FEATURES
» Controls an opening with electrified locking device and automatic door
operator
» Separate inputs for activation switch on entry and exit sides of
opening
» Separate 24 VDC outputs for fail safe and fail secure electrified
locking devices (1 amp max. for either output)
» Relay dry contact output to automatic door operator input
» Input for optional fire alarm or emergency release switch when
urgent unlocking of door is required
» Auxiliary 24VDC Constant Voltage Output for Powering Stand Alone
Devices, Such as Keypads, Motion Detectors, and Status Indicators
(1 amp max.)
» Built-in time delay between activation of electrified locking device and
automatic door operator
» Filtered/Regulated 24 Volts DC
» Class 2 Rated Outputs
» Overload, Over Voltage, and Short Circuit Protection
» Automatically Accepts 120VAC or 240VAC Input Without Requiring to
Move Jumpers or Set Dip Switches
» UL Listed and Tested to 294 Standard for Access Control System Units
2904 Power Supply
Installation Instructions
I-EA00041
INSTALLATION INSTRUCTIONS
The unit must be mounted indoors and away from any moist or
wet areas. Some common locations for mounting 2904 would
be in the plenum near the door containing the electric locking
device or in a nearby closet or electrical room.
When installing the unit in the plenum, wires must either be of
plenum rating or contained inside conduit. The unit must be
mounted in a vertical position with the power supply module
located at the top, as shown in the photograph above. Four 1/4”
holes are provided for mounting the box to the wall or other rigid
surface. If the surface material is wood, it must be at least 1
inch thick. Use either a truss or pan head, 1 inch long sheet
metal screw (#10 or larger) for fastening the box to the wood
surface. When mounting the unit to 1/2 inch or 5/8 inch dry
wall, it is recommended that 3/16 inch or 1/4 inch diameter
toggle bolts be used for maximum support. Use the same size
toggle bolts for mounting the unit to hollow concrete blocks. For
mounting to concrete, solid block, or brick, it is recommended to
use 1-3/4 inch long (minimum) x 1/4 inch diameter hex head
bolt anchors (sometimes called power-bolts) in 18-8 stainless
steel or Grade 5 zinc-plated steel. The sub plate can be removed
from the box for easier access to the mounting holes. To
remove the sub plate, locate the four #6 locknuts near each
corner of the plate and remove. The 6-32 studs, from which the
sub plate mounts to, are held in place to the box by threaded
standoffs.
to convert from one input voltage to the other. Because the
power supply module contains Class 2 double insulation, an
earth ground wire is not required. For wiring 120VAC or 240VAC
input, run 14 AWG 2-conductor to the power supply module's
input terminals marked L (Line) and N (Neutral). Ensure that
the conductors are fully inserted into the input terminals with no
bare metal exposed. (Refer to the wire stripping instructions
included on the wiring diagram attached to the cover plate of
this power supply.)
Caution: It is important to maintain separation
between the primary (high voltage AC) wiring and secondary
(low voltage DC) wiring as they are routed inside the power
supply enclosure. The primary wiring must be run inside
conduit; and the conduit must be connected to one of the
knockouts located towards the left end of the top wall of the
enclosure (above and to the left of the power supply module's
input terminals). All secondary wiring must be routed through
any one of the knockouts located along the bottom wall of the
enclosure.
Note: This unit is not equipped with a battery standby power
feature.
Wiring the AC Input
The 2904 power supply is rated for use with a 20 amp branch
circuit and is capable of accepting either 120VAC or 240VAC
input without the need for making any changes, or reconfiguring
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Page 1 of 6
INSTALLATION INSTRUCTIONS (cont)
2904 Power Supply
Installation Instructions
I-EA00041
General Description
This power supply provides the necessary electronics for
controlling a complete automated door opening system by
coordinating the control of an electrified locking device and
automatic door operator, resulting in a proper sequence of
operation from beginning to end of cycle. The paragraph below
describes how the system operates, and gives the installer an
idea of what can be expected once the system has been
installed and is ready for testing.
To start the automatic opening cycle, a control device, normally
located next to the opening on the entry and exit sides, is
activated. Immediately, the electrified locking device releases
to allow the door to swing freely. After a brief delay (about 1
second), the input to the automatic door operator unit receives
a dry contact signal from the 2904 power supply, and the door
is driven to the open position. The signal to the operator unit
resets within approximately 3 - 5 seconds from the time it had
been received. From this point, the “Door Hold-Open” time
delay built into the automatic door operator unit continues to
hold the door in the open position for as long as the delay had
been initially set, or programmed for. Once this delay times out,
the door will then freely close shut and become locked via the
electrified locking device. (The locking device switches back
from the unlocked state to the locked state at the same time the
signal to the automatic door operator is aborted.) The cycle is
completed, and the system is now ready for the next activation
occurrence.
Activation Switches
Marked as OAS for “Outside Activation Switch”, and IAS for
“Inside Activation Switch” at terminal block TB1, these inputs
normally require a normally open, momentary switch for
activating the automated door opening system. The most
commonly used of these types are wall mounted push-button
switches with large diameter actuators, such as used for
handicap access. Card readers and keypads can be used for
authorized access. They utilize the normally open, dry contact
output of a relay for activating the system. For best results
when using these devices, have their built-in time delay set for
one second, simulating the approximate length of time for a
contact closure when depressing a push-button switch. By
doing this, there are no extended delays to get confused with
when coordinating the door hold open time adjustment on the
automatic door operator unit with the 3 - 5 second delay
generated by the output signal from the 2904 power supply to
the operator input.
Maintain Switch Option
By wiring a maintain switch in parallel with a momentary switch
across the OAS or IAS input terminals, the signal to the
automatic door operator can be extended (while the switch
contacts remain closed) for an indefinite period of time, and will
hold the door in a maintained open position. This may prove
useful in places where extra time is needed to move carts or
other equipment through the door. When the maintain switch
contacts are opened, the door will then close after the “Door
Hold-Open” delay programmed into the automatic door
operator unit times out.
One-Shot Activation Option
The 2904 can be programmed to allow the automated door
opening sequence to go through its complete open/close cycle
in spite of a constant maintained contact closure held across the
OAS or IAS input terminals. This option may be desirable in
overcoming any deliberate attempts at holding the activation
switch in the closed position which would cause the door to
remain in a maintained open position, contrary to its normal
cycle. To program in this option, place the slide switch marked
“1” on the onboard dip switch bank to the position opposite the
“ON” position, as shown below:
The dot shown above marks the position of the switch.
Note: When using the one-shot activation option, the
following point must be observed: With the activation switch
contacts in the maintained closed position, and after completion
of a full open/close cycle, before the next activation can occur,
the activation switch contacts must be held open for 4 seconds
(for resetting the delay circuit) before closing to reactivate the
cycle.
Electrified Locking Devices
The 2904 is provided with an output for wiring to a fail safe type
locking device (marked as FSF at terminal block TB1) and
another output for a fail secure type locking device (marked as
FSC). All locking devices must be rated 24VDC. The
maximum allowable current draw for either output is 1
amp. (If a pair of doors is used in the application, and each leaf
contains an electrified locking device, the maximum current
draw for each device must be 0.5 amp.)
The most common type of fail safe locking device used on this
kind of system is the electromagnetic lock. A complete riser
diagram and point-to-point wiring diagram depicting an
application utilizing this type of locking device can be found at
the end of this manual, shown as figures 1a and 1b respectively.
A latching type of fail safe electrified locking device can be used
providing that it is designed to have its latch retracted in less
than 1 second upon removal of power when the cycle has been
activated, and providing the solenoid or motor used in the
device does not draw more than 1 amp at 24VDC.
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Page 2 of 6
INSTALLATION INSTRUCTIONS (cont)
When only an electromagnetic lock is used for locking
and releasing the door, there cannot be a mechanical
latching device, such as a mortise or cylindrical lockset,
attached to the door. This would prevent automatic
opening of the door. The opening must be equipped
with push-pull hardware trim only.
2904 Power Supply
Installation Instructions
I-EA00041
The most common type of fail secure locking device used is the
electric door strike. A complete riser diagram and point-to-point
wiring diagram depicting an application utilizing this type of
locking device can be found at the end of this manual, shown as
figures 2a and 2b respectively. A latching type of fail secure
electrified locking device can be used providing that it is
designed to have its latch retracted in less than 1 second upon
application of power when the cycle has been activated, and
providing the solenoid or motor used in the device does not
draw more than 1 amp at 24VDC.
Both a fail safe and fail secure electrified locking device can be
used on the same door, if desired. As an example, a single door
may contain a fail safe electromagnetic lock on the door frame
header and a rim exit device with fail secure electric latch
retraction on the door. When the system is activated, power is
removed from the electromagnetic lock at the same time power
is applied to the rim exit device (for retracting its latch) prior to
signaling the automatic door operator to open. Each of these
devices can separately draw up to 1 amp of current since, at no
one time are both devices drawing current simultaneously.
CAUTION: Do not use the Hager 4500 ELR, Von Duprin
Series EL, or any other manufacturer of electric latch retraction
exit devices with the 2904 power supply. These devices
generate an initial high current pulse in excess of 8 amps. The
2904 power supply is not designed to handle that amount of
current draw. Special power supplies, specifically designed for
use with these type of exit devices, are available by contacting
the manufacturer. Before using any exit device modified for
electric latch retraction, make sure to check out its electrical
specifications for ratings, and ensure that the manufacturer of
the device does not require it to be used with a special power
supply offered by that manufacturer.
The dot shown above marks the position of the switch.
Emergency Release Switch
The emergency release switch input, marked as ERS at terminal
block TB1, accepts a normally closed switch (or normally closed
relay contacts) that is associated with some form of emergency,
such as a panic alarm, or fire alarm. When the switch contacts
open during an emergency situation, the electric locking device,
regardless if it is fail safe or fail secure function, will unlock the
door for immediate access. The 2904 comes from the factory
with the emergency release switch input disabled. To enable the
ERS input, switch #4 from the onboard dip switch bank must be
placed opposite the “ON” position, as shown below:
The dot shown above marks the position of the switch.
Auxiliary 24VDC Output
This output, marked as 24V at terminal block TB1, provides a
constant 24 volts that can be used to power keypads, motion
detectors, LED or incandescent status indicators, etc. A
maximum load of 1 amp is allowed across this output.
Automatic Door Operator
The output terminals marked ADO at terminal block TB1 provide
the electrical signal to the input of the automatic door operator
for activating its “door open” cycle. This electrical signal is in the
form of dry contacts from a relay located on the same p.c. board
as TB1. The ADO output can be programmed for either a
normally open or a normally closed contact signal. Most
automatic door operator units accept a normally open contact
signal, and the onboard dip switch bank is factory set for a
“N.O.” output. But in the event that a normally closed (N.C.)
signal should ever be required for activating an automatic door
operator directly or indirectly, reconfigure the dip switch bank
#2 and #3 switches per the illustration in the next column:
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INSTALLATION INSTRUCTIONS (cont)
2904 Power Supply
Installation Instructions
I-EA00041
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 24V, FSF, or FSC.
Solution
› Check for 120VAC across terminals of input to power supply
module.
› If 120VAC is present, disconnect field wires from all used outputs
(24V, FSF, FSC) and measure for 24VDC across the “24V” 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 “24V” (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 (FSC). It must be wired to the terminals marked
“FSF”.
› A fail secure type locking device may be incorrectly wired to the fail
safe output terminals (FSF). It must be wired to the terminals marked
“FSC”.
› 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).
Problem
A maintained activation switch is intended to be used to initiate the
automated door opening system and hold the door in an open position;
but when activated, the door goes through a complete open/close cycle
instead of staying open.
Solution
› Dip switch #1 from the onboard dip switch bank is set for
“One-Shot Activation”. Correct this by placing dip switch #1 to the “ON”
position. (See the above section entitled, “One-Shot Activation Option”
under “Activation Switches” for more details.)
Problem
When the 2904 is powered up and the green “Power” indicator on the
small p.c. board is lit, the electric locking device immediately releases,
followed by activation of the automatic door operator, without manually
activating the system.
Solution
› Field wires from the activation switch may be shorted together.
› The 2904 activation inputs have been mistakenly wired to the
normally closed contacts of the activation switch instead of the normally
open contacts.
Problem
When the 2904 is powered up and the green “Power” indicator on the
small p.c. board is lit, the electric locking device does not release, but
the automatic door operator is activated and attempting to open the
door, without manually activating the system.
Solution
› The dip switch settings for the ADO output are not correct, or are
reversed from what they should be. Determine if the automatic door
operator activation input accepts a contact closure or open contact
signal for opening the door; then set the dip switches accordingly as per
instructed in the section above entitled, “Automatic Door Operator”.
Problem
The electric locking device all of a sudden releases, and the automatic
door operator opens the door without being manually activated
(characteristic of a symptom involving a fail safe locking device).
Solution
› The power supply has shut down due to a shorted output.
› Loss of AC power to the 2904.
Problem
The automatic door operator all of a sudden becomes activated and is
attempting to open the door; but the electric locking device remains
locked, preventing the door from opening (characteristic of a symptom
involving a fail secure locking device).
Solution
› The power supply has shut down due to a shorted output.
› Loss of AC power to the 2904.
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
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SPECIFICATIONS
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Page 4 of 6
Figure 1a
2904 Power Supply
Installation Instructions
I-EA00041
WIRING DIAGRAMS
HAGER 2904 POWER SUPPLY
Figure 1b
2904
24V FSF FSC OAS IAS ADO ERS
NOTES
AUTOMATIC DOOR OPERATOR
“DOOR ACTIVATE” CONTROL INPUT
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Page 5 of 6
Figure 2a
2904 Power Supply
Installation Instructions
I-EA00041
WIRING DIAGRAMS (cont)
HAGER 2904 POWER SUPPLY
Figure 2b
2904
24V FSF FSC OAS IAS ADO ERS
NOTES:
AUTOMATIC DOOR OPERATOR
“DOOR ACTIVATE” CONTROL INPUT
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Page 6 of 6
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