Rockwell-automation 1747-DSN DISTRIBUTED I/O SCANNER Bedienungsanleitung PDF herunterladen (Seite 17)

Chapter 2

Wiring and Installation

2–5

The Isolated Coupler is attached to the DH–485 Data Link using its 6

position DH–485 Data Link connector. The I/O blocks are attached to the

DIO Link using 4 of the 6 terminals on the DIO connector.

The DH–485 Data Link cable shield must be earth grounded at one point on

the link.

The SLC processor is connected to the Isolated Coupler with a Catalog

Number 1747–C11 Communication Cable, which is included with the

Isolated Coupler. The programming device is connected to the I/O block (or

Isolated Coupler) using a Catalog Number 1747–C10 Communication Cable.

A2 1 SHD

A2 COMB1SHD

DH–485

Common

DH–485 B

DH–485 A

DIO / DH–485

shield

SLC CPU

Isolated Link

Coupler

SLC

Processor

Termination

DH–485 A

Common

Shield (drain wire)

Chassis Ground

DH–485 B

TERM

COMMON

SHLD

CHS GND

Chassis Grounding

Method 2

The wiring scheme shown is that of a 1747–AIC Series B Link Coupler. Although the Series A Link Coupler is

labeled differently, you do not have to rewire your connector.

Because the DIO/DH–485 shields are tied together at each block, you should only connect the shields to

chassis ground in one place. If you choose to ground the shields using Chassis Grounding Method 2, do not

use Chassis Grounding Method 1 (shown on page 2–3).

TERM and A must be jumpered (to terminate the link) if the Isolated Coupler is at the end of the DH–485 Link.

1747–C11

Communication

Cable

DIO Connector

for the I/O

block

COM

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 39 40

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