• Complies with low voltage directive 2006/95/EC per EN 61010-1 (IEC 61010-1) with
amendment 2, and Installation (Overvoltage) Category II, Pollution Degree 2
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.
• 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 0.5 amps.
Cable sizing formulaFigure 1-9:
• M: minimum supply voltage
• R: cable resistance
• L: cable length
Typical power cable resistance at 68 °F (20 °C)Table 1-6:
Wire gauge Resistance
14 AWG 0.0050 Ω/ft
16 AWG 0.0080 Ω/ft
18 AWG 0.0128 Ω/ft
20 AWG 0.0204 Ω/ft
2.5 mm
2
0.0136 Ω/m
1.5 mm
2
0.0228 Ω/m
1.0 mm
2
0.0340 Ω/m
0.75 mm
2
0.0460 Ω/m
0.50 mm
2
0.0680 Ω/m
1.8 Orientation
You can mount the transmitter in any orientation as long as the conduit openings do not
point upward.
CAUTION!
Upward-facing conduit openings risk condensation moisture entering the transmitter housing,
which could damage the transmitter.
Planning
Installation Manual 9
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