Installation
49
300314330_002_C7 - 05/2021 - © Leybold
Control Circuit Wiring
The control terminal board is equipped with screwless terminals. Always use
wires within the specification listed below. For safe wiring it is recommended
to use solid wires or flexible wires with ferrules. The stripping length respec-
tively ferrule length should be 8 mm.
Wire Type
Wire size (mm
2
)
Solid
0.2 to 1.5
Flexible
0.2 to 1.0
Flexible with ferrule
0.25 to 0.5
Control Circuit Wiring Precautions
Consider the following precautions for wiring the control circuits.
■
Separate control circuit wiring from main circuit wiring and other high-pow-
er lines.
■
For external control power supply use a UL Listed Class 2 power supply.
■
Use twisted-pair or shielded twisted-pair cables for control circuits to pre-
vent operating faults.
■
Ground the cable shields with the maximum contact area of the shield and
ground.
■
Cable shields should be grounded on both cable ends.
■
If flexible wires with ferrules are connected they might fit tightly into the ter-
minals. To disconnect them, grasp the wire end with a pair of pliers,
release the terminal using a straight-edge screw driver, turn the wire for
about 45°, and pull it gently out of the terminal.
