Conduit Entry Connectors, Plugs And Adapters; Wiring Connections And Power Up; Table 1: Conduit Entry Connectors And Plugs; Table 2 - Conduit Adapters - Honeywell SMV800 Quick Start Installation Manual

Conduit Entry Connectors, 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.
Use the following procedures for installation.

Table 1: Conduit entry connectors and plugs

Step
1 Remove the protective plastic cap from the threaded conduit
entry.
2 To ensure the environmental ingress protection rating on
tapered (NPT), a non-hardening thread sealant may be used.
3 Thread the appropriate size conduit connector or plug (M20
or ½" NPT) into the conduit entry opening. Do not install
conduit entry connectors or plugs in conduit entry openings if
adapters or reducers will be used.
4 Tighten plugs per the following table.
Description
M20 Conduit
10mm Hex Wrench
Entry
½" NPT
10mm Hex Wrench
Conduit Entry

Wiring Connections and Power Up

Summary
The transmitter (HART/DE) is designed to operate in a two-wire power/current
loop with loop resistance and power supply voltage within the HART/DE
operating range shown below.
Figure 7: Two-wire power/current loop
A minimum of 250 ohms of loop resistance is required to support
communications. Loop resistance = barrier resistance., + wire resistance,
=receiver resistance, +peripheral device
resistance
Loop wiring is connected to the transmitter by attaching the positive (+) and
negative (–) loop wires to the positive (+) and negative (–) terminals on the
transmitter terminal block in the electronics housing shown in
Connect the loop power wiring shield to earth ground only at the power supply
end.
Action
Tool Torque
32 Nm 24 Lb-ft
32 Nm 24 Lb-ft
Figure 8.

Table 2 - Conduit Adapters

Step
1 Remove the protective plastic cap from the threaded conduit
entry.
2 To ensure the environmental ingress rating on tapered
threads (NPT), a non-hardening thread sealant may be
used.
3 Thread the appropriate size adapter (M20 or ½ NPT) into
the conduit entry opening
4 Tighten adapters as per the following table.
Description
½ to ¾ NPT
Adapter
Figure 6: Electronic Housing Conduit Entries
Note. No conduit connectors or 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.
Supply Voltage for SMV Modbus
Modbus (RS-485) Models: 9.5 V to 30 Vdc at terminals.
Power Consumption: Average power consumption is 70 mW at 9.5 V
Supply. This includes RS-485 communication at 9600 baud rate at a rate
of once per second without termination at room temperature.
Figure 8: Terminal Block and Grounding Screw location
As shown above, each transmitter has an internal terminal to connect it to
earth ground. Optionally, a ground terminal can be added to the outside of
the Electronics Housing.
Screw terminals 1, 2, 3, 5, 6, 7 & 8 only required for single input, terminals
4 and 9 are only used for a Modbus device
CAUTION: For proper operation of the transmitter,
grounding of the transmitter is mandatory. This minimizes
the possible effects of noise on the output signal and
affords protection against lighting and static discharge
Action
Tool Torque
1 ¼" Wrench
32Nm 24Lb-ft