RTU is a kind of SMS alert device for remote control system
Adopts industrial GSM module and high performance 32 bits processor
only need to connect it with monitoring sensor terminal and electrical equipments
Users can realize some remote control functions, such as remotely control and data measure for terminal equipments, equipment fault alarming and more
This system in based on the monitoring, measuring and alarming for SMS
It make PC mobile link with distance measuring equipment to remotely collect and monitor data via mobile communication technology
Users can use mobile to check meter and monitor measuring equipments at any time and any place

Remote data, alarming and state information can be send to many remote places for synchronous display
Key features:
4 analog signal (4 to 20mA) inputs
One voltage measurement port
Reliable performance with built-in double watchdog
Can be operated from anywhere and no distance limit
Two-way voice communication by external microphone and speaker
Automatic device condition report through SMS every 24 hour interval
Supports armed/disarmed, inquiry status, switch on or off relay output by SMS commands

User defined alarm condition (normally close or open), alarm and recovery SMS message for each alarm point
One maximum of 8 mobile phone numbers can be programmable
Can be set up and programmed from PC programmer by USB cable
Specifications:
DC power supply: 9 to 28V DC (standard adapter: 12V DC/1.5A)
Power consumption: 12V input (maximum) at 150mA/50mA (average)
Frequency range: Quad band 900/1800/850/1900MHz
Antenna: 50Ω SMA antenna interface
Temperature range: -30 to 70° C

Humidity range: Relative humidity 95%
Digital inputs: 12 digital input (dry contacts, NC, NO)
6 built-in relay outputs (12V) at drive electricity < 10.0A
Serial: USB
Exterior dimensions: 147 x 65 x 95mm