ADB Safegate CRE 10, Руководство по установке

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A.07.370e - Edition 2.0 49
Pre-installation
5.5.4 Plan the cable slack, big and small cabinet (option CS)
1. Plan the cable slack:
Required cable slack from the bottom to the connection location:
- maximum 500 mm for the input power supply.
- maximum 400 mm for the output power supply.
- maximum 500 mm for the remote control cables.
5.5.5 Power supply cables and earthing cables
1. Make sure that you plan power supply and earthing cables that comply with table 3-B in IEC 6095-1 latest
edition.
5.5.6 Plan cables to the remote control interface
Multiwire cables (option)
1. Plan screened cables with the screen connected to the ground at only one end.
2. Plan the signal wires. See also the remote control scheme in § 7.8.3.
- Plan one paired wire for the signal and the other wire of that pair as a return. Bundle all returns to the
same terminal to minimize the voltage drop.
- Do not combine the remote control and back-indication signals in one cable, except when these
signals do not require more than low-level isolation. The latter is the case if the remote control and
back-indication signals use one common energy source.
3. Calculate the wire sections. Take into account these items:
- The tolerances of the power supply.
- The maximum permitted voltage drop on the line. This is the minimum available power supply voltage
minus the minimum required voltage for the load. The coils of the relays have a resistance of 1700
Ohm.
- The typical resistance.
- The required load current in each line.
- The number of signals that may exist at the same time.
Table: 5.3 Recommended multiwire cables
WARNING
Only earth the remote control cable at one end, preferably at the equipment side.
Type Number of conductors Diameter [mm]
JE-LiYCY with armouring type R, B, Q or Z number of s return(s) 0.5
TWAVB number of s return(s) 0.8