SAMUEL
2019-9-20
CHONGHAN CH-M3 WIRELESS MODEM USER MANUAL
页
9
485/TTL interface.
CH-M3 series wireless modem adopts industrial level modules, specially designed for the
complicated industrial environment which compatible with EMC, and will be your best choose of
wireless communication.
2.1.
Features
AT command interface
Support GPRS/LTE
Support Voice, SMS and CSD
Dial up, data communication
Support APN or VPDN
LED: power, ring, data
Interface level: RS232/RS485/TTL
Watchdog(software and hardware)
Steel shell for anti-electromagnetic interference
2.2.
Application
Remote Data Monitor and Control
Water, gas and oil flow metering
AMR (automatic meter reading)
Power station monitoring and control
Remote POS (point of sale) terminals
Traffic signals monitor and control
Fleet management
Power distribution network supervision
Central heating system supervision
Weather station data transmission
Hydrologic data acquisition
Vending machine
Traffic info guidance
Parking meter
Telecom equipment supervision (Mobile base station, microwave or optical relay station)
Oil field data acquisition
Warehouse supervision
3.
Device Connection
Interface
Description
Outlook
LED
PWR
RING
DATA
Antenna
50Ω/
SMA/Female
Power
Φ
5.5mm/2.5mm, 5~48V (suggest12V)
Serial Port
DB9 (RS232/RS485/TTL)