Analog Grounding Consideration

Analog Grounding Consideration

Overview For the Analog Input Modules (seeQuantum using EcoStruxure™ Control Expert, Discrete and Analog I/O, Reference Manual), the earthing must be done by the analog wires. Analog wires must be grounded directly when entering the cabinet. You may use an analog cable grounding rail. This section describes this approach.

Principle High frequency interference can only be discharged via large surfaces and short cable lengths.

Guidelines

Follow these wiring guidelines:  Use shielded, twisted-pair cabling.  Expose 2.5cm (1inch) as shown:.

 Make sure the wire is properly grounded (connection between the grounding bar and the clamps).

NOTE: It is strongly recommended to use the STBXSP3000 grounding kit and, either the STBXSP3010 or the STBXSP3020 clamp kits.

Assembly of the STBXSP3000 Kit The followed kit is used to have a high quality of the analog signal. The following table describes the STBXSP3000 grounding kit.

Elements Description

Side Supports and grounding bar The following illustration describes the assembly of the side supports and the grounding bar.

The following table describes the step to assemble the STBXSP3000 grounding kit:

Step Description

1 Push the side supports against the walls and tighten the screws.

2 Choose the length of the grounding bar.

Step Description

3 Insert the functional grounding terminal block and tighten the screw

4 Fix the grounding bar at the side supports.

5 The following figure describes the final assembly of the STB XSP 3000.

STBXSP3010 Kit and STBXSP3020 The following table describes the different cable sections (in AWG and mm2):

Final Assembly The following figure shows the final assembly:

Reference AWG mm2

STB XSP 3010 16 to 9 1.5 to 6.5

STB XSP 3020 10 to 7 5 to 11