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4.5.2 Encoder inputs
The encoder inputs are available on pins
Two incremental encoders may be connected to NextMove ES, each with complementary A, B and Z channel inputs. Each input channel uses a MAX3095 differential line receiver with pull up resistors and terminators. Encoders must provide RS422 differential signals. The use of individually shielded twisted pair cable is recommended. See section 8.1.10 for details of the encoder power supply.
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FlexDriveII |
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Flex+DriveII |
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MintDriveII |
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encoder output |
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CHA+ | 1 | b7 | CHA+ |
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| 120R | MAX3095 |
CHA- | 6 | b10 CHA- |
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CHB+ | 2 | a7 | CHB+ |
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| 120R | MAX3095 |
CHB- | 7 | c10 | CHB- |
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CHZ+ | 3 | b8 | CHZ+ |
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| 120R | MAX3095 |
CHZ- | 8 | b9 | CHZ- |
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| a11 | DGND | Connect internal shield to DGND. | |
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Figure 14 - Encoder input 0 - typical connection from a drive amplifier
(e.g. Baldor MicroFlex, FlexDriveII, Flex+DriveII or MintDriveII)
4.5.2.1Encoder 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 5MHz. However, the effect of cable length is shown in Table 2:
| MN1928 |
