Wiring of the PROFIBUS DP Network

Overview

The recommended way to connect an LTMR controller to a PROFIBUS DP network on the RS 485 bus is the connection via the socket shielded SUB-D 9 connector.

This section describes the connection of LTMR controllers installed in withdrawable drawers.

Precautions

Always follow the recommendations for wiring and connecting.

WARNING

UNINTENDED EQUIPMENT OPERATION This equipment must be installed, programmed, and serviced only by qualified personnel. Follow all up-to-date instructions, standards and regulations. Check the function settings before starting the motor. Do not downgrade or modify these devices. Incorrect configuration can result in unpredictable behavior of the devices. Failure to follow these instructions can result in death, serious injury, or equipment damage.

PROFIBUS DP Wiring Rules

The following wiring rules must be respected in order to reduce EMC disturbance on the behavior of the LTMR controller:

• Keep a distance as large as possible between the communication cable and the power or control cables (minimum 30 cm or 11.8 in.).

• Cross the PROFIBUS DP cable and the power cables at right angles, if necessary.

• Install the communication cables as close as possible to the grounded plate.

• Do not bend or damage the cables. The minimum bending radius is 10 times the cable diameter.

• Avoid sharp angles of paths or passage of the cable.

• Use the recommended cables only.

• A PROFIBUS DP cable must be shielded:

  • The cable shield must be connected to a protective ground.

  • The connection of the cable shield to the protective ground must be as short as possible.

  • Connect together all the shields, if necessary.

  • Use a collar to ground the shield.

• When the LTMR controller is installed in a withdrawable drawer:

  • Connect together all the shield contacts of the withdrawable drawer part of the auxiliary connector to the ground of the withdrawable drawer to create an electromagnetic barrier. Refer to the Okken Communications Cabling & Wiring Guide (available on request).

  • Do not connect the cable shield at the fixed part of the auxiliary connector.

• Place an active termination at each end of the bus to avoid malfunctions on the communication bus.

• Wire the bus between each connector directly, without intermediate terminal blocks.

• The common polarity (0 V) must be connected directly to protective ground, preferably at one point only for the entire bus. In general, this point is chosen either on the primary device or on the polarization device.

For more information, refer to the chapter titled “EMC Guidelines” in Electrical Installation Guide , document number EIGED306001EN (available in English only).

LTMR Controllers Installed in a Blokset or Okken Motor Control Switchboard

The installation of LTMR controllers in withdrawable drawers of a switchboard presents constraints specific to the type of switchboard:

• For installation of LTMR controllers in an Okken switchboard, refer to the Okken Communications Cabling & Wiring Guide (available on request).

• For installation of LTMR controllers in a Blokset switchboard, refer to the Blokset Communications Cabling & Wiring Guide (available on request).

• For installation of LTMR controllers in other types of switchboard, follow the EMC instructions described in this guide and also refer to the instructions specific to your type of switchboard.

LTMR Controllers Installed in Withdrawable Drawers

The wiring diagram for connection of LTMR controllers installed in withdrawable drawers to the RS 485 bus via the SUB-D 9 connector and hardwired cables is as follows:

1 Primary (PLC, PC, or communication module) with line terminator

2 PROFIBUS DP shielded cable TSX PBS CA •00

3 SUB-D 9 plug connector 490 NAD 911 0•

4 Grounding of the PROFIBUS DP cable shield

5 Withdrawable drawer

6 Withdrawable drawer part of the auxiliary connector

7 Fixed part of the auxiliary connector

8 Line terminator VW3 A8 306 DR (120 Ω)

SUB-D 9 Plug Connector

The following figure illustrates the connection of a PROFIBUS DP cable:

SUB-D 9 Connector Wiring

The following table describes the procedure for wiring the SUB-D 9 connector bus interface:

List of PROFIBUS DP Accessories

List of PROFIBUS DP connection accessories:

List of PROFIBUS DP Cables