MLB-G1101 DTU User Guide
17
Rev 1.1
4 OPERATING NOTE
4.1 Power on the Modem
After plug in power adapter. The modem is usually fully operational within 4 seconds, after
powering it up. Depending on the signal strength of the network in the area, logging into a
network may take longer and is outside the control of the modem.
4.2 Reset to default
Press reset button, it will be reset to default. All of temporary data buffer will be clear.
4.3 External input x2
External signal input source, positive signal are DI1 and DI2, negative signal are COM_1 are COM_2.
Power input range is +12V~+48V, it will be determined as positive. It can be used for alert.
4.4 External Relay x1
Non positive and negative signal relay output, maximum power input voltage range is +48V. It can be
used for beeper.
4.5 DB9 Connector
The RS-232/422/485 connector is DB9 male type, please refer to table 4
4.6 Install SIM card
Please turn to back view, screw open the cover, then you will see SIM card holder. Please use SIM
card faces to PCB board and put it into holder, please screw the cover back. (Please refer to Figure 6)
