Installation; Transmitter Locations; Wiring; Analog 4-20 Ma Operation - SMC Networks IT Series Instruction Manual

Identify all components during unpacking and install using the factory configuration.

3.1 TRANSMITTER LOCATIONS

Select locations for each transmitter so that they are placed in areas accessible for calibration.

3.2 WIRING

3.2.1 ANALOG 4-20 mA OPERATION

The 4-20 mA output for the 5100-99-IT can be either 3-wire or 4-wire operation. If using 3-wire operation,
use a minimum of 18 AWG, shielded, 3-conductor cable up to 2000'. For 4-wire operation, use a minimum
of 2 each, 18 AWG, twisted, shielded, pair up to 2000'.

3.2.2 MODBUS OPERATION USING RS-485 CONNECTION

Use a minimum of 18 AWG, 2 conductor for DC power connection. No shield required. In addition use a
minimum of 24 AWG, low capacitance, shielded data cable for RS-485 half duplex communication. The
installation may be planned in a manner which provides up to 32 sensor modules on a single home run.
Refer to Figure 3-3. Units ship with BIAS jumpers connected. For all installations, except very long cable
runs, leave these jumpers connected. The TERM jumpers should be installed in the last (furthest) module
of every loop.

3.2.3 SENTRY OPERATION USING SMC SENTRY CONNECTION

Wire shall be rated as 600 volt tray cable, such as Belden (or equivalent) 27331 or 27331 AS (shielded). If
high RFI or EMI levels exist wiring should be protected by conduit or shield. The installation may be
planned in a manner which provides up to 4 sensor modules on a single home run to a Sentry controller.
Be sure to follow all local electric code and safety requirements when installing the 5100-99-IT

3.2.4 GENERAL

Install conduit as required by local code or construction specifications. When transmitters are to be
multiplexed for Sentry or RS-485 communication, two alternatives may be planned:
•
Use multi-position positive contact terminals to connect daisy chain wiring and provide a pigtail to
connect to the transmitter board.
The drain wire of shielded cable must NOT be used as one of the conductors.
Installation and wiring must be in accordance with the National Electrical Code. Temperature
rating of cable wire must be at least 75

3.3 ENCLOSURE INSTALLATION

To protect the transmitter they should be removed from the enclosure and preserved until final installation and
wiring termination.
Prior to installation and wiring:
1. Remove the transmitter from the module housing by:
•
Unscrew the two captive panel screws in the face plate.
•
Lift the transmitter out of the housing.
2. Install the module housing onto the end of the supply conduit and/or bolt into position as required.
When housing earth grounding is required for the installation a grounding lug is located in the

3. INSTALLATION

All transmitters are factory are pre-configured and calibrated.
environments, it must be specified for that environment.
base of the enclosure. Install the earth ground wire under the green lug.
Model 5100-99-IT 4-20 mA Transmitter
NOTE
NOTE
Transmitter
NOTES
o
C. If cable runs through higher temperature
NOTES
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