Micro Motion Quick Installation Guide: Smart Wireless THUM Adaptor | Micro Motion Manuals & Guides
Quick Installation Guide
Wireless Considerations
Step 1: Physical Installation
Step 2: Verify Operation
Reference Information
Product Certifications
EC Declaration of Conformity
Start
End
00825-0100-4075, Rev AA
August 2009
Smart Wireless THUM Adapter
Smart Wireless THUM™ Adapter
¢00825-0100-4075[¤
Quick Installation Guide
IMPORTANT NOTICE
WARNING
IMPORTANT NOTICE
Emerson Process Management
Rosemount Division
8200 Market Boulevard
Chanhassen, MN USA 55317
T (US) (800) 999-9307
T (Intnl) (952) 906-8888
F (952) 949-7001
Rosemount Temperature GmbH
Frankenstrasse 21
63791 Karlstein
Germany
T 49 (6188) 992 0
F 49 (6188) 992 112
Emerson Process Management
Asia Pacific Private Limited
1 Pandan Crescent
Singapore 128461
T (65) 6777 8211
F (65) 6777 0947 / (65) 6777 0743
Enquiries@AP.EmersonProcess.com
Smart Wireless THUM Adapter
© 2009 Rosemount Inc. All rights reserved. All marks property of owner.
This installation guide provides basic guidelines for the Smart Wireless THUM Adapter. It
does not provide instructions for detailed configuration, diagnostics, maintenance,
service, troubleshooting, or installations. Refer to the THUM Adapter Reference Manual
(document number 00809-0100-4075) for more instruction. The manual and this QIG are
also available electronically on www.rosemount.com.
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. Please
review the Product Certifications section for any restrictions associated with a safe
installation.
• Before connecting a 375 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 complies with Part 15 of the FCC Rules. Operation is subject 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.
This device must be installed to ensure a minimum antenna separation distance of
7.87-in. (20 cm) from all persons.
00825-0100-4075, Rev AA
August 2009
During normal operation, or in fault condition, the THUM Adapter will cause a 2.5 V drop
in the connected 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.
2
Quick Installation Guide
00825-0100-4075, Rev AA
August 2009
Smart Wireless THUM Adapter
WIRELESS CONSIDERATIONS
Power Up Sequence
Power should not be applied to any wireless device until the Smart 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 Smart Wireless
Gateway Manual (Doc. No. 00809-0200-4420).
THUM Adapter Position
If possible, the THUM Adapter should be positioned vertically, either straight up or straight
down, and it 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. See THUM
Adapter reference manual (00809-0100-4075) for more information.
Figure 1. THUM Adapter Position
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
a lubrication to ensure easy removal of the THUM Adapter.
375 Field Communicator Connections
In order for the 375 Field Communicator to interface with the THUM Adapter, the wired
device must be powered. The 375 must be put into poll mode and should use the THUM
Adapter address of 63.
3
Quick Installation Guide
Smart Wireless THUM Adapter
00825-0100-4075, Rev AA
August 2009
Power Supply
Minimum loop load of 250 Ohms.
The THUM Adapter communicates 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).
Loop Current THUM Adapter voltage drop
3.5 mA 2.25 V
25 mA 1.2 V
Load Resistor
If required, add a load resistor as shown in Figure 5, 7, and 9. 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.
4
Quick Installation Guide
STEP 1: PHYSICAL INSTALLATION
00825-0100-4075, Rev AA
August 2009
The THUM Adapter can be installed in one of two configurations:
Direct Mount: The THUM Adapter is connected directly to the conduit entry of the wired
device.
Figure 2. Direct Mount
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 3. Remote Mount
Smart Wireless THUM Adapter
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 2.
3. Connect the THUM Adapter to the HART wired device using the wiring diagrams below.
See Figures 4, 5, 6, and 7 on the following pages.
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.
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.
5
Quick Installation Guide
Splice Connector
Wired Device
4-20 mA Loop -
4-20 mA Loop +
Ground
- PWR / COMM
+ PWR / COMM
THUM Adapter
Green
Red
Black
White
Yellow
Smart Wireless THUM Adapter
00825-0100-4075, Rev AA
August 2009
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 3 on page 5.
3. 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.
4. Connect the THUM Adapter to the HART wired device using the wiring diagrams below.
See Figure 4, 5, 6, and 7 on the following pages.
5. Close the housing cover on the HART wired device, so that metal touches metal, but do
not over tighten to prevent damaging the unit.
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.
Figure 4. Wiring Diagram for 2-Wire Device
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 5, 7, or 9 as applicable.
6
Loading...