User Manual

Axell Wireless Limited
Technical Literature
L.A. M.T.A. Remote Sites
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 117 of 148
4.10.5.8. 24V Relay Dual Assembly (20-001602)
The General Purpose 24V Dual Relay Board (20-001602) allows the inversion of signals and the
isolation of circuits. It is equipped with two dual pole change-over relays RL1 and RL2, with
completely isolated wiring, accessed via screw terminals. Both relays are provided with polarity
protection diodes and diodes for suppressing the transients caused by "flywheel effect" which can
destroy switching transistors or induce spikes on neighbouring circuits. Its common use is to
amalgamate all the alarm signals into one, volts-free relay contact pair for the main alarm system.
20-001602 Specification
PARAMETER SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm Threshold Vcc - 1.20 volt +15%
Alarm output relay contacts:
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0µA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x10
7
operations
Relay approval BT type 56
Connector details Screw terminals
operational -10°C to +60°C Temperature
range
storage -20°C to +70°C
4.10.5.9. 12V Relay Assembly 80-008909
Relay Board (80-008909) allows the inversion of signals and the isolation of circuits. It is equipped
with a single dual pole change-over relay RL1, with completely isolated wiring, accessed via a 15 way
in-line connector.
The relay is provided with polarity protection diodes and diodes for suppressing the transients caused
by "flywheel effect" which can destroy switching transistors or induce spikes on neighbouring circuits.
It’s common use is to amalgamate all the alarm signals into one, volts-free relay contact pair for the
main alarm system. This relay board also carries an LED to serve as a “Status OK” indicator which is
illuminated during normal operation.
80-008909 Specification
PARAMETER SPECIFICATION
Operating voltage 8 to 30V (floating earth)
Alarm threshold Vcc - 1.20 volt +15%
Alarm output relay contacts
Max. switch current 1.0Amp
Max. switch volts 120Vdc/60VA
Max. switch power 24W/60VA
Min. switch load 10.0µA/10.0mV
Relay isolation 1.5kV
Mechanical life >2x10
7
operations
Relay approval BT type 56
Connector details Screw terminals
operational -10°C to +60°C Temperature
range
storage -20°C to +70°C