Universal User Interface

4x20 Alphanumeric LCD Display
Environmentally sealed 4x4 keypad
I2C, RS485, or RS232 serial interface
Keystroke announced by dedicated interrupt line & serial communication.

Solid State
Ground Fault Current Interrupter

Three functions in one: 

Ground Fault current interrupter
Line integrity monitoring
Load current monitoring and short circuit protection

Parallel Port Amplifier/Dongle

Three Functions in one:

64-bit software authentication
Parallel port signal amplification
Automatically disables all outputs at power-up