5
Model 2203 Combination 16 Input / 16 Output Module Installation Guide
Control Technology Corporation proprietary. Reproduction or distribution forbidden.
System Overview
The Model 2203 I/O module has 16 digital input and output channels. Self-powered inputs
make it easy to interface with many types of sensors and open-collector outputs can drive
solenoid valves and similar loads. The controller’s +24 V supply is available on each I/O
channel for supplying power to output devices and electronic sensors used on the 2203’s
inputs. Each channel also has an independent LED status indicator that simplifies
troubleshooting and setup.
Self-Powered Inputs
The module’s 16 input channels are self-powered. Each input is resistively pulled-up to the
controller’s 24V supply and is activated by an external switch closure to the common for this
supply. This feature allows easy connection to such components as Hall-effect sensors,
proximity sensors (when outfitted with sinking outputs), external electronic sensors that
possess open-collector outputs, and mechanical switches.
Open-Collector Outputs
The module’s 16 output channels are open-collectors and can accommodate many types of 24
VDC load devices. To use these outputs, connect one side of each load device to +24 V and
connect the other side to the open-collector output. When the output is activated under pro-
gram control, it switches to common, completes the circuit, and actuates the device. This
makes it easy to interface with loads such as solenoid valves, indicator lights, small motors,
and motor installers. The current level is limited to 500 mA/output and a total limit of 5A for
the module.
