Wiring Proline Promag 53 MODBUS RS485
46 Endress+Hauser
4.2.2 Cable specifications
Signal cable
• 3 × 0.38 mm² PVC cable with common, braided copper shield (∅ ∼ 7 mm) and individually
shielded cores
• With Empty Pipe Detection (EPD): 4 × 0.38 mm² PVC cable with common, braided copper shield
(∅∼7 mm) and individually shielded cores
• Conductor resistance: ≤ 50 Ω/km
• Capacitance: core/shield: ≤ 420 pF/m
• Operating temperature: –20 to +80 °C
• Conductor cross-section: max. 2.5 mm²
Coil cable
• 2 × 0.75 mm² PVC cable with common, braided copper shield (Ø ∼ 7 mm)
• Conductor resistance: ≤ 37 Ω/km
• Capacitance: core/core, shield grounded: ≤ 120 pF/m
• Operating temperature: –20 to +80 °C
• Conductor cross-section: max. 2.5 mm²
• Test current for cable insulation: ≥1433 V AC rms 50/60 Hz or ≥2026 V DC
A0003194
Fig. 30: Cable cross-section
a Signal cable
b Coil current cable
1 = Core, 2 = Core insulation, 3 = Core shield, 4 = Core jacket, 5 = Core reinforcement, 6 = Cable shield,
7=Outer jacket
Reinforced connecting cables
As an option, Endress+Hauser can also deliver reinforced connecting cables with an additional,
reinforcing metal braid.
We recommend such cables for the following cases:
• Directly buried cable
• Cables endangered by rodents
• Device operation which should comply with the IP 68 (NEMA 6P) standard of protection
Operation in zones of severe electrical interference
The measuring device complies with the general safety requirements in accordance with EN 61010
and the EMC requirements of IEC/EN 61326.
"
Caution!
Grounding is by means of the ground terminals provided for the purpose inside the connection
housing. Keep the stripped and twisted lengths of cable shield to the terminals as short as possible.
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