Emerson Micro Motion 5700 Installation Manual page 9

Installation Manual
MMI-20029969
• 18 to 100 VDC, 6 watts typical, 11 watts maximum
Note
For DC power:
• Power requirements assume a single transmitter per cable.
• At startup, the power source must provide a minimum of 1.5 amps of short-term
current per transmitter and not pull voltage below 18 VDC.
• Length and conductor diameter of the power cable must be sized to provide 18 VDC
minimum at the power terminals, at a load current of 0.7 amps.
Cable sizing formula
M = 18V + (R x L x 0.5A)
• M: minimum supply voltage
• R: cable resistance (in Ω/ft)
• L: cable length (in 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 that are separately
installed is determined by cable type.
Cable type
Micro Motion 4-wire remote
mount
Micro Motion 9-wire remote
mount
Installation Manual
2
2
2
2
2
Wire gauge
Not applicable
Not applicable
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)
Planning
February 2020
9