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The H1700M series digital I/O products provide direct interface to industry standard solid-state relay mounting racks. Use the H1750M to control twenty four relays on one G4PB24 backplane. Use the H1770M to control up to sixty four relays on four PB16 backplanes.
Multiple H1700M digital I/O boards allow a host computer to control thousands of digital I/O points from one serial port.
The digital inputs accept signals up to +0-5Vdc without damage and have TTL logic input switching levels. The digital outputs are open-collector transistors will sink: 15mA making them ideal for controlling solid state relays. The status of digital inputs and digital outputs are communicated to any host serial port in ASCII using either RS-232 or RS-485.
The H1700M digital I/O boards are similar to the H1700 Series but communicates using the Modbus RTU protocol.
