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• Verify that the transmitter has the appropriate hazardous area approval. Each
transmitter has a hazardous area approval tag attached to the transmitter housing.
• Ensure that any cable used between the transmitter and the sensor meets the
hazardous area requirements.
1.5 Power requirements
The transmitter must be connected to a DC voltage source.
• Minimum 19.2 to 28.8 VDC
• 6.3 watts
• Meets Installation (Overvoltage) Category II, Pollution Degree 2 requirements
Cable sizing formulaFigure 1-4:
M
= 19.2V + (R × L × 0.33A)
A. M: minimum supply voltage
B. R: cable resistance
C. L: cable length
Typical power cable resistance at 68 °F (20 °C)Table 1-4:
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
Planning
Installation Manual 5