... (Short Message Service) Or transport data between user and PLC. Another, it can transmit data from apparatus (thermometer, ... monitoring, power transmission system monitoring and other applications. RTU5011 I/O interface>>>>>GSM Controller RTU5010/RTU5011 suitable for: 1. Security ... 16. Unmanned machine rooms;17. Control room application; 18. PLC and Automation, M2M;19. Access Control, Gate Opener, etc ...