Wavetronix Click 500 (programmable controller) (CLK-500) - User Guide - Manual (Page 78)

CHAPTER 8 • CLICK 511 77
Input ON Input OFF < 10
Timeouts
> 10
Timeouts
Figure 8.7 – LED States during Polling
After all the devices are queried, the results are used to drive contact closure outputs. The
assertion level of these digital outputs depends on whether the server is in alarm or relay
operation. To setup the output type, use the main menu task called Set Up Server Output.
This task is detailed in the next section.
If a base station server is in alarm output operation, the contact closure outputs will be ac-
tive when the associated digital input is OFF. This alerts users when the system output they
are monitoring is OFF. The contact closure outputs will be inactive when the digital input
is ON.
If the base station server is in relay output operation, the contact closure outputs will be
active when the associated digital input is ON. The contact closure outputs will be inactive
when the associated digital input is OFF.
The base station server has a method of fail-safe reporting. If an input state is persistently
undiscoverable (or has never been discovered) then the output related to this input will en-
ter the fail-safe state. In alarm operation, the associated output will be ON in fail-safe mode.
In relay operation, the associated output will be OFF in the fail-safe state. However, if the
input state has been recently acquired by a previous query, then this state will be reported
until 10 consecutive timeouts.
The first two contact closure outputs will be signaled via the digital outputs of the Click 511
and the first two contact closure outputs of the Click 100. The remaining six outputs will
be signaled only on the Click 100. You can wire a Click 120 electrical relay to any of these
outputs.
Figure 8.8 shows a demo kit with Click 511 field (client) and base (server) stations. In a real
application, the devices would be in different cabinets. This figure shows a Click 100 con-
nected to the server, as well as an electrical relay wired to one of the outputs.