M240 V4 Series IP MODEM User Manual
Add：Floor 14,A06 building, No.370,Chengyi Street,Jimei District, Xiamen,China.
Web: www.yifanwireless.com H86 592 6101492 Fax：+86 592 5222813
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Installation of cable
M240 V4 adopts industrial terminal block interface, the recommendatory cable is 28-16AWG.
Adapter
（
Rating Output 12VDC/0.5A
）
Cable Color
Power Output Polarity
Black&White
Anode
Black(with letters)
Cathode
RS232 Cable
Cable Color
DB9-M Pin Number
Brown
Pin 2
Blue
Pin 3
Black
Pin 5
RS485 Cable(optional)
Cable Color
Signal definition
Red
RS485(A)
Black
RS485(B)
Power adapter and communication cable connection
2.4 Power
The power range of the IP MODEM is DC 5~36V
We recommend user to use the standard DC 12V/0.5A power adaptor.
Warning: When we use other power, we should make sure that the power can supply power
above 6W.(Ripple is less than 300mV, and ensure that the instantaneous voltage does not
exceed 36V)
M240 V4
M240 V4
User(DB9
male)
User
1
2
3
4
5
6
7
8
9
10
11
12
RX
GND
TX
A
B
IO1
IO2
IO3
ADC1
PWR
GND
ADC2
1
2
3
4
5
6
7
8
9
GND
TX
RX
+
Power +
- Power -
RX
111
11
1
2
3
4
5
6
7
8
9
10
11
12
RX
GND
TX
A
B
IO1
IO2
IO3
ADC1
PWR
GND
ADC2
+
Power +
-
Power -
A
B
RS232
RS485
