Specifications and Reference Data
October 2018
Reference Manual
00809-0100-4026, Rev KC
Specifications and Reference Data
206
Emerson
™
Wireless THUM
™
Adapter
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 Product Data Sheet
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
IS Electrical parameters
See “Product Certifications” on page 241.
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)
Saturation levels
Standard: Low=3.9 mA, High=20.8 mA
Namur NE43: Low = 3.8 mA, High = 20.5 mA
Load limitations
Maximum load resistance (R) is determined by the voltage
level of the external power supply (U
E
), as described by:
Non-Hazardous Installations:
Intrinsically Safe Installations:
R Load Resistance ()
U
E
External Power Supply Voltage (Vdc)
U
I
Input Voltage (Vdc)
1. Transmitter failure, hardware or software alarm in Low position.
2. Transmitter failure, hardware or software alarm in High
3.75 mA
(1)
21.75 mA
(2)
4 mA
20 mA
3.9 mA
low saturation
20.8 mA
high saturation
Rosemount Alarm Level
Normal operation
10 20
16
30
200
400
600
800
1000
1200
1400
40 50
42.424
586
1387
External Power Supply Voltage U
E
(V)
Maximum Load Resistance R(
)
Operating
region
10 20
16
30
200
400
600
800
1000
1200
1400
40 50
24
586
847
External Power Supply Voltage U
E
(V)
Maximum Load Resistance R(
)
Operating
region
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