Interface Definition - Caimore CM550-5 Series User Manual

1.3.2 Interface Definition

Interface as follows:
Definition of Interface:
NO. Name Function
1 PWR
2 GND
3 EN Enable Pin
4 D/RX
5 D/TX RS232(Debug)
6 GND
7 A
8 B (Communicating)
9 U/RX
10 U/TX
(Communicating)
11 GND
12 DIG
13 DI1
14 DI2
15 DI3/C
Switch Input
16 DI4/C
/ Counter Input
17 DI5/C
18 DI6/C
19 DI7/C
20 DI8/C
Power input positive pole, built-in power inverter protection and
overcurrent protection, voltage range DC 6V to DC 32V.
Power
Power input negative pole
During the normal operation of RTU, when the Power input pin
positive voltage is applied to this pin (the same voltage as PWR pin),
the entire RTU will be cut off and the Power lights will go out. When
the pin is applied with 0V voltage or suspended, the RTU is normally
energized.
Data receiver pin
Data sender pin
Ground
RS485 communication interface positive pole
RS485
RS485 communication interface negative pole
Data receiver pin
RS232
Data sender pin
Ground
Ground
Switch input 1~8
Input range: low level is 0-3.3V, high level is
5-30V
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Default Function
4
Extension
Ground
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Counting channel 1~6
Counting frequency is 0~1KHz
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