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The RLC-2 offers 8 logical control lines for site control. Because the output lines are open collector,
the user will not measure any voltage on the output lines, only an open or a ground. In order to check the
condition of the control lines, a meter set to resistance will be needed. The meter will read an open when the
control line is off and a virtual ground when the control line is on. When using a semiconductor device as a
latch, certain current limitations are imposed. The Output used can sink (apply a ground), of 150mA. If this
current is exceeded, the Output will short and destroy the device. See figure below on how to connect a
relay to one of the output lines. (See Command Listing for output control line commands).
Relay Interfacing
to a Control Line
Logical Latched Output Lines
Pin-Out Logical Latched Outputs P2 Connector
1 - Ground
2 - Output #8
3 - Output #6
4 - Output #4
5 - Output #2
6 - Output #7
7 - Output #5
8 - Output #3
9 - Output #1
Copyright 1995 Link Communications Inc.
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