Elmdene TR2 User manual

Technical Support Line [phone] TR2 / TR4
© 2009 Elmdene International Ltd PAK200481_01A May 2009
ELMDENE INTERNATIONAL LIMITED
RODNEY ROAD
FRATTON
PORTSMOUTH
PO4 8SS
TEL: + 44 (0) 2392 739412
FAX: + 44 (0) 2392 811631
www.elmdene.co.uk
TRx Range 24vdc Door Retainer Power Supplies
Overview
The TR range of power supplies are designed specifically for use with electromagnet door open
retainers such as used on fire doors. A 24vdc output is provided for direct connection to the
door retainer electromagnet. Two versatile remote control inputs permit flexible connection to
various remote control sources to switch off the output in the event of a fire alarm or other
command:
(a) closure of a normally open volt-free contact, for example a push switch or door controller
output relay
(b) application of an external 24vdc supply, for example from a sounder drive circuit
The output of the TR power supply is automatically removed when the mains supply is lost thus
providing fail safe operation.
When acting as a slave to a door controller, the control contact input should be connected to
the normally closed output of the controller that is actively held open when the controller is
operating normally. This ensures that should the door controller fail, its normally closed output
will de-energise the power supply output.
LED status indicators provide quick diagnostics showing the presence of a mains input, and an
output fuse failure.
Note this power supply should NOT be used for charging standby batteries.
Specification
Input
TR2
TR4
Voltage
230Vac, 50Hz nominal
Current
290mA maximum
500mA maximum
Mains input fuse
T0.5A 20mm, 250Vac HBC
T1.0A 20mm, 250Vac HBC
Output
Voltage
22- 30vdc dependent on load
Load Current
2A maximum
4A maximum
Load output fuse
F2A 20mm, 250Vac glass
F4A 20mm, 250Vac glass
Mechanical
Case material
1.2mm steel, white powder coated
Size
230 x 200 x 80mm
Weight
3.0Kg
3.5Kg

Technical Support Line [phone] TR2 / TR4
© 2009 Elmdene International Ltd PAK200481_01A May 2009
Environmental
Temperature - operating -10 to +40 OC 95% RH non-condensing
Temperature - storage -20 to +80OC
Connections
DOOR + and - Switched _24v to door retainer magnet
Control Contact Open circuit = PSU output ON
Short circuit = PSU output OFF
Ext Supply + and - Apply +24vdc to switch OFF PSU output
Indicators
Green LED Mains Present
Amber LED Output fuse blown
Installation
This unit is only suitable for installation as permanently connected equipment and must be
used with DC appliances only. The PSU is NOT SUITABLE for external installation. The PSU
should be installed according to all relevant safety regulations applicable to the application.
This unit must be fed from a mains power source having a separate (approved) disconnect
device and fitted with a fuse or other over-current protection device rated at 3A maximum.
Ensure that the disconnect device used has appropriate earth fault protection to the applicable
standard.
1) Fix to wall or other support structure in correct orientation i.e. with hinge on left hand
side, using screws of sufficient size and length through the mounting holes.
2) PSU should be mounted no further than 10cm from the control and indicating
equipment, close coupled by conduit.
3) Knock-outs are provided in the case for mating with external trunking or conduit.
4) Mains input cable must be to the applicable standard with a 3A or greater current
capacity, i.e. 0.5mm2nominal conductor area, having a minimum operating voltage of
300/500 Vac.
5) The low voltage output cable must be sized to carry the rated load current to the
devices connected to the PSU.
6) Mains input and low voltage output cables should be routed to use different entry / exit
case holes. Bushes should be used to protect cable sheaths from chamfer. Ensure that
these bushings are correctly sized (i.e. close fitting with respect to cable sizing). Note
that the bushes should meet a minimum flammability specification of UL94 HB.
7) The Mains input cable should be securely fastened in position using a cable tie through
the saddle provided.
Commissioning
1) With no other connections made to the PSU, connect the mains input wires to the
terminal block, ensuring that the mains isolator (disconnect device) is open.
Fasten wiring in place with cable tie to saddle. Note: Equipment must be earthed.
2) Apply mains input. Ensure that the green Mains LED illuminates and that 24vdc
nominla is present at the DOOR connections.
3) Remove mains power. Make connections to door retainer and control inputs according
to the option selected below.
4) Re-apply mains power. Activate control input and verify that power is removed from
door release electro-magnet.
5) Close cover and secure using fastening screws provided

Technical Support Line [phone] TR2 / TR4
© 2009 Elmdene International Ltd PAK200481_01A May 2009
Operating Instructions
This unit is intended for use by Service Personnel only. There are NO USER SERVICEABLE
parts inside.
The green Mains LED will be illuminated whilst the mains supply is present. In the event of a
failure, the amber LED will illuminate.
Maintenance
There is no regular maintenance required of the PSU.
If the output of the PSU fails the cause of the failure should be investigated e.g. short circuit
load. The fault should be rectified before restoring power to the PSU. The following fuses may
need to be replaced. Ensure the correct fuse rating and type is used.
TR2 TR4
Load Output Fuse: 20mm, 250Vac glass F2.0A F4.0A
Internal Mains Fuse: 20mm, 250Vac HBC T0.5A T1.0A
Connection
Option A: Push Switch to Release Door Retainer
Connect an external contact to the control contact inputs.
Switch closure will disconnect the PSU output.
+
DOOR DOOR RETAINER
-
CLOSE SWITCH TO TURN OFF OUTPUT
+
EXT SUPPLY NO CONNECTION
-

Technical Support Line [phone] TR2 / TR4
© 2009 Elmdene International Ltd PAK200481_01A May 2009
Option B: Sounder Circuit Releases Door Retainer
Connect an external switched 24Vdc supply to the EXT SUPPLY terminals.
OBSERVE CORRECT POLARITY.
Application of 24V dc to these terminals will disconnect the PSU output.
Note: the 0v connection of the external 24vdc supply is internally connected to the 0v output of
the TR power supply. Correct polarity and common 0v references MUST be used between the
TR power supply, the door magnet and the external control source.
+
DOOR DOOR RETAINER
-
NO CONNECTION
+ +24V dc
EXT SUPPLY APPLY TO DISCONNECT OUTPUT
- 0V
Option C: Slave for Door Controller
Connect the normally closed switch output of a door controller to the control contacts.
The PSU acts as a slave to the door controller.
+
DOOR DOOR RETAINER
-
NC Access
COM Controller
+
EXT SUPPLY NO CONNECTION
-
The packaging supplied with this product may be recycled.
Please dispose of packaging accordingly.