Endress+Hauser Proline Promag 10D, Техническая информация, Страница: 7 / 28


Proline Promag 10D
Hauser 7
Special cases
Cable entries Power supply and signal cables (inputs/outputs):
• Cable entry M20 × 1.5 (8 to 12 mm / 0.31 to 0.47")
• Thread for cable entries, ½" NPT, G ½"
Connecting cable for remote version:
• Cable entry M20 × 1.5 (8 to 12 mm / 0.31 to 0.47")
• Thread for cable entries, ½" NPT, G ½"
Cable specification

remote version
Coil cable
• 2 × 0.75 mm
2
(18 AWG) PVC cable with common, braided copper shield (
 
7 mm / 0.28")
• Conductor resistance:

37

/km (

0.011

/ft)
• Capacitance core/core, shield grounded:

120 pF/m (

37 pF/ft)
• Operating temperature: –20 to +80 °C (–4 to +176 °F)
• Cable cross-section: max. 2.5 mm
2
(16 AWG)
• Test voltage for cable insulation:

1433 V AC r.m.s. 50/60 Hz or

2026 V DC
Signal cable
• 3 × 0.38 mm
2
(20 AWG) PVC cable with common, braided copper shield (
 
7 mm / 0.28") and individual
shielded cores
• Conductor resistance:

50

/km (

0.015

/ft)
• Capacitance core/shield:

420 pF/m (

128 pF/ft)
• Operating temperature: –20 to +80 °C (–4 to +176 °F)
• Cable cross-section: max. 2.5 mm
2
(16 AWG)
Operating conditions Potential equalization
When using the measuring device in a:
• Metal pipe that is not grounded
This connection method also applies in situations where:
• Customary potential equalization cannot be ensured
• Excessively high equalizing currents can be expected
Potential equalization takes place via the ground terminal of the
transmitter and the two pipe flanges.
Here, the ground cable (copper wire, 6 mm
2
/ 10 AWG) is
mounted directly on the conductive flange coating with flange
screws.
A0010703
Via the ground terminal of the transmitter and the
flanges of the pipe (ground cable: copper wire at
least 6 mm
2
/ 10 AWG)
When using the measuring device in a:
• Pipe with a cathodic protection unit
The device is installed potential-free in the pipe.
Only the two flanges of the pipe are connected with a ground
cable (copper wire, 6 mm
2
/ 10 AWG). Here, the ground cable
is mounted directly on the conductive flange coating with flange
screws.
Note the following when installing:
• The applicable regulations regarding potential-free installation
must be observed.
• There should be no electrically conductive connection
between the pipe and the device.
• The mounting material must withstand the applicable
torques.
A0010704
Potential equalization and cathodic protection
(ground cable: copper wire at least 6 mm
2
/
10 AWG)
1 Power supply isolation transformer
2 Electrically isolated
1
2 2