User Manual

Fibre Optic Master and Remote Site
User Handbook
Document Number: 60-212701HBK - Issue No. 1 Page 21 of 50
4.1.6.2. UHF 3dB Splitter/Combiner (05-002603)
The 3dB Splitter/Combiner (05-002603) is a device for accurately matching two RF signals to a single
port or splitting an RF signal to two ports whilst maintaining an accurate 50 load to all inputs/outputs
and ensuring that the VSWR and insertion losses are kept to a minimum.
05-002603 Specification
PARAMETER SPECIFICATION
Frequency range 380 - 520 MHz
Bandwidth 140 MHz
As Combiner 2 inputs 1 output
Ports
As Splitter 1 input 2 outputs
Insertion loss 3.5 dB (typical)
Isolation >18 dB
Return Loss (VSWR) – Input Better than 1.3:1
Return Loss (VSWR) – Output Better than 1.3:1
Impedance
50 9
Power Rating – Combiner 0.5 Watt
Power Rating – Splitter 20 Watts
Connectors SMA female
Size 54 x 44 x 21 mm
Weight 200 gm (approximately)
4.1.6.3. 24V Relay PCB Assembly (80-008902)
The General Purpose Relay Board 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 screw terminals.
The relay is provided with a polarity protection diode 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.
80-008902 Technical Specification
Parameter Specification
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 15-way 0.1" pitch
operational -10°C to +55°C Temperature
range
storage -40°C to +70°C