Mounting - Emerson Rosemount 644H Reference Manual

Reference Manual
00809-0100-4728, Rev HA
December 2002

MOUNTING

Figure 2-2. Assembling Rail Clip
Hardware to a Model 644H
Figure 2-3. Assembling Model
644H for Use in an Existing L1
Connection Head
Mount the transmitter at a high point in the conduit run to prevent moisture
from draining into the transmitter housing.
The Model 644H installs
• In a connection head or universal head mounted directly on a sensor
assembly
• Apart from a sensor assembly using a universal head
• To a DIN rail using an optional mounting clip.
The Model 644R mounts directly to a wall or to a DIN rail.
Mounting a Model 644H to a DIN Rail
To attach a head mount transmitter to a DIN rail, assemble the appropriate rail
mounting kit (part number 00644-5301-0010) to the transmitter as shown in
Figure 2-2. Follow the procedure under "Rail Mount Transmitter and Sensor".
G-Rail (asymmetric)

Mounting

Hardware
Transmitter
Rail Clip
Note: Kit includes Mounting Hardware and both types of Rail Kits.
Retrofitting a Model 644H for Use in an Existing Threaded Sensor
Connection Head
To mount a Model 644H in an existing threaded sensor connection head
(former option code L1), order the Model 644H retrofit kit (part number
00644-5321-0010). The retrofit kit includes a new mounting bracket and all
associated hardware necessary to facilitate the installation of the Model 644H
in the existing head. See Figure 2-3.
Existing Threaded Sensor Connection Head
(Former option code L1)
Models 644H and 644R
Top Hat Rail (symmetric)
Mounting
Hardware
Kit includes
replacement bracket
and screws.
Transmitter
Rail Clip
2-3