M240 series Serial to GPRS modem for automatic Meter Reading
M240 Series Serial to GPRS modem (DTU) with I/O
M240 series Serial to GPRS modem (DTU) is a kind of cellular terminal device that provides data transfer function by public GPRS network.
It adopts high-powered industrial 32 bits CPU and embedded real time operating system. It supports RS232 and RS485 (or RS422) port that can conveniently and transparently connect one device to a cellular network, allowing you to connect to your existing serial devices with only basic configuration. It has low power consumption, 1ower than 1mA@12VDC. It has compatible digital I/O channel, ADC, input pulse counter and pulse wave output function.
Ideal for M2M fields, smart grid, industrial automation, telemetry, finance, POS, water supply, environment protection, post, weather, etc.
Product Specification
High-performance
Support TCP server and support multi TCP client connection(optional)
Support double data centers, one main and another backup
Supply 5 I/O channels, compatible 2 Digital input/output, 2 analog inputs and one pulse input counters.
Support multi data centers and it can support 5 data centers at the same time
Support multi online trigger ways, including SMS, ring and data. Support link disconnection when timeout
Support dynamic domain name(DDNS) and IP access to data center
Design with standard TCP/IP protocol stack
Support APN/VPDN
Cellular Specification
Item | Content |
Cellular Module | Industrial cellular module |
Standard and Band | GSM850/900/1800/1900MHz Compliant to GSM phase 2/2+ GPRS class 10, class 12(optional) |
Bandwidth | 85.6Kbps |
TX power | GSM850/900: <33dBm GSM1800/1900: <30dBm |
RX sensitivity | <-107dBm |
Hardware System
Item | Content |
CPU | Industrial 32 bits CPU |
FLASH | 512KB (Extendable) |
SRAM | 256KB(Extendable) |
Interface Type
Item | Content |
Serial | 1 RS232 port and 1 RS485(orRS422) port, 15KV ESD protection Data bits: 5, 6 ,7, 8 Stop bits: 1, 1.5, 2 Parity: none, even, odd, space, mark Baud rate: 110~230400 bps |
Indicator | "Power", "ACT", "Online" |
Antenna | Standard SMA female interface, 50 ohm, lighting protection(optional) |
SIM/UIM | Standard 3V/1.8V user card interface, 15KV ESD protection |
Power | Terminal block interface, reverse-voltage and overvoltage protection |
 | |
Power Input
Item | Content |
Standard Power | DC 12V/0.5A |
Power Range | DC 5~35V |
Power Consumption
Working States | Power Consumption |
Communication | 50-80mA@12VDC; 115-150mA@5VDC |
Standby | 20mA@12VDC; 35mA@5VDC |
Sleep | 8mA@12VDC; 18mA@5VDC |
Timing Power Off | 0.6mA@12VDC; 1mA@5VDC |
Physical Characteristics
Item | Content |
Housing | Iron, providing IP30 protection |
Dimensions | 91x58.5x22 mm |
Weight | 205g |
Environmental Limits
Item | Content |
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Operating Temperature | -35~+75ºC (-31~+167℉) |
Storage Temperature | -40~+85ºC (-40~+185℉) |
Operating Humidity | 95% ( unfreezing) |
Selection and Ordering Data
M240 Series Cellular Modem 1 x RS232/RS485, 5 x I/O
Model No. | Description |
M240-H | 3G HSPA+/HSUPA/WCDMA/UMTS Modem |
M240-EV | CDMA2000 EVDO Modem |
M240-E | EDGE Modem |
M240-G | GSM/GPRS Modem |
Accessories for the modem:
On-Site Pictures
1.What kind of payment do you usually use?
T/T, L/C, Credit Card, Western Union and Paypal are all available.
2.How long will you delivery the goods after payment?
For samples, we usually delivery the goods within 3 days.
3.How many days can I get the goods?
It takes approximate 4-5 days if send by courier/air.
4.What kind of certificate your product pass?
Certificate:CE,RoHS,FCC.
5.Can you do OEM/ODM?
OEM/ODEM are welcomed.
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