Campbell CR200 - Digital I;O Ports

Section 2. Quickstart Tutorial
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Figure 6: Pulse Input Wiring -- Anemometer Switch
2.1.10 Digital I/O Ports
The CR200(X) has 2 digital I/O ports selectable, under program control, as
binary inputs or control outputs. These are multi-function ports including:
device driven interrupts, switch closure pulse counting, high frequency pulse
counting, and SDI-12 communications. FIGURE. Control and Monitoring with
Digital I/O (p. 9), illustrates a simple application wherein a port is used to
cont
rol a device while a second port monitors the state of the device.