Rosemount 775 Quick Start Guide
Quick Start Guide
00825-0100-4075, Rev GB
Emerson™ Wireless THUM™ Adapter
June 2017
Quick Start Guide
June 2017
NOTICE
This guide provides basic guidelines for the Wireless THUM Adapter. It does not provide instructions for
detailed configuration, diagnostics, maintenance, service, troubleshooting, or installations. Refer to the THUM
Adapter Reference Manual
Emerson.com/Rosemount
This device complies with Part 15 of the FCC Rules. Operation is subjec t to the following conditions. This device
may not cause harmful interference. This device must accept any interference received, including interference
that may cause undesired operation.
Explosions could result in death or serious injury.
Installation of this transmitter in an explosive environment must be in accordance with the appropriate local,
national, and international standards, codes, and practices. Review the Product Certifications section for any
restrictions associated with a safe installation.
Before connecting a Field Communicator in an explosive atmosphere, ensure the instruments are installed
in accordance with intrinsically safe or non-incendive field wiring practices.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical
shock.
This device must be installed to ensure a minimum antenna separation distance of 7.87-in. (20 cm) from all
persons.
for more instruction. The manual and this guide are also available electronically on
.
During normal operation, or in fault condition, the THUM Adapter will cause a 2.5 V drop in the conn ected loop.
It is important to ensure that the power supply can provide at least 2.5 V more than the minimum operating
voltage of the wired device to make sure it works properly with the THUM Adapter installed. To determine the
minimum operating voltage for the wired device, review the wired device operation and installation manual.
Contents
Wireless considerations . . . . . . . . . . . . . . page 3
Bench top configuration . . . . . . . . . . . . . . page 5
Physical installation . . . . . . . . . . . . . . . . . . page 6
Direct mount . . . . . . . . . . . . . . . . . . . . . . . page 6
Remote mount . . . . . . . . . . . . . . . . . . . . . . page 7
Device network configuration . . . . . . . . page 20
2
AMS Device Manager . . . . . . . . . . . . . . . page 20
Field Communicator . . . . . . . . . . . . . . . . page 21
Loop current test . . . . . . . . . . . . . . . . . . . page 21
Verify operation . . . . . . . . . . . . . . . . . . . . page 23
Reference information . . . . . . . . . . . . . . page 24
Product Certifications . . . . . . . . . . . . . . . page 25
June 2017
1.0 Wireless considerations
1.1 Power up sequence
Power should not be applied to any wireless device until the Wireless Gateway
(“Gateway”) is installed and functioning properly. Wireless devices should also
be powered up in order of proximity from the Gateway, beginning with the
closest. This will result in a simpler and faster network installation. Enable Active
Advertising on the Gateway to ensure that new devices join the network faster.
For more information see the Wireless Gateway Reference Manual
1.2 THUM Adapter position
THUM Adapter should be positioned vertically straight up, and should be
approximately 3 ft. (1 m) from any large structure, building or conductive
surface to allow for clear communication to other devices. If the THUM Adapter
is mounted horizontally wireless communication range may be decreased. The
THUM Adapter should not be mounted vertically straight down. See Wireless
THUM Adapter Reference Manual
Figure 1. THUM Adapter Position
for more information.
Quick Start Guide
.
1.3 Conduit entry
When installing the THUM Adapter into the conduit entry of a wired device, use
an approved thread sealant. Thread sealant provides a water tight seal. The
thread sealant also provides lubrication to ensure easy removal of the THUM
Adapter.
1.4 M20 conduit adapter
When using the M20 Conduit Adapter on the THUM Adapter, use an approved
thread sealant and tighten wrench tight to the THUM Adapter. When installing
the M20 conduit adapter into a conduit, tighten to 32.5 N-m/25 ft-lb to ensure
water tight seal.
Field Communicator connections
In order for the Field Communicator to interface with the THUM Adapter, the
3
Quick Start Guide
wired device must be powered. The Field Communicator must be put into poll
mode and should use the THUM Adapter address of 63.
1.5 Power supply
Minimum loop load of 250 Ohms.
The THUM Adapter communicates via and derives power from a standard
4–20 mA/HART® loop. The THUM Adapter causes a small voltage drop on
the loop which is linear from 2.25 V at 3.5 mA to 1.2 V at 25 mA. Under fault
conditions, the maximum voltage drop is 2.5 V. The THUM Adapter will not
affect the 4–20 mA signal under normal or fault conditions as long as the
loop has at least a 2.5 V margin at the maximum loop current (25 mA for a
typical 4–20 mA/HART device).
Limit the power supply to 0.5 Amps maximum and voltage to 55 Vdc.
Loop current THUM Adapter voltage drop
3.5 mA 2.25 V
25 mA 1.2 V
1.6 Load resistor
If required, add a load resistor as shown in Figure 8 on page 10, Figure 12 on
page 13, and Figure 16 on page 15. The resistor should be adequately rated for
the application (1W minimum) and be compatible with the supplied splice
connector which accepts wire sizes from 14 to 22 AWG.
June 2017
1.7 Loop
To ensure proper operation, the THUM Adapter should not be installed on a
HART loop with other active HART masters. HART masters that are active
periodically, such as a field communicator can be used on a loop with a THUM
Adapter.
4
June 2017
A
Green
Red
Black
White
Yellow
B
C
D
+
-
Green
Red
Black
White
Yellow
A
B
C
+
-
D
2.0 Bench top configuration
When performing bench top configuration it is suggested that you connect the
THUM Adapter to a wired device. If this is not possible, the following wiring
diagrams can be used. For bench top configuration, ensure the power supply
used is limited to 0.5 Amps maximum.
Figure 2. THUM Adapter Only, Powered by a Current Source
A. THUM Adapter C. 20 mA current source
B. Ground D. HART Modem
Quick Start Guide
Figure 3. THUM Adapter Only, Powered by a 24 V Power Supply with 1200
Ohm Resistor to Limit Current to 20 mA
A. THUM Adapter C. 20 V power supply
B. Ground D. HART Modem
5
Quick Start Guide
3.0 Physical installation
The THUM Adapter can be installed in one of two configurations:
1. Direct mount: The THUM Adapter is connected directly to the conduit entry
of the wired device.
2. Remote mount: The THUM Adapter is mounted separate from the wired
device housing and then connected to the wired device using conduit or
other suitable means.
Figure 4. Direct Mount
4.0 Direct mount
1. Install the HART device according to standard installation practices and the
manufacturer’s instructions, being sure to use an approved thread sealant on
all connections.
2. Attach the THUM Adapter to the wired device as shown in Figure 4 on page 6.
3. Connect the THUM Adapter to the HART wired device using the wiring
diagrams (see Figure 21 on page 19, Figure 8 on page 10, Figure 10 on
page 11, and Figure 12 on page 13).
4. Close the housing cover on the HART wired device, so that metal touches
metal, but do not over tighten to prevent damaging the unit.
June 2017
Note
Two splice connectors are included with the THUM Adapter. The first is a two connection
splice. The second is a three connection splice for use with a resistor, if there is not enough
resistance in the loop. Both of these splice connectors can accept 14 to 22 gauge wire. See
wired device reference manual for information on the required loop resistance.
6
June 2017
5.0 Remote mount
Figure 5. Remote Mount
1. Install the HART device according to standard installation practices and the
manufacturer’s instructions, being sure to use an approved thread sealant on
all connections.
2. The THUM Adapter should be mounted as shown in Figure 5 on page 7.
3. Ground the Remote Mount Kit per local practices.
4. Connect the THUM Adapter to the wired device using standard practices.
Wire running from the THUM Adapter to the wired device should be shielded
or in conduit when installed in electrically noisy environments.
5. Connect the THUM Adapter to the HART wired device using the wiring
diagrams (see Figure 21 on page 19, Figure 8 on page 10, Figure 10 on
page 11, and Figure 12 on page 13).
6. Close the housing cover on the HART wired device, so that metal touches
metal, but do not over tighten to prevent damaging the unit.
Quick Start Guide
Note
Two splice connectors are included with the THUM Adapter. The first is a two connection
splice. The second is a three connection splice for use with a resistor, if there is not enough
resistance in the loop. Both of these splice connectors can accept 14 to 22 gauge wire. See
wired device reference manual for information on the required loop resistance.
7
Quick Start Guide
5.1 Wiring diagrams
The following is a list of the figure titles and page numbers for each direct mount
and remote mount wiring diagram:
Figure 6 - “Direct Mount Wiring Diagram for 2-Wire Device” on page 9
Figure 7 - “Remote Mount Wiring Diagram for 2-Wire Device” on page 10
Figure 8 - “Direct Mount Wiring Diagram for 2-Wire Device with Resistor” on
page 10
Figure 9 - “Remote Mount Wiring Diagram for 2-Wire Device with Resistor” on
page 11
Figure 10 - “Direct Mount Wiring Diagram for 4-Wire Passive Device” on page 11
Figure 11 - “Remote Mount Wiring Diagram for 4-Wire Passive Device” on
page 12
Figure 12 - “Direct Mount Wiring Diagram for 4-Wire Passive Device with
Resistor” on page 13
Figure 13 - “Remote Mount Wiring Diagram for 4-Wire Passive Device with
Resistor” on page 13
Figure 14 - “Direct Mount Wiring Diagram for 4-Wire Active Device” on page 14
Figure 15 - “Remote Mount Wiring Diagram for 4-Wire Active Device” on
page 15
Figure 16 - “Direct Mount Wiring Diagram for 4-Wire Active Device with
Resistor” on page 15
Figure 17 - “Remote Mount Wiring Diagram for 4-Wire Active Device with
Resistor” on page 16
Figure 18 - “Direct Mount Wiring Diagram for 4-Wire Active Device with No
4–20 mA Loop” on page 17
Figure 19 - “Remote Mount Wiring Diagram for 4-Wire Active Device with No
4–20 mA Loop” on page 18
Figure 20 - “THUM Adapter only, Powered by a 24 V Power Supply with 1200
Ohm resistor to limit current to 20 mA” on page 18
Figure 21 - “THUM Adapter only, Powered by a 24 V Power Supply with 1200
Ohm resistor to limit current to 20 mA” on page 19
June 2017
8
June 2017
A
Green
Red
Black
White
Yellow
4 -20 mA Loop +
4 -20 mA Loop -
B
C
D
E
F
- PWR/COMM
+ PWR/COMM
Quick Start Guide
Figure 6. Direct Mount Wiring Diagram for 2-Wire Device
A. THUM Adapter D. Splice connector
B. Wired device E. Load resistor ≥ 250 Ω
C. Ground F. Power supply
Note
In order for the THUM Adapter to function properly there must be at least 250 Ohms
resistance in the loop. If the 4–20 mA loop does not have the required resistance, wire a
resistor as shown in Figure 8 on page 10, Figure 12 on page 13, or Figure 16 on page 15 as
applicable.
9
Quick Start Guide
A
B
Green
C
Red
Black
White
Yellow
D
+ COMM
- COMM
To Wired Device
4 -20 mA Loop +
4 -20 mA Loop -
E
F
Figure 7. Remote Mount Wiring Diagram for 2-Wire Device
A. THUM Adapter D. Shield wire
B. Remote mount housing E. Load resistor ≥ 250 Ω
C. Ground F. Power supply
June 2017
Figure 8. Direct Mount Wiring Diagram for 2-Wire Device with Resistor
A
Green
Red
Black
A. THUM Adapter D. Splice connector
B. Wired device E. Load resistor ≥ 250 Ω
C. Ground F. Power supply
White
Yellow
10
B
C
- PWR/COMM
+ PWR/COMM
4 -20 mA Loop +
4 -20 mA Loop -
E
D
F
June 2017
A
B
C
Green
White
Yellow
Red
Black
D
E
+ COMM
- COMM
To Wired Device
4 - 20 mA Loop +
4 - 20 mA Loop -
+
-
F
A
Green
Red
Black
White
Yellow
B
C
COMM +
COMM -
Power -
Power +
D
E
4 - 20 mA Loop +
4 -20 mA Loop -
F
Quick Start Guide
Figure 9. Remote Mount Wiring Diagram for 2-Wire Device with Resistor
A. THUM Adapter D. Shield wire
B. Remote mount housing E. Load resistor ≥ 250 Ω
C. Ground F. Power supply
Figure 10. Direct Mount Wiring Diagram for 4-Wire Passive Device
A. THUM Adapter D. Splice connector
B. Wired device E. Load resistor ≥ 250 Ω
C. Ground F. Power supply
11
Loading...