Wavetronix Click 500 (programmable controller) (CLK-500) - User Guide - Manual (Page 69)

68 CHAPTER 8 • CLICK 511
a Click 100.
There are two types of reporting: alarm and relay. In alarm operation, the base station ac-
tivates its outputs when a field station input is reported as OFF. In relay, the base station
activates its outputs when a field station input is reported to be ON. The base station server
has a method of fail-safe reporting. If the base station is wired to a traffic controller in a
main traffic cabinet, the status of the digital outputs can be remotely monitored by a TOC
using the traffic controller software.
One application for the Click 511 is achieved when the base station is wired to an electrical
relay (e.g. Click 120) to actuate signaling systems. For example, it could be used to actuate
a tattletell light.
Another possible application for the Click 511 is to monitor the status and functionality
of devices such as lights—for instance, marine navigation beacons on a bridge. Beacons
of different colors are commonly used at different locations across a river bridge to guide
marine vessels away from piers and through the channel. The Click 511 can monitor these
lights, alerting the TOC when lights have burnt out, via a traffic cabinet at an intersection
near the bridge.
For this application, the beacons need to have an alarm relay, such as the MLED-RETRO
120 VAC manufactured by Tideland Signal Corporation. The alarm outputs of this device
will connect the NC (normally closed) terminal to C (common) if the beacon is on. Con-
versely, the alarm outputs of this device will connect the NO (normally open) terminal to
common if the beacon is off. For this application it is recommended to wire the NC termi-
nal to Digital In 1 of the Click 511, and the common terminal to Common In 1 (see the
green and black wires in Figure 8.2).
Figure 8.2 – Beacon Wiring to Click 511 Digital Input