Link Communications RLC-CLUB, User Manual

Page: 165 / 329

12-1
Version 1.73 Copyright © 1997 Link Communications Inc. 1/18/97
Chapter 12: I/O System
About the I/O System:
The RLC-Club supports eight logical outputs (Requires the RLC-Club Deluxe Module) and 4
analog input lines. They are all handled totally separately in software; each command applies
to only one of the three types of lines. Each type will be described below.
Please note that you can control how often the RLC-Club checks the input line and analog
alarms by using Command 020 to change the reset value of timer 034. The default is to check
the alarms once per second.
Logical Output Lines
:
The logical outputs are supported only with the RLC-Club Deluxe module. The logical outputs
are "open collector" outputs. That means that they can connect the output line to ground (turn it
on) or disconnect it (turn it off). The output lines never output any voltage. The way they are
commonly used is to connect one lead of the coil of a relay (or whatever else you want to
control) to 12 volts and the other lead to an output line. When the output is turned on and
applies a ground, the coil of the relay will be energized and will turn the relay on. The output
line can "sink" (apply a ground of) about 150 milliamps. Connecting an output line directly to a
power supply and turning it on will destroy the output driver IC. Make sure that whatever you
are turning on and off draws less than 150mA.
The output lines can be turned on and off with Commands 093 and 094. You can recall
whether a line is currently on or off with Command 095. If you want to speak a custom
message when you turn an output on or off, program one of the user macros to speak the
message you want, execute Command 038 (to suppress the rest of the voice responses), and
then turn the output line on or off.
Analog Input Lines
:
The analog input lines are designed to read a voltage within the range of 0 to 5 volts.
The RLC-CLUB provides a lot of flexibility in how it reads the analog input lines.
Unfortunately, this also makes things a little bit complicated. Charts have been provided so
that you can use the analog input lines without understanding how all of the math works, but if
you have a unusual application, the RLC-Club can handle that as well. The following
paragraphs explain what some of the options are when reading analog lines. The way you
select from those options is described with the commands themselves.