact broken or loose
Check to see current draw is exceeding the 2 Amps
continuous rating. If so, eliminate one device that’s
connected and check current draw.
EL Exit device can’t fully
retract latch
Possibility 1- Wire gauge from power
supply to exit device too small
Possibility 2- Distance from Power
Supply. to exit device is too far
Possibility 3- Exit device out of
adjustment
Check with your device manager’s wiring
specifications.
Green channel LED won’t
light up, channel isn’t
working
Possibility 1- Dead short or overload
Possibility 2- Bad solenoid in exit device,
or defective interface device between
solenoid and power supply.
Shut off power, detect short, restore power,
channel will reset.
Power supply not working
and red LED not lit.
Possibility 1- AC fuse blown
Replace fuse with 2A Slow Blow 250VAC
5mm x 20mm
TROUBLESHOOTING
Re-adjust exit device according to manufacturer’s
mechanical recommendations.
Check with your device manager’s wiring
specifications.
Check solenoid coil resistance and compare to
manufacturer spec. If not close, contact service
represenative.
•
•
•
If not hooked up to fire/life-safety system, make sure
jumper wire for the fire alarm is properly connected.
If hooked up to fire/life-safety system, make sure system
is functioning correctly
Doc. #20020_A
Possibility 2- Short Circuit
If replacement fuse has blown then there
is likely a short circuit in the board & it
will need to be replaced.
Connecting to the Fire Alarm Link (if needed)
1. Shut off the 120 VAC to the power supply.
2. Remove the jumper wire from “FIRE”
terminal. (see fig 5)
3. Connect to normally closed fire alarm relay.
4. Restore AC voltage to power supply
fig. 5
FUSE F1
2.0A
250V
SLOW BLOW
LINE
NEUTRAL
+ -
IN
1
+ -
OUT
+ -
IN
2
+ -
OUT
+ -
FIRE
+
-
+ -
BAT
RED POWER LED
GREEN
CHANNEL 2
LED
GREEN
CHANNEL 1
LED
WIRE JUMPER INSTALLED
WHEN NO FIRE ALARM RELAY
IS CONNECTED
REMOVEABLE
CONNECTORS
WHEN BATTERY BACKUP OPTION IS USED,
TWO 7AH 12V BATTERIES MUST BE INSTALLED IN SERIES.
BLACK
GREEN
120VAC
60Hz
0.64A
WHITE
COMMAND ACCESS PS2BB
ACCESS CONTROL
CLASS 2
POWER SUPPLY
BUZZER
+ -
NORMALLY OPEN
DRY CONTACT FROM
ACCESS CONTROL
SYSTEM
NO VOLTAGE
DEVICE 1
(24VDC 700mA MAX)
DEVICE 2
(24VDC 700mA MAX)
+
-
NORMALLY OPEN
DRY CONTACT FROM
ACCESS CONTROL SYSTEM
NO VOLTAGE
+
-
OPTIONAL
7AH 12V BATTERY
CAUTION!
RISK OF FIRE!
CHARGE ONLY 12V
LEAD ACID
GEL-CELL TYPE
RECHARGEABLE
BATTERIES.
OPTIONAL
7 AH 12V BATTERY
(24VDC)
