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SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL) User Manual

This document describes the SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL) in terms of their installation, electrical connections, commissioning, maintenance, and troubleshooting.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Connecting RS485 Communications Cables

Connecting RS485 Communications Cables

Note

An RS485 communications cable can be connected in two ways:
  • Terminal block connection

    You are recommended to use a DJYP2VP2-22 2x2x1 network cable or a communications cable with a conductor cross-sectional area of 1 mm2 and cable outer diameter of 14–18 mm.

  • RJ45 network port connection

    You are recommended to use a shielded RJ45 connector and a CAT 5E outdoor shielded network cable with an outer diameter less than 9 mm and internal resistance not greater than 1.5 ohms/10 m.

    NOTE:
    Select either connection mode during installation. Connecting to a terminal block is recommended.

When laying out communications cables, separate them from power cables and keep them away from strong signal sources to avoid communication interference.

Terminal Block Functions

Figure 5-26 shows an RS485 terminal block.
Figure 5-26  Terminal block
Table 5-5 describes functions of the RS485 terminal block.
Table 5-5  Functions of the RS485 terminal block

No.

Port Definition

Description

1

RS485A IN

RS485A, RS485 differential signal +

2

RS485A OUT

RS485A, RS485 differential signal +

3

RS485B IN

RS485B, RS485 differential signal –

4

RS485B OUT

RS485B, RS485 differential signal –

Connecting Cables to the Terminal Block

  1. Remove an appropriate length of the jacket and core wire insulation layer from the communications cable using a wire stripper.

    Figure 5-27  Stripping an RS485 communications cable

  2. Remove the locking caps from the COM1 and COM2 waterproof cable connectors at the SUN2000 bottom and remove the plugs from the locking caps.
  3. Route the communications cable through the locking caps, and then the COM1 (RS485 IN) and COM2 (RS485 OUT) connectors at the SUN2000 bottom.
  4. Remove the terminal base from the terminal block.
  5. Connect communications cables to the terminal base.

    Figure 5-28  Connecting cables to a terminal base

    (1) RS485A IN

    (2) RS485A OUT

    (3) RS485B IN

    (4) RS485B OUT

  6. Install the terminal base on the terminal block, and connect the shield layers to the ground point.

    NOTE:

    When connecting the shielded cables, choose whether to crimp the OT terminal based on site requirements.

    Figure 5-29  Connecting communications cables

  7. Bind communications cables after connecting them.

    Figure 5-30  Binding communications cables

  8. Use a torque wrench with an open end of 33 mm to tighten the locking cap to a torque of 7.5 N•m.

RJ45 Connector Pin Definitions

Figure 5-31 shows an RJ45 connector.
Figure 5-31  RJ45 connector
Table 5-6 lists the RJ45 connector pin definitions.
Table 5-6  RJ45 connector pin definitions

Pin

Color

Pin Definition

1

White-and-orange

RS485A, RS485 differential signal +

2

Orange

RS485B, RS485 differential signal –

3

White-and-green

N/A

4

Blue

RS485A, RS485 differential signal +

5

White and blue

RS485B, RS485 differential signal –

6

Green

N/A

7

White-and-brown

N/A

8

Brown

N/A

Connecting a Cable to the RJ45 Network Port

  1. Insert the wires of the network cable to the RJ45 connector in sequence, as shown in Figure 5-32.

    Figure 5-32  Connecting wires to an RJ45 connector

    (1) White-and-orange

    (2) Orange

    (3) White-and-green

    (4) Blue

    (5) White-and-blue

    (6) Green

    (7) White-and-brown

    (8) Brown

  2. Crimp the RJ45 connector using a crimping tool.
  3. Remove the locking cap from the COM1 waterproof cable connector at the SUN2000 bottom and remove the plug from the locking cap.
  4. Route the cables through the locking caps and then the COM1 port at the SUN2000 bottom.
  5. Insert the RJ45 connector into the RJ45 network port in the SUN2000 maintenance compartment.

    Figure 5-33  Connecting communications cables

  6. Bind communications cables after connecting them.

    Figure 5-34  Binding communications cables

  7. Use a torque wrench with an open end of 33 mm to tighten the locking cap to a torque of 7.5 N•m.

Follow-up Procedure

Check that the cables are connected correctly and securely. Then seal the connectors.

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Updated: 2019-08-02

Document ID: EDOC1100019925

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