Wavetronix VDR24 Radar - Manual (Page 39)

Power Up and User Interface Navigation
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7.1. Final Checkout Before Initial System Power-up
At this time, check to verify that the following steps have been completed:
¨ Radar sensors have been mounted, tightened, squared with the roadway, and initially
aimed at the detection zone area.
¨ The radar sensor mast cable is plugged into each sensor and is connected to the
junction box interface point.
¨ An earth ground wire has been connected between the earth ground lug on each radar
sensor and a solid earth ground point at the mast base.
¨ The VDR24 Controller has been mounted in the equipment house or panel and wiring to
external railroad equipment is complete in accordance with prevailing engineering
drawings.
¨ Home run cable wiring from the junction box interface point to the controller is complete,
with all seven connections double-checked for color-coding accuracy and well-clamped
connections – both at the junction box and at the VDR24 Controller terminals.
¨ Nominal 12VDC and ground have been connected to the VDR24 Power terminal strip,
along with a separate, isolated earth ground - ready for connecting into the VDR24
Controller. Double check polarity and voltage levels on terminal positions 1 and 2 (BAT+
and BAT -).
7.2. VDR24 Indicators, Keyboard, and Display Familiarization
This section provides an introduction to the indicators, keyboard, and display located on the
VDR24 radar controller. All detection decisions are made in the radar sensors themselves and
are communicated to the VDR24 for interfacing to railroad equipment. In addition, while the
SSM-Rail application (or more precisely the computer on which it is running) connects to the
VDR24, it is actually passed through the VDR24 and is interfacing with each radar for
configuration and verification.
7.2.1. Indicators
Front panel indicators are provided to verify detection events for each radar along with health
status for each radar. The front panel also displays the current state of the railroad equipment’s
XR and IR relays. When Zone status signals are green, they indicate no detected vehicle (or
train). When red, they signal a detection event or status.
Health status for each radar is continuously communicated to the VDR24 by each radar sensor.
When green, the radar sensor has successfully passed its continually running health check
procedure. A flashing yellow indication means that the VDR24 has detected a potential problem.
It takes the VDR24 about five seconds to verify whether a problem with one or both radar
sensors is serious enough to warrant a failsafe state trigger. If so, a red indication signals that
the radar has experienced an internal failure or has lost power or its communication connection
to the VDR24 controller, and the entire system and all outputs have reverted to their failsafe
states.
7.2.2. Display
The front panel display provides a viewport into detailed aspects of the VDR24 operation.
Information about software versions for the VDR24 and the attached radar sensors is also
displayed in this area. The display will turn off to preserve power and life when no key is