ST
AR
TUP MANUAL
Startup Manual 2
8-port RS-232/422/485 with and without port-to-port Isolation for UNO-4673A/4683 and ECU-4784
COM Port Configuration
Please follow the below description to set the COM ports,
please also refer to the UNO-4673A/4683’s user manual
for detailed function description:
1. Selection of RS-232 or RS-422/485
COM Port
Jumper
COM Port
Jumper
COM1
CN3
COM5
CN7
COM2
CN4
COM6
CN8
COM3
CN5
COM7
CN9
COM4
CN6
COM8
CN10
RS-232 Jumper Setting (Default)
LED Indicators
There are LED indicators on the front panel of UNO-
4673A/4683 and ECU-4784 for indicating the system
running status. You can know the COM status of ECU-
P1618D/1628D by the consistent slot LED indicators.
2. Switch the RS-485 auto-flow control or RS-422
Master/Slave mode (SW1)
COM Port
DIP of SW1
COM1
DIP1
COM2
DIP2
COM3
DIP3
COM4
DIP4
COM5
DIP5
COM6
DIP6
COM7
DIP7
COM8
DIP8
SW1 Status
Description
0
RS-422: Master mode
RS-485: N/A
1 (Default)
RS-422: Slave mode
RS-485: Auto flow control
3. Setting the Terminal Resistor
COM Port
Jumper
COM Port
Jumper
COM1
JP1
COM5
JP5
COM2
JP2
COM6
JP6
COM3
JP3
COM7
JP7
COM4
JP4
COM8
JP8
Short
Description
1-3
Add 120 Ohm terminal resistor on Tx+/Tx- of RS-422
or Data+/Data- of RS-485
3-5
Add 300 Ohm terminal resistor on Tx+/Tx- of RS-422
or Data+/Data- of RS-485
2-4
Add 120 Ohm terminal resistor on Rx+/Rx- of RS-422
4-6
Add 300 Ohm terminal resistor on Rx+/Rx- of RS-422
LED No.
COM Status
1
COM1 Tx
2
COM1 Rx
3
COM2 Tx
4
COM2 Rx
5
COM3 Tx
6
COM3Rx
7
COM4 Tx
8
COM4 Rx
9
COM5 Tx
10
COM5 Rx
11
COM6 Tx
12
COM6 Rx
13
COM7 Tx
14
COM7 Rx
15
COM8 Tx
16
COM8 Rx
RS-422/485 Jumper Setting
