KROHNE OPTIBAR P 3050 C EN - Manual (Page 19)

ELECTRICAL CONNECTIONS
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OPTIBAR P 3050 C
www.krohne.com 03/2012 - 4001953401 - MA OPTIBAR P3050C R02 en
4.2.1 Requirements for signal cables provided by the customer
Specifications for standard signal cables
• 2 twisted double wire circuits
• 20 AWG twisted, tinned copper conductors
• Completely tinned copper shielding
• Casing colour: grey
• Colour of wires:
Pair 1: black / red; pair 2: green / white
• Test voltage: ≥ 500 VAC RMS (750 VDC)
• Temperature range: -40...+105°C / -40...+221°F
• Capacity: ≤ 200 pF/m / 61 pF/ft
• Inductance: ≤ 0.7 µH/m / 0.2 µH/ft
4.2.2 Laying electrical cables correctly
1 Lay the cable in a loop just before the housing.
2 Tighten the screw connection of the cable entry securely.
3 Never mount the housing with the cable entries facing upwards.
4 Seal cable entries that are not needed with a plug.
INFORMATION!
If the signal cable was not ordered, it is to be provided by the customer. The following
requirements regarding the electrical values of the signal cable must be observed:
Figure 4-1: Protect housing from dust and water
.book Page 19 Thursday, March 8, 2012 9:29 AM