Emerson Micro Motion 5700 Instruction Manual page 10

Planning
April 2022
Cable sizing formula
M = 18V + (R x L x 0.7A)
• M: minimum supply voltage
• R: cable resistance
• L: cable length (in Ω/ft)
Typical power cable resistance at 68 °F (20.0 °C)
Wire gauge
14 AWG
16 AWG
18 AWG
20 AWG
2.5 mm
1.5 mm
1.0 mm
0.75 mm
0.50 mm
2.3.1 Maximum cable lengths between sensor and transmitter
The maximum cable length between the sensor and transmitter, which are installed
separately, is determined by cable type.
Cable type
Micro Motion 4-wire remote
mount
Micro Motion 9-wire remote
mount
User-supplied 4-wire
10
2
2
2
2
2
Wire gauge
Not applicable
Not applicable
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
Micro Motion 5700 Transmitters with Configurable Inputs and Outputs
Resistance
0.0050 Ω/ft
0.0080 Ω/ft
0.0128 Ω/ft
0.0204 Ω/ft
0.0136 Ω/m
0.0228 Ω/m
0.0340 Ω/m
0.0460 Ω/m
0.0680 Ω/m
Maximum length
• 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
60 ft (18 m)
300 ft (91 m)
500 ft (152 m)
1,000 ft (305 m)
1,000 ft (305 m)
Installation Manual
MMI-20027478