Emerson MicroMotion HPC010 Installation Manual page 18

Transmitter power and I/O wiring
March 2020
User-supplied cable must meet the following requirements:
• 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.
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
4.2.2 Maximum cable lengths
Table 4-2: Maximum lengths for Micro Motion cable
Cable type
Micro Motion 9-wire
Micro Motion 4-wire
Table 4-3: Maximum lengths for user-supplied 4-wire cable
Wire function
Power (VDC)
Signal (RS-485)
4.2.3 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.
18
Maximum cable length
300 ft (91 m)
500 ft (152 m)
1,000 ft (305 m)
1,000 ft (305 m)
To transmitter
All other MVD transmitters
All 4-wire MVD transmitters
Wire size
22 AWG (0.326 mm²)
20 AWG (0.518 mm²)
18 AWG (0.823 mm²)
22 AWG (0.326 mm²) or larger
Installation Manual
MMI- 20032352
Maximum length
60 ft (18 m)
• 1,000 ft (305 m) without
Ex-approval
• 500 ft (152 m) with IIC
rated sensors
• 1,000 ft (305 m) with IIB
rated sensors
Maximum length
300 ft (91 m)
500 ft (152 m)
1,000 ft (305 m)
1,000 ft (305 m)
Micro Motion HPC