This manual provides operating instructions for the HI 504903 GSM Supervisor product.
The Hanna Instruments HI504903 is an intelligent interface designed to connect HI142 temperature dataloggers via an RS485 port to an industrial GSM cellular phone for sending SMS messages or connecting to a computer. The device also supports a digital input for non-intelligent instruments and a digital output signal. It is available in two models: HI504903-1 for 900/1900 MHz GSM and HI504903-2 for 900/1800 MHz GSM, each with specific power supply requirements.
| RS485 connection limit | up to 31 HI142 temperature dataloggers |
|---|---|
| RS485 baud rate | 1200 bps |
| RS232 baud rate | up to 9600 |
| Backup battery | 12V / 0.8Ah |
| Operating temperature | 0 to 50 °C |
| Dimensions | 240 x 200 x 98 mm |
The interface is warranted for two years against defects in workmanship and materials.
No, you should unplug and turn off the unit in hospitals or near medical devices like pacemakers or hearing aids.
The internal rechargeable backup battery provides power supply in case of mains power failure.