The I-8437-80/8837-80, I-8417/8817 is an ISaGRAF PAC and includes ISaGRAF SoftLogic, ISaGRAF is a Windows programming tools and also provides powerful debugging tools including On-line Motoring and Control and also Off-line Simulation. There are more than 300 function blocks built-in the PAC for various Industrial Applications including PID, motion, remote IO, serial communication, SMS, retain variable, scaling, etc.

In hardware, I-8xx7 has 3 or 4 serial ports, support Modbus RTU slave protocol and it can easily communicate with PC/HMI/OPC Server and Touch panel. The I-8xx7 also supports up to 2 COM ports of Modbus RTU / ASCII master protocol to integrate with other Modbus devices. The I-8x37-80 has one 10M Ethernet port.

The I-8xx7 supports various High/Low profile I/O modules. The user can choose Local I/O modules：I-8K/I-87K I/O modules and RS-485 Remote I/O modules：I-7000 or expansion units (I-87Kn or RU-87Pn) plugged with I-87K serial I/O modules. Compared to I-8437/8837 (It has phased out), I-8x37-80 is 2 ~ 4 times faster!