The EXP-RELAY expansion board is an output module that features 6 General Purpose Relays rated at 6A 250VAC. The board enables developers to control motors, fuel pumps, industrial applications where control of high voltages and currents is intended for controlling large power loads. Zerynth expansion boards work seamlessly with all of the Zerynth Development boards. Combined, they can act as a Development Board for prototyping a Product, and a core for industrial applications.