Emerson Rosemount 5402 Reference Manual page 220

Reference Manual
00809-0100-4026, Rev KC
™
Emerson Wireless THUM
The optional THUM Adapter can be mounted directly on the
transmitter or by using a remote mounting kit. IEC 62591
®
(WirelessHART ) enables access to multi-variable data and
diagnostics, and adds wireless to almost any measurement
point. See the Wireless THUM Adapter
and Technical Note.
Figure A-2. THUM Adapter
External power supply
The input voltage UI for HART is 16-42.4 Vdc (16-30 Vdc in
IS applications, and 20-42.4 Vdc in
Explosion-proof/Flameproof applications).
Figure A-3. External Power Supply

R Load Resistance ( )
U External Power Supply Voltage (Vdc)
E
U Input Voltage (Vdc)
I
IS Electrical parameters
See "Product Certifications" on page
Signal on alarm (configurable)
High = 21.75 mA (standard Rosemount setting)

Low = 3.75 mA (option code C8)

Namur NE43: High = 22.5 mA (option code C4)

Specifications and Reference Data
™
Adapter
Product Data Sheet
R
U
E
U
I
241.
Specifications and Reference Data
Saturation levels
Standard: Low=3.9 mA, High=20.8 mA

Namur NE43: Low = 3.8 mA, High = 20.5 mA

Rosemount Alarm Level
Normal operation
(1)
3.75 mA
4 mA
3.9 mA
low saturation
1. Transmitter failure, hardware or software alarm in Low position.
2. Transmitter failure, hardware or software alarm in High
Load limitations
Maximum load resistance (R) is determined by the voltage
level of the external power supply (U
Non-Hazardous Installations:

Maximum Load Resistance R(
1400
1387
1200
1000
800
600
586
400
200
24
10 16 20
Intrinsically Safe Installations:

Maximum Load Resistance R(
1400
1200
1000
847
800
600
586
400
200
24
10 16 20
October 2018
21.75 mA
20 mA
20.8 mA
high saturation
), as described by:
E
)
Operating
region
42.4
30 40
External Power Supply Voltage U
)
Operating
region
30 40
External Power Supply Voltage U
(2)
50
(V)
E
50
(V)
E
206