Micro Motion CDM100P - Page 11

• Explosion-proof/flameproof meters:
- 24 VDC, 0.65 W typical, 1.1 W maximum
- Minimum recommended voltage: 21.6 VDC with 1000 ft of 24 AWG (300 m of
0.20 mm
2
) power-supply cable
- At startup, power source must provide a minimum of 0.5 A of short-term current
at a minimum of 19.6 V at the power-input terminals.
• Intrinsically safe meters:
- 24 VDC, 0.7 W typical with 250 Ω barrier, 0.96 W maximum with 250 Ω barrier
- Minimum recommended voltage: 22.8 VDC with 1000 ft of 22 AWG (300 m of
0.25 mm
2
) power-supply cable
Power cable recommendations for explosion-proof/flameproof meters
Minimum wire gauge (AWG per feet )Figure 1-9:
300ft 600ft 900ft 1200ft 1500ft 1800ft 2100ft 2400ft 2700ft 3000ft
Distance of installation
2 1 . 6V
24 V
14
15
16
17
18
19
20
21
22
23
24
25
26
AWG Maximum
91.44m 182.88m 274.32m 365.76m 457.2m 548.64m 640.08m 731.52m 822.96m 914.4m
Planning
Installation Manual 7