GSM RTU CWT5005 is designed as a cost effective remote control system alert device. It monitors up to 2 dry contacts and 2 drivable relay outputs. User-defined SMS is sent to pre-configure mobile phone numbers when a pre-defined alarm condition happens. These pre-configured mobile phone numbers can belong to technicians or engineers who are responsible in handling corresponding alarms. With the aid of this GSM RTU, the alarm condition brings attention to in-charge personnel immediately. Besides it allows those mobile phone users to trigger any relay output by using SMS. The output can be connected with alarm indication device, such as alarm, and others.
There is a built-in microprocessor chip running on a real-time operating system. It gives immediate response to any change in both inputs and outputs condition. A GSM modem is embedded in the GSM RTU, user has to subscribe a SIM card for the GSM RTU. The GSM RTU can be installed in any location under GSM coverage.

Advance features
1. Configurable for alarm and recover sms
2. Automatically report the status of itself on schedule
3. Support remote setting via sms commands
4. Preset 10 phone numbers(can be distributed authority)
5. Remote add/edit/delete phone group
6. Automatically update internal clock via sms
7. Time stamped in alarm or recover messages
8. Support ring call when alarm
9. Temperature sensor (optional)
10.Internal battery (optional)
11.Easy used GUI configure software
12.Adopted highly integrated industrial CPU
13.Reliable performance with built-in double watchdog
14.Low maintenance, 24×7 operation

2 digital inputs feature
1. NO or NC type can be preset
2. Configurable for alarm and recover sms
3. Configurable for alarm ensure time
4. Configurable for alarm delay time
5. Configurable for service number's authority of receive inputs alarm
6. Remote query inputs status

2 relay drivable outputs
1. Multiple output type can be preset
2. Remote On/Off/Pulse outputs
3. Configurable for pulse time
4. Remote query outputs status
5. Outputs can be activated by alarm or call
6. Outputs can be activated on schedule

Specifications
DC Power supply: 12-24V DC (Standard adapter: DC 12V/1.5A)
Power consumption: 12V input Max. 150mA/Average 50mA
Frequency range: Quad-frequency 900/1800/850/1900HMz
SIM Card: Supporting 3V SIM Card
Antenna: 50 Ω SMA Antenna interface
Serial: RS232
Temperature range: -30°C ~ +70 °C
Humidity range: Relative humidity 95%
Digital Input: 2 digital inputs(Dry contact)
output: 2 drivable relay outputs(open-collector outputs)
Output drive voltage: Equal to input DC voltage
Output drive power: Drive voltage ≤35V, drive current ≤500mA
Exterior dimension: 88×60×25mm
Weight: 150 g