CWT5002 modbus io module

CWT5002 GPRS Modbus I/O Module, GSM GPRS Modbus RTU Controller Support 3G version ( skype: glare.wang) We Provide Free GPRS Server Software, Please contact us for more details Advance features 1. Adopted highly integrated industrial CPU 2. Easy used GUI configure software 3. Reliable performance with built-in double watchdog 4. Low maintenance, 24×7 operation 5. Support ring call when alarm 6. Temperature sensor (optional) 7. Internal battery and providing power cut off alarm