Flowserve MX/QX Profibus DP/PA Field Unit User Manual download pdf (Page 24)

PB DPV1 / PA Field Unit Installation and Maintenance FCD LMENIM2336-03 – 12/12

For cable connecting information on these components, refer to the following:

• Installation Guidelines for PROFIBUS – FMS/DP Version 1.0, PROFIBUS International Order No.

2.112.

• Technical Guideline: PROFIBUS PA User & Installation Guideline, Version 2.2, February 2003.

Figure 2.11 – PROFIBUS DP Segments

2.4 Site and Network Cable Preparation

2.4.1 Site Preparation

Prepare the installation site and associated equipment for operation of the MX/QX PB-controlled

actuators as follows:

1. Prepare a detailed site plan consisting of the following:

• Actuator locations and tag numbers.

• Junction boxes and terminal strip locations and tag numbers.

• Terminators and power supplies/conditioners, and repeaters.

2. Provide free access to the MX/QX control panel and terminal block for setup, conﬁguration, and

troubleshooting.

3. Prepare the cable and label all wires. See Section 2.4.2.

4. Install power and control wires in separate conduits.

5. Install and verify earth grounds. The cable shields should be tied together. Ground the bus shield

at the end of each segment. The MX/QX PB unit should not connect either conductor of the cable

to ground at any point in the network. Refer to Sections 2.2.4.1 and 2.2.5.1.

NOTE: An effective local earth ground is deﬁned as a low impedance (less than 5 ohms) path to

either:

• A ground electrode placed in the close vicinity of the actuator, free of any ground loop currents OR

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Flowserve MX/QX Profibus DP/PA Field Unit User Manual Page 24