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Radar Speed Sign Operation Manual_MN0025 v21.02
Appendix A: Relay Switch Option
Overview:
The TC
-
600 Interface board allows
users to connect the TC
-
600 Radarsign
to external devices.
The interface board has two relay
outputs (connectors shown in green)
and one input (connector shown in
blue).
The Relay Outputs can be used to
power or trigger external devices; the
Input Trigger can be used to change
the sign
’
s display configuration based
on the presence or absence of an external signal.
Input Trigger:
The Interface Board has an input which will change the radar speed sign
’
s configuration based on external
input. The input is universal; it can be triggered by applying any voltage from 12 VDC –
120
VAC across
the input screw terminals. The input trigger latches on for two seconds, which allows flashing beacon
lamps to be used to trigger an input event. As long as the input sees a voltage above 12 V at least once
every two seconds, the trigger will remain active.
When using the Input Trigger with DC sources, polarity is important, ensure the
positive wire leads to the screw terminal marked with a (+). When using the Input
Trigger with an AC device, polarity does not matter.
To use the trigger input, first set up the
Trigger Configuration
by
clicking the
Trigger
link at the bottom of the
HOME
configuration screen.
This link leads to a configuration page nearly identical to the
HOME configuration page
.
Set the
Trigger Configuration
as desired.
Then click
Set Config
and
Return HOME
to return to the
HOME
configuration page.
✓
HOME
configuration page
Relay
Input
Relay
Outputs
T
o
CP
U
