Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 Installation Instructions, PRIOR to Firmware rev. 3.0 User Manual
Page 40
Publication 1404-IN007D-EN-P - October 2004
40 Powermonitor 3000
Figure 31 RS-485 Connections
150
Ω
Terminating
Resistor
(See Note 2)
150
Ω
Terminating
Resistor
(See Note 2)
Shield Connection
(See Note 4)
IBM Compatible PC
Or
PLC Processor
Or
SLC Processor
Or
ControlLogix Processor
Notes:
1) 3-device network portrayed. Up to 31 DF1
Slave Devices can be connected to a
DF1 Master without the use of a repeater
2) Terminating resistors may be required for
networks with long distances or high noise
environments. Consult the RS-232 to RS-485
converter manufacturer for more information.
3) Examples:
B & B Electronics
Part Number 485SD9TB (DB9).
Allen-Bradley Cat. 1761-NET-AIC.
4) Shields should be connected at
one end only to avoid ground loops.
Powermonitor 3000 Device #1
Powermonitor 3000 Device #2
Powermonitor 3000 Device #3 (Last)
RS-485
RS-485
RS-485
External
RS-232C to RS-485
Converter
(See Note 3)
SHLD
SHLD
_
+
SHLD
_
+
SHLD
_
+
A
B
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