Rs485 (dsi) protocol, Network wiring, Appendix c – Rockwell Automation 25B PowerFlex 520-Series Adjustable Frequency AC Drive User Manual User Manual
Page 189: Appendix
Rockwell Automation Publication 520-UM001G-EN-E - September 2014
189
Appendix
C
RS485 (DSI) Protocol
PowerFlex 520-series drives support the RS485 (DSI) protocol to allow efficient
operation with Rockwell Automation peripherals. In addition, some Modbus
functions are supported to allow simple networking. PowerFlex 520-series drives
can be multi-dropped on an RS485 network using Modbus protocol in RTU
mode.
PowerFlex 520-Series Drive Network
For information regarding EtherNet/IP or other communication protocols, refer
to the appropriate user manual.
Network Wiring
Network wiring consists of a shielded 2-conductor cable that is daisy-chained
from node to node.
Network Wiring Diagram Example
Controller
Esc
Sel
Esc
Sel
Esc
Sel
Esc
Sel
ATTENTION: Never attempt to connect a Power over Ethernet (PoE) cable to the
RS485 port. Doing so may damage the circuitry.
IMPORTANT
The shield is connected at ONLY ONE end of each cable segment.
C1 C2
Master
4
5
TxRxD-
TxRxD+
TxRxD-
TxRxD+
TxRxD-
TxRxD+
Shield
Shield
Shield
120 ohm resistor
120 ohm resistor
X
X
X
FRONT
PIN 8
PIN 1
TxRxD-
TxRxD+
RS485
(DSI)
AK-U0-RJ45-TB2P
V/T2
T/L3
S/L2
R/L1
U/T1
W/T3
BR+
BR-
DC- DC+
C1 C2
TxRxD-
TxRxD+
RS485
(DSI)
V/T2
T/L3
S/L2
R/L1
U/T1
W/T3
BR+
BR-
DC- DC+
PowerFlex 525
Node 1
4
5
PowerFlex 523
Node 2
4
5
PowerFlex 525
Node “n”