CWT(HK) Co., Limited
M2M The internet of things. Keeping your assets connected.
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1- SMS Temperature High / Low Alarm
2- SMS Power Failure Alarm
3- GPRS Temperature Realtime Data Logger
4- Support 4 DS18B20 Temperature Data Logger
4 temperature inputs feature
DS18B20 special input, 4 channels
Temperature rang -55°C ~ +125 °C
Preset high and low level to alarm
Current temperature can be query by sms
GPRS feature
Support connects 4 servers, the servers must connect internet and have static public IP address or Dynamic Domain name
GPRS Transmission base on TCP/IP
Support modbus TCP protocol or CWT_IO protocol
4 digital inputs feature
Upload status to server when inputs are triggered
Upload inputs status to server on schedule
Remote query inputs status by GPRS or SMS
Support SMS alarm
Configurable for alarm and recover sms
4 analog inputs feature
Can preset normal range for AD input, upload data to server when above the normal range.
Current values can be query by server or sms
Configurable for alarm and recover SMS
Support offset and gain
Specifications
| Parameter | |
| DC Power supply | 9-28V DC (Standard adapter: DC 12V/1.5A) |
| Power consumption | 12V input Max. 150mA/Average 50mA |
| Frequency range | Dual-frequency 900/1800/850/1900Mhz |
| 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 | 4 digital inputs(Dry contact) |
| output | 4 drivable relay outputs(open-collector outputs) |
| Output drive voltage | Equal to input DC voltage |
| Output drive power | Drive voltage ≤35V, drive current ≤500mA |
| Analog Input | 4 analog inputs(4~20mA or 0~5V) |
| Temperature input | 4 DS18B20 inputs (temperature range -55°C ~ +125 °C ) |
| memory | 256K |
| Audio interface | 3.5mm audio in and audio out |
| Exterior dimension | 130×80×25mm |
| Weight | 370 g |