Device
and operation
CPC307
C P C 3 0 7 U s e r M a n u a l
81
© 2 0 2 2 F a s t w e l v . 0 0 6
Table 4.36. Description of setting the jumpers to the XP18 connector for module versions older than 4.
х
Jumper state
Function
1 - 2
When the jumper is set to TX+/TX- line of COM1 interface (in RS-422/485
mode), a 120 Ohm terminating resistor is connected.
3 - 4
When the jumper is set to RX+/RX- line of COM1 interface (in RS-422/485
mode), a 120 Ohm terminating resistor is connected.
5 - 6
When the jumper is set to TX+/TX- line of COM2 interface (in RS-422/485
mode), 120 Ohm terminating resistor is connected.
7 - 8
When the jumper is set to RX+/RX- line of COM2 interface (in RS-422/485
mode), a 120 Ohm terminating resistor is connected.
Table 4.37. Description of setting the jumpers to the XP18 connector for module versions 4.
х
Jumper state
Function
1 - 2 and 9 - 10
When the jumper is set to TX+/TX- line of COM1 port (in RS-422/485 mode), a
120 Ohm terminating resistor is connected.
3 - 4
When the jumper is set to the RX+/RX- line of COM1 port (in the RS-422/485
mode), a 120 Ohm terminating resistor is connected.
1 - 2
TX of COM1 port is pulled up through the 680 Ohm resistor to a
supply voltage of +5V to generate the +200 mV offset on Y/Z lines.
9 - 10
Signal -TX of COM1 port is pulled up through the 680 Ohm resistor to ground
GND to generate the -200 mV offset on the Y/Z lines.
5 - 6 and 11 - 12
When the jumper is set to TX+/TX- line of COM2 port (in RS-422/485 mode), a
120 Ohm terminating resistor is connected.
7 - 8
When the jumper is set to RX+/RX- line of COM2 port (in RS-422/485 mode), a
120 Ohm terminating resistor is connected.
5 - 6
TX of COM2 port is pulled up through the 680 Ohm resistor to a supply
voltage of +5V to generate the +200 mV offset on the Y/Z lines
11 - 12
Signal -TX of COM2 port is pulled up through the 680 Ohm resistor to GND to
generate the -200 mV offset on the Y/Z lines
Table 4.38 Description of setting the jumpers to the XP20 connector for module versions lower than 4.
х
Jumper state
Function
1 - 2
When the jumper is set to the TX+/TX- line of the COM6 interface, a 120 Ohm
terminating resistor is connected.
3 - 4
When the jumper is set to the RX+/RX- line of the COM6 interface, a 120 Ohm
terminating resistor is connected.