
17 TX
18 RX
RS232
INTERFACE
RX
TX
19 GND
GND
MCT 1302
20 S I/O+
21 S I/O-
External
I/O Board
19
20
MCT 1302
Page 11
CONNECTION WITH ADDITIONAL INPUTS/OUTPUTS BOARD
In applications where additional inputs/outputs are required, optional I/O boards can be connected
using the dedicated serial connection.
To make the connection, use a shielded cable, taking care to connect the screen to ground at only one
of the two ends. If the cable has more conductors than those used, connect the free wires to the screen.
SERIAL RS232
COMMUNICATION
The serial connection cable must have a maximum length of 15 meters (EIA RS-232-C standards), beyond
which it is necessary to adopt the RS485 interface with which the instrument is equipped.
The cable must not be channeled with other cables (i.e. outputs connected to contactors or
power cables), but must possibly follow its own path.
The PC used for the connection must comply with the EN 60950 standard.
The RS232 serial port is normally used for PC, printer and repeater connections.
To make the serial connection, use a suitable shielded cable, taking care to connect the screen to ground
at only one of the two ends.
The serial connection cable must have a maximum length of 100 meters. The cable must
not be channeled with other cables, but must possibly follow its own path
Содержание MCT 1302
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