Operating Manual: PSS SB 3006-3 Series
7-3
• Connecting and laying the cables
- Screened cables are not required for digital I/Os. However, if the
connection cables have screening, it should be connected at one end.
- Minimum range for cable cross sections on field connection terminals in
mm
2
, in accordance with EN 61131-2, 07/00:
¤ Digital inputs: 0.5 (AWG20) ... 1.5 (AWG16)
¤ Test pulse outputs: 0.5 (AWG20) ... 1.5 (AWG16)
¤ Power supply: 1.5 (AWG16) ... 2.5 (AWG12)
¤ Functional earth: 1.5 (AWG16) ... 2.5 (AWG12)
- If you use a multi-strand cable with a cross section of 1.5 mm
2
to
connect the inputs and test pulse outputs, you will need to use ferrules
conforming to DIN 46228, Part 1 and Part 2 0.5 ... 1.5 mm
2
, Form A or
C. To crimp the ferrules you can use crimp pliers (crimp form A or C)
conforming to EN 60947-1, such as the PZ 1.5 or PZ 6.5 from
Weidmüller, for example.
- Use copper wiring.
-The torque setting on the terminals should be 0.5 … 0.6 Nm.
The terms “signal inputs with frequent operation” and “single-channel safe
input devices” are used in the wiring examples. These terms are defined
as follows:
• Signal inputs with frequent operation
These are signals which change status on several occasions within a
period of time.
• Single-channel safe input devices
These are positively-driven, normally-closed contacts which open on
actuation (failsafe principle).
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