Emerson Rosemount 5400 Series - Page 196

184
Reference Manual
00809-0100-4026, Rev HA
Appendix A: Reference data
November 2014
Reference Data
Figure A-11. RS-485 with Modbus Communication
External power supply
The input voltage Ui for Modbus is 8-30 Vdc (max. rating).
Power consumption:
 < 0.5 W (with HART address = 1)
 < 1.2 W (incl. four HART slaves)
Figure A-12. Field Wiring Connections
PC 5400 Setup in
Rosemount Radar
Master
PC 5400 Setup in
Rosemount Radar
Master via Tunneling
RS-232 / RS-485 converter
HART modem
Power
Control
system
Rosemount 5400 Series
Transmitter
475 Field
Communicator
Modbus, Levelmaster Emulation
/ RS-485
MODBUS
POWER
HART
(RS-485)
HART to Modbus Converter
MB
MA
-
-
+
+
Ambients > 60 ºC
Use wiring rated
for min 90 ºC
RS-485 Bus
B
A
Power
supply
HART
+
HART -
120:
120:
If it is the last transmitter
on the bus, connect the
120 :
termination
resistor
MODBUS
(RS-485)
v
erter
MB
MA
-
120: