GTT Opticom GPS System Installation Manual page 61

58
Recommendations
1. Use a 1N4004 or equivalent diode.
2. Use a 24 VDC relay with a coil impedance of
approximately 1000 ohms. The maximum
amount of current that the phase selector
output is designed for is 50 mA.
The following relay manufactured by IDEC meets
the above listed requirements:
•
Relay: RH1B-UD-DC24V
•
Socket: SH1B-05
This relay contains a diode, so the diode shown in
Figure C-1 is not needed.
This relay is available from Newark Electronics and
other electronics supply houses.
NOTE: For applications with frequent activations,
it is recommended that a solid-state relay be used
in place of an electro-mechanical relay. A load
switch would be another option.
•
Omron G3NA-205B-DC5-24
This relay is available from Digikey
www.digikey.com, (p/n Z165-ND) and other
electronics supply houses.
Intersection Equipment Installation Instructions
The following table lists the wire colors for
Channels (X) A through D and Logic Ground when
using a card rack. See Figure C-1.
Channel X Output
Channel A
Channel B
Channel C
Channel D
Logic Ground
For more pin-out information, refer to the Phase
Selector Pin Index tables in Section 5 of this
manual.
A separate 24 VDC power source will be needed
to drive the relay.
Wire Color
Gray/White
Blue/White
Violet/White
Brown/White
Gray/Black