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

Figure 3 - Angle Bracket Pipe Mount - Horizontal & Vertical
Figure 4: Pipe Mount - Horizontal & Vertical

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.
- During installation it is mandatory to use the IP66/ TYPE 4X rated glands on both the
sides of conduit openings. The glands shall be properly tightened to avoid any air
passage.
- The End Cap and Front glass Cap of transmitter shall be properly tightened to ensure
no condensation forms inside the unit.

Bracket Mounting

If you are using an optional bracket, start with Step 1.
1.
2.
3.

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
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.
*Only HART available for STT750 transmitter
For DE operation, add 3.0V to the Loadline values of 250 ohms and above.
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
Grounding Details:
Connect the Loop Power wiring shield to earth ground only at the power supply end.
Note: The transmitter is not polarity-sensitive.
STT850/750 Quick Start Guide
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) lock
washers, 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.
Pipe Mount Option: Refer to Figure 5. Position the bracket on a 2-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 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
Figure 5.
HORIZONTAL FLAT PIPE VERTICAL FLAT PIPE
HORIZONTAL ANGLE PIPE VERTICAL ANGLE PIPE
Figure 7: HART* and DE Transmitter Operating Ranges
Figure 8.
2