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© 2013 UTC Fire & Security. All rights reserved. 1 / 2 P/N 501-1761ZE-1-05 (EN) • REV 05 • ISS 07JUN13
A50E-2 Line Relay Unit Installation Sheet
Description
The A50E-2 Line Relay Unit is an addressable device used to
provide one Form C change over dry relay contact to control
external appliances (door closers, fans, dampers, etc.) or
equipment shutdown. The system firmware ensures that the
relay is in the proper ON/OFF state. Upon command from the
control panel, the relay energizes. TB2-6 and TB2-7 provide a
normally-closed relay connection; TB2-7 and TB2-8 provide a
normally-open relay connection. One device address is
required.
Up to 127 devices can be assigned to the loop. All devices
incorporate a binary DIP switch enabling them to be given a
unique address. A red LED indicator illuminates when the unit
has activated.
Installation
Notes
• This module complies with the requirements of EN 54-18.
If the module is used in conditions or circumstances that
do not comply with those tested for and allowed in
EN 54-18, operation may be impaired, and the supplier will
not be liable for any injury suffered or damage caused as
a result. You must contact our technical support
department for advice if the device is to be used in
conditions that differ from those prescribed in EN 54-18.
• This module will not operate without electrical power. As
fires frequently cause power interruption, we suggest you
discuss further safeguards with your local fire protection
specialist.
WARNING: Electrocution hazard. Dangerous voltages may be
present at terminals even when the power is shut off. Take
proper precautions to avoid injury or death.
Note: The A50E-2 Line Relay Unit is shipped from the factory
as an assembled unit; it contains no user-serviceable parts and
should not be disassembled
To install the device:
1. Verify that all field wiring is free of opens, shorts, and
ground faults.
2. Make all wiring connections as shown in Figure 1.
Notes:
• If a 2 in. (51 mm) 1-gang box is used, conduit can enter
the electrical box through only one knockout hole.
• If a 2-1/2 in. (64 mm) 1-gang box is used, conduit can
enter the electrical box through one or both
knockout holes.
Mounting
The A50E-2 can be mounted using any of three methods:
• A DIN rail method for mounting multiple/single units
• Adaptor plates for accessory box mounting
• Single box mounting
The unit can be mounted in a European 100mm square box.
The terminal blocks will accept 14, 16, or 18 AWG wire (0.75,
1.0, 1.5, mm²). Sizes 16 and 18 AWG are preferred.
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2 / 2 P/N 501-1761ZE-1-05 (EN) • REV 05 • ISS 07JUN13
Wiring
Figure 1: Wiring the A50E-2 Line Relay Unit
Setting the address
The A50E-2 Line Relay Unit contains a seven-segment DIP
switch. The switch is used to set the device address in binary
code. The switch may be set to represent any address from 1
to 127.
In the ON position, a switch represents its code value. In the
OFF position it represents a zero. See the table below.
Switch
number
1 2 3 4 5 6 7
Code value 1 2 4 8 16 32 64
To arrive at the address number of a device, add the code
values of all switches that are in the ON position, for example
switches 2, 3, and 6 set to ON represent address 38 (2 + 4
+ 32).
Specifications
Application Indoor use
Operating environment
Temperature
Relative humidity
−10 (±3) to +55 (±2)°C
20 to 95% noncondensing
Indication LED (red) flashing on activation
Operating voltage
20 volt pulsed analog loop
(19.5 to 20.5 VDC).
Max line drop 4 VDC
Standby current 600 µA
Alarm current 700 µA
Relay contact rating
DC
Voltage
Current
AC
Voltage
Current
30 VDC max.
1 A
40 VDC
0.30 A
Power factor resistive load 1 PF
Power factor inductive load
(L/R = 7 mS)
0.4 PF
Regulatory information
Manufacturer
UTC Fire & Security South Africa (Pty) Ltd.
555 Voortrekker Road, Maitland, Cape Town
7405, PO Box 181 Maitland, South Africa
EU authorized manufacturing representative:
UTC Fire & Security B.V.
Kelvinstraat 7, 6003 DH Weert, Netherlands
Year of
manufacture
The year of manufacture, in the format YYDDD,
is located on the product barcode label, as shown
below.
Product type Type A for indoor use
Certification
CPD certificates 0832-CPD-0965
EN 54 EN 54-18:2005
2002/96/EC (WEEE directive): Products marked
with this symbol cannot be disposed of as
unsorted municipal waste in the European Union.
For proper recycling, return this product to your
local supplier upon the purchase of equivalent
new equipment, or dispose of it at designated
collection points. For more information see:
www.recyclethis.info.
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