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SJ200 Inverter
Appendix B
B–3
Connecting the Inverter to ModBus
Follow the steps in this section to connect the inverter to the ModBus network.
1. Keypad Removal - The inverter keypad uses the serial communications interface
connector on the front of the inverter. To access the RJ45 modular connector, you will
need to remove the keypad. Refer to “
Inverter Keypad Removal and Installation” on
page 2–3 for detailed instructions.
2. Modular Interconnect Removal - With the keypad removed, locate the RJ45
modular interconnect, the clear plastic connector in the opening as shown below.
Press downward on the locking tab at the top of the connector, releasing it for
removal. Be sure to keep it in a secure place; you may need it in the future for placing
the keypad on the inverter again. The RJ45 modular jack that remains will new accept
the serial communication cable.
3. Cable Wiring - The inverter communications
port uses RS485 differential transceiver. The
pinout is shown to the right and listed below. Be
sure the cable connection you make matches the
diagram.
Pin Symbol Description
1 — Not used. Do not connect
2 — Not used. Do not connect
3 — Not used. Do not connect
4 — Not used. Do not connect
5 SP Send/Receive data Positive
6 SN Send/Receive data Negative
7 — Not used. Do not connect
8 — Not used. Do not connect
RJ45 modular
interconnect /
communications
connector
Keypad bay
S
N
1
S
P
2345678
Not usedNot used
SJ200