... -24V),4 Analog Inputs and up to 8 NC/NO inputs and RS232 Serial Port. It allows you to ... from RTU5010 is the GSM Controller RTU5011with 8 Digital NC/NO inputs,8 relay drivable Outputs, 4 Analog inputs, ... RTU5010/RTU5011:>>UP TO 8 NC/NO inputs, connect dry contact NC NO device>>UP TO 8 Relay outputs ... Samchinese New Upgrading,GSM SMS Controller,RTU5011,Temperature UP DOWN remote control,24V DC Switch,NC ...