Emerson Rosemount 5402 - Establishing HART Communication; Connecting to MA;MB Terminals for HART

80
Reference Manual
00809-0100-4026, Rev KC
Operation and Maintenance
October 2018
Operation and Maintenance
4.9.3 Non-intrinsically safe power supply
With a non-intrinsically safe power supply in non-hazardous installations or explosion-proof/flameproof
installations, wire the transmitter as shown in Figure 4-5.
Note
Make sure the power supply is off when connecting the transmitter.
Figure 4-5. Wiring for Non-Intrinsically Safe Power Supply (HART)
The Field Communicator and the HART modem require a minimum load resistance of 250 within the
loop to function properly.
Note
The diagram is valid only if the HART load resistance is at the + side and if the - side is grounded,
otherwise the load resistance value is limited to 435 .
Note
For explosion-proof/flameproof installations make sure the transmitter is grounded to the I.S. ground
terminal inside the terminal compartment in accordance with national and local electrical codes.
A. Rosemount 5400 D. HART modem
B. Field Communicator E. PC
C. Load Resistance 250  F. Power supply
A
B
C
D
F
E