DD2050
1-33
COM4
serial connection
6-pin spring terminal board
PIN
DESCRIPTION
1
Rx422-
2
Rx422+
3
Tx422-
4
Tx422+
5
TERMINATOR
6
GND
•
If the COM4 serial port is configured in compliance with the RS422 standard, proceed as follows:
provide a jumper between pin 2 and pin 5 to connect the termination resistor.
ATTENTION
Max. conditions of usage under RS422 standard:
Max. transmission distance: 1200 m
Maximum voltage at ends: +/- 7V
For connection to external devices, it is recommended to use a twisted pair, making sure to
connect the shield to the metal part of the 9-pin connector's casing.
RS485 connection on DSUB9 connector
If the COM5 serial port is configured in compliance with the RS485 standard,
proceed as follows:
Connect pins 9 and 6 (DATA +) pins 1 and 7 (DATA -) together.
Provide a jumper between pin 6 and pin 8 to connect the termination resistor;
this operation must be performed on the first and last of the devices
connected together.
RS485 connection on terminal board
If the COM4 serial port is configured in compliance with the RS485
standard, proceed as follows:
Connect pins 2 and 4 (DATA +) pins 1 and 3 (DATA -) together
