Overview

The Automation & Electronics SDIO was designed to provide digital input and digital output expansion capability for Programmable Logic Controllers (PLCs). With a low power requirement and a wide operating temperature range, the SDIO is ideal for use in remote 120 V_AC, 24 V_DC, or solar powered distributed I/O systems. It can also be used as a stand-alone MODBUS digital input and digital output module.

The SDIO is a microprocessor based 48-channel digital input and 48-channel digital output card. The inputs from this card can be connected to the DIF8, DIF16 or equivalent input cards. The outputs can be connected to the PRO4, PRO8 or FCTB output cards. The onboard microprocessor monitors the status of the inputs, controls the outputs, and makes them available to either host systems or master controllers via a serial data highway.

The data highway is implemented using the built in RS-485 serial port. All of the Smart Card series can be daisy chained together using these serial ports. Each Smart Card responds to MODBUS polls or commands from a master. An onboard address selector switch allows each card to be easily configured for any MODBUS address. This RS-485 data highway can then be used to create a scalable, flexible input / output expansion array.

Features