Network communication, Powerflex 520-series rs784 (dsi) protocol, Network wiring – Rockwell Automation 25B PowerFlex 520-Series Adjustable Frequency AC Drive Quick Start User Manual
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Rockwell Automation Publication 520-QS001A-EN-E - March 2014
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PowerFlex 520-Series Adjustable Frequency AC Drive
Network Communication
PowerFlex 520-Series RS784 (DSI) Protocol
This section contains only basic information to setup the PowerFlex 520-series RS485 (DSI) protocol connection with
your PowerFlex 520-series drive. See the PowerFlex 520-Series Adjustable Frequency AC Drive User Manual, publication
for more information.
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
Network Wiring
Network wiring consists of a shielded 2-conductor cable that is daisy-chained from node to node.
Network Wiring Diagram Example
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.
Esc
Sel
Esc
Sel
Esc
Sel
Esc
Sel
Controller
PowerFlex 520-Series Drives
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”