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Input / Output 4-15MN1941

4.4 Other I/O

4.4.1 Encoder inputs 0-2

Location X5, X6, X7

Mating connectors: 9-pin male D-type

Pin Name Description

1 CHA+ Channel A signal

2 CHB+ Channel B signal

3 CHZ+ Index channel signal

4 Shield Shield connection

5 DGND Digital ground

6 CHA- Channel A signal complement

7 CHB- Channel B signal complement

8 CHZ- Index channel signal complement

9 +5V out Power supply to encoder

Three incremental encoders may be connected to NextMove e100, each with complementary A,

B and Z channel inputs. Each input channel uses a MAX3095 dif ferential line receiver with pull up

resistors and terminators. Encoders must provide RS422 differential signals. The use of

individually shielded twisted pair cable is recommended. A 5 V supply is provided on connectors

X5, X6 and X7 for powering the encoders. On models NXE100-16xxS, the same 5 V supply is

also present on connectors X2 and X3 for powering external circuits (see section 4.3.4). Ensure

that the total combined current demand of all 5 V outputs does not exceed 600 mA. If the total

current exceeds 1 A a self-resetting fuse will operate, which may take a few minutes to reset.

4.4.1.1 Encoder input frequency

The maximum encoder input frequency is affected by the length of the encoder cables.

The theoretical maximum frequency is 20 million quadrature counts per second. This is

equivalent to a maximum frequency for the A and B signals of 5 MHz. However, the effect of

cable length is shown in Table 1:

A and B signal

Maximum cable length

frequency

meters feet

1.3 MHz 2 6.56

500 kHz 10 32.8

250 kHz 20 65.6

100 kHz 50 164.0

50 kHz 100 328.1

20 kHz 300 984.2

10 kHz 700 2296.6

7kHz 1000 3280.8

Table 1 - Effect of cable length on maximum encoder frequency

The maximum recommended cable length is 30.5 m (100 ft).

5 1

9 6

Enc 0 Enc 1 Enc 3

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 113 114

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Lg LS-C186TLW3 Manuel de l'utilisateur (24 pages)

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Table des matières

Conditioner

CONTENTS

Precautions

Cleaning

Operating

Operation

Operation(Optional)

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Operation(Heat

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