Proline Promag W 800
Endress+Hauser 17
The required ground cable can be ordered from Endress+Hauser ä 53.
Pipe with cathodic protection
This connection method only take place, if both of the following requirements are fulfilled:
• Metal pipe without liner or pipe with electrically conductive liner
• Cathodic protection is integrated in the operator protection
A0016319
Potential equalization and cathodic protection
1 Isolating transformer power supply
2 Electrically isolated to pipe
3 Capacitor
1. Connect the measuring device potential-free compared to protective earth to the power supply.
2. Install the measuring device electrically isolated in the pipe.
3. Connect the two flanges of the pipe with a ground cable.
Ground cable = copper wire, at least 6 mm² (0.0093 in²).
4. By connecting the shielding of the signal cables a capacitor has to be used.
For remote version: The ground terminal in the example refers to the sensor and not to the
transmitter.
The required ground cable can be ordered from Endress+Hauser ä 53.
Terminals Plug-in terminals for core cross-sections 0.5 to 2.5 mm
2
(20 to 14 AWG)
Cable entry Power supply cable, signal cable (inputs/outputs) and connecting cable for remote version
•Cable entry
– Standard: M20 × 1.5 (8 to 12 mm / 0.31 to 0.47 in)
– For reinforced cables: M20 × 1.5 (9.5 to 16 mm / 0.37 to 0.63 in)
• Thread: ½" NPT, G ½"
If using metal cable entries, the optional ground plate for cable entries must be used.
Cable specification • Permitted temperature range: –40 to 80 °C (–40 to 176 °F),
Minimum ambient temperature: + 20 K
• A shielded cable is recommended.
• Stripped length: 6 mm
• Strand (flexible): 2.5 mm²
• Cable diameter
– With cable glands supplied: M20 × 1.5 with cable Ø 6 to 12 mm (0.24 to 0.47 in)
– Plug-in screw terminals: core cross-sections 0.5 to 2.5 mm² (20 to 14 AWG)
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