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SNK
SRC
Esc
Sel
RUN
FWD
REV
VOLTS
AMPS
HURTS
&
REALLY
FAULT
PROGRAM
R/L1 S/L2 T/L3
U/T1 V/T2 W/T3 DC+ DC-
9.8 - Setup and wiring: Allen-Bradley
®
PowerFlex
®
4, 4M, & 40 VFDs (Powerfoil
®
& Wickerbill fans) (cont.)
Ref. Line (Blue w/WHT)
Bare Drain Lead
Modbus Cable
Data Loop In
Modbus Cable
Data Loop Out if applicable
(See note above regarding EOL resistor)
MBA (+) Orange w/WHT
MBB (-) White w/ORG
RJ45 Port
RJ45 / Screw Terminal Adapter
It is important that the last device connected on a
run of Modbus cable (single or multiple devices)
includes an EOL resistor to maintain proper cable
impedance as shown.
120Ω 1/4W
Resistor
RS-485 shield
Term. #16 PF4 & PF4M
Term. #19 PF40
Note: The wire colors shown above are applicable to Belden 3106A Modbus cable only. Other cable types may differ. Take note of
color/polarity if using a different model of cable.
GRAY
BLUE W/ WHT
ORG W/ WHT
WHT W/ ORG
9 - Big
Ass
Fans Electrical Installation (cont.)
RJ45 to Modbus Connector
Note: The connector and
resistor are part of a data
kit that is provided with the
BACnet adapter.