Emerson Rosemount Smart Wireless THUM, Reference Manual

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Reference Manual
00809-0100-4075, Rev BA
October 2010
Smart Wireless THUM Adapter
3-2
MOUNTING
The THUM 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 3-1. Direct Mount
Direct Mount
1. Install the HART
®
device according to standard installation practices,
being sure to use an approved thread sealant on all connections.
2. Attach the THUM Adapter to the wired device as shown in Figure 3-1.
When installing the THUM Adapter into the conduit entry of a wired
device, use an approved thread sealant.
3. Connect the THUM Adapter to the HART wired device using the
wiring diagrams below. See Figure 3-19 through 3-26 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.
Remote Mount: The THUM Adapter is mounted separate from the wired
device housing and then connected to the wired device using conduit.
Figure 3-2. Remote Mount