Emerson Micro Motion H Series Installation Manual page 14

Transmitter power and I/O wiring
January 2019
• Twisted pair construction.
• Applicable hazardous area requirements, if the core processor is installed in a
hazardous area.
• Wire gauge appropriate for the cable length between the core processor and the
transmitter, or the host.
Table 3-2: Wire gauge
Wire gauge
VDC 22 AWG (0.326 mm²)
VDC 20 AWG (0.518 mm²)
VDC 18 AWG (0.823 mm²)
RS-485 22 AWG (0.326 mm²) or larger
3.2.2 Prepare a cable with a metal conduit
Procedure
1. Remove the core processor cover using a flat-blade screw driver.
2. Run the conduit to the sensor.
3. Pull the cable through the conduit.
4. Cut the drain wires and let them float at both ends of the conduit.
3.2.3 Prepare a cable with user-supplied cable glands
Procedure
1. Remove the core processor cover using a flat-blade screw driver.
2. Pass the wires through the gland nut and gland body.
3. Terminate the RS-485 shield and drain wires to the housing internal grounding
4. Assemble the gland according to vendor instructions.
3.2.4 Prepare a cable with Micro Motion-supplied cable glands
Procedure
1. Remove the core processor cover using a flat-blade screw driver.
2. Pass the wires through the gland nut and clamping insert.
14
A. Gland body
B. Gland nut
screw.
Maximum cable length
300 ft (91 m)
500 ft (152 m)
1,000 ft (305 m)
1,000 ft (305 m)
Installation Manual
20002346
Micro Motion H-Series