Installation manual

14
Reference Manual
00809-0100-4075, Rev CA
Section 3: Mounting
March 2014
Mounting
3.2 Mounting
The THUM can be installed in one of two configurations:
 Direct Mount
 Remote Mount
Direct Mount: The THUM Adapter is connected directly to the conduit entry of the wired device.
Figure 3-1. Direct Mount
3.2.1 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 Figure 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.