21
PORT 2
(RS232/422/485 – communication)
•
The Port is optically-isolated, used for data exchange.
•
Maximal isolating voltage 60Vrms.
•
Operating mode selected by configuration application.
Description
pin
Description
TXD
transmitter output
RXD
receiver input
COM
interface common ground (GND)
RT
terminator – if necessary connect to RD+
RD+,
RD-
for RS485 (transmitter, receiver), for RS422 (receiver)
SD+,
SD-
for RS422 (transmitter)
For RS232 mode the length of the cable should not exceed 15 m.
NOTICE!
•
Supply cables length < 10 m
•
Signal cables length < 30 m
•
For longer cables it is recommended to use external overvoltage protection.
Содержание MT-101
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