
8Safety Notes and Short Summary – DOP11B Operator Terminals
3 Installation instructions for the basic unit
Installation
3 Installation
3.1 Installation instructions for the basic unit
3.1.1 Separate cable ducts
Route power cables and electronics cables in separate cable ducts.
3.1.2 Cross sections
• Voltage supply: Cross section according to rated input current.
• Electronics cables:
– 1 conductor per terminal 0.20 ... 0.75 mm2(AWG 20 ... 17)
– 2 conductors per terminal 0.20 ... 0.75 mm2(AWG 20 ... 17)
3.1.3 Shielding and grounding
• Use shielded signal cables only.
• Apply the shield by the shortest possible route and make sure it is grounded
over a wide area at both ends. You can ground one end of the shield via a suppres-
sion capacitor (220 nF / 50 V) to avoid ground loops. If using double-shielded cables,
ground the outer shield on the controller end and the inner shield on the other end.
•Shielding can also be achieved by laying the cables in grounded sheet metal
ducts or metal pipes. In this case, the power cables and control cables should
be routed separately.
• The unit is grounded via the connector for 24 V voltage supply.
00755BXX
Figure 1: Example of correct shield connection with metal clamp (shield clamp) or metal
cable gland