Technical Manual MIVI 9612
Réf. 254-30/0
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6.
Communication
6.1. RS232 interface
2 RS232 ports are available. The RS232 ports are located on the side of the processor.
Serial ports type : RJ-11.
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Caution :
- Turn off the power before making communication connections.
- Do not connect the controller directly to a telephone or a telephone line.
- The RS232 port is not isolated.
- Signals are related to the processor 0V, this is the same 0V used by the power supply.
•
Characteristics :
Speed
COM 1
COM 2
300 à 57600 bps 300 à 115 200 bps
Voltage limits : ± 20V
Pin number
Function
1
DTR signal*
2
0V reference
3
TxD signal - transmission
4
RxD signal - reception
5
0V reference
6
DSR signal*
6.2. RS485 interface
RS485 port is used to make the connection between the transmitter and the device.
Used COM port : COM 3.
Serial port type : RJ-11.
•
Caution :
- The RS485 serial port is not isolated. If the controller is used with a non-isolated external
device, avoid potential voltage that exceeds ± 10V.
To avoid damaging the system, all non-isolated device ports should relate to the same
ground signal.
- Turn off power before making communications connections.
- Do not connect the controller directly to a telephone or a telephone line.
- Use shielded, twisted pair cables.
- Minimize the length of the connection cables. The length should not exceed 1200 m.
- Do not cross A and B signals (positive terminals must be wired to positive, and negative
terminals to negative).
