Bracket Mounting; Optional Mounting Bracket; Conduit Entry Plugs And Adapters; Wiring Connections And Power Up - Honeywell STT850 Quick Start Manual

Figure 4 - Pipe Mount with adapter housing - Horizontal & Vertical

Bracket Mounting

If you are using an optional bracket, start with Step 1.
1. Align the two mounting holes in the transmitter with the two slots
in the mounting bracket and assemble the (2) M8 hex cap
screws, (2) lockwashers and (2) flat washers provided. Rotate
transmitter assembly to the desired position and torque the M8
hex cap screws to 27,0 Nm/20,0 Lb-ft maximum.
2. Pipe Mount Option: Refer to
inch (50.8 mm) horizontal or vertical pipe, and install a "U" bolt
around the pipe and through the holes in the bracket. Secure the
bracket with the nuts, flat washers and lock washers provided.
Wall Mount Option: Position the bracket on the mounting surface
3.
at the desired location and secure the bracket to the mounting
surface using the appropriate hardware (Wall mounting hardware
requirements to be determined and supplied by the end user).
Existing mounting bracket, see

Conduit Entry Plugs and Adapters

Procedures
It is the User/Installer's responsibility to install the Transmitters in accordance
with national and local code requirements. Conduit entry plugs and adapters
shall be suitable for the environment, shall be certified for the hazardous
location when required and acceptable to the authority having jurisdiction for
the plant.
CONDUIT ENTRY PRECAUTIONARY NOTICE
THE CONDUIT/CABLE GLAND ENTRIES OF THIS PRODUCT ARE
SUPPLIED WITH PLASTIC DUST CAPS WHICH ARE NOT TO BE USED IN
SERVICE.
IT IS THE USER'S RESPONSIBILITY TO REPLACE THE DUST CAPS
WITH CABLE GLANDS, ADAPTORS AND/OR BLANKING PLUGS WHICH
ARE SUITABLE FOR THE ENVIRONMENT INTO WHICH THIS PRODUCT
WILL BE INSTALLED. THIS INCLUDES ENSURING COMPLIANCE WITH
HAZARDOUS LOCATION REQUIREMENTS AND REQUIREMENTS OF
OTHER GOVERNING AUTHORITIES AS APPLICABLE
Figure 6: Electronic Housing Conduit Entries
Note. No plugs come installed in the housings. All housings come with
temporary plastic dust protectors (red) installed and are not certified for use
in any installation.
Figure 5. Position the bracket on a 2-
Figure 5
.
STT850/750 Quick Start Guide

Optional Mounting Bracket

Position bracket on 2-inch (50.8 mm) and install "U" bolt around pipe and through holes
in bracket. Secure with nuts and lock washers provided. Optional mounting bracket, see
Figure 5
HORIZONTAL FLAT PIPE
HORIZONTAL ANGLE PIPE
Figure 5: Flat and Angle Mounting Brackets secured to Horizontal or Vertical Pipe

Wiring Connections and Power Up

Summary
The transmitter is designed to operate in a two-wire power/current loop with
loop resistance and power supply voltage within the HART and DE
operating ranges shown in Figure 7.
Figure 7: HART* and DE Transmitter Operating Ranges
*Only HART available for STT750 transmitter
For DE operation, add 3.0V to these values.
Loop wiring is connected to the Transmitter by simply attaching the positive
(+) and negative (–) loop wires to the positive (+) and negative (–) terminals
on the transmitter terminal block in the Electronics Housing, shown in
Figure 8.
Connect the Loop Power wiring shield to earth ground only at the power
supply end.
Note that the Transmitter is not polarity-sensitive.
VERTICAL FLAT PIPE
VERTICAL ANGLE PIPE
2