Wavetronix Click 400 (900 MHz radio) (CLK-400) - User Guide - Manual (Page 148)

CHAPTER 13 • CLICK 200 147
Note
The Click 200 does not convert RS-232 to RS-485 or vice versa. Connecting to the
DB-9 connector will allow you to communicate with the sensor using RS-232 proto-
col, but not using RS-485 protocol. You will also not be able to use the DB-9 connec-
tor to communicate with other devices over the T-bus. If you need to convert RS-232
to RS-485, use another Click module such as the Click 304.
A pinout diagram is provided on each individual unit as a reference in the field.
Note
Certain newer Click 200 devices also have an LED on the faceplate. This LED, if pres-
ent, lights up to indicate power is present and surge protection is okay. If the light is
off, either there is no power to the device or surge protection is currently not ready.
Power Connections
The Click 200 receives power from the T-bus via the T-bus connection on the back of the
module. Additionally, if the power supply is not wired directly into the T-bus, power can be
connected to the +DC and -DC screw terminals on the UNPROTECTED side of the mod-
ule. In this case, the Click 200 will then pass power through the T-bus to all other devices
connected to it.
Installation
To install the Click 200 in a pole-mount cabinet, simply mount it on the DIN rail and wire
the service end of the sensor cable into the PROTECTED side (see the section on wiring
for how to do this).
In many installations, the pole-mount cabinet is also connected to a main traffic cabinet
via an underground homerun cable. To protect the traffic cabinet, a second surge device is
required.
Note
If any part of the cable goes underground, it’s necessary to have a Click 200 on each
end of the cable to protect the traffic cabinet and pole-mount box from electrical
surges.