SJ700
2
Inverter
Appendix B
B–3
Serial Connection
Diagrams
The serial connector is to the left of the control logic connector as shown below:
Each device requires just two connections in parallel for data transmission and reception.
Additionally, the device at each physical end of the wiring requires a termination resistor. The
SJ700
2
has built-in termination resistors that become part of the circuit when you add a jumper
as shown. The termination resistor helps to suppress electrical reflections.
TIP:
Each slave device on the serial network must have a unique node address, set by parame-
ter C072. If this is a new application, we recommend connecting one new device at a time and
checking the communications after each addition.
SP SN RP SN
Serial
Communications
Connector
Send/receive (+) Positive
Send/receive (–) Negative
Termination resistor (+)
Termination resistor (–)
SP SN RP SN
SP SN RP SN
SP SN RP SN
Termination jumper
Send/receive (+)
Send/receive (–)
SJ700
SJ700
SJ700