... provides multi digital relay outputs(120VAC/3A, 24VDC 3A,), upto 6 digital inputs(Opto-isolated,Active Contact, 3~24VDC, Completely ... , is a low cost, wireless M2M, wireless data logger, universal GSM GPRS Engine which can remote control outputs, transmit and receive ... remote control machine, etc. An automation system. Each input can link to output actions, this is very useful when the temperature ...