4.5 Other I/O
4.5.1 Encoder interfaces - X12, X13, X14, X15, X16
51
9 6
Location | Breakout module, connectors X12, X13, X14, X15, X16 | |
|
|
|
Pin | Name | Description |
|
|
|
1 | Encoder V+ | Power supply to encoder |
|
|
|
2 | CHZ+ | Index channel signal |
|
|
|
3 | CHB- | Channel B signal complement |
|
|
|
4 | Shield | Shield connection |
|
|
|
5 | CHA+ | Channel A signal |
|
|
|
6 | CHZ- | Index channel signal complement |
|
|
|
7 | GND | Power supply ground |
|
|
|
8 | CHB | Channel B signal |
|
|
|
9 | CHA- | Channel A signal complement |
|
|
|
Description
Five identical encoder inputs, each with complementary A, B and Z channel inputs on a
Up to five incremental encoders may be connected to NextMove PCI. Each input channel uses a MAX3095 differential line receiver with pull up resistors and terminators. Encoders must provide either 5V differential signals or RS422/RS485 differential signals. The maximum input frequency is 7.5 million quadrature counts per second. This is equivalent to a maximum frequency for the A and B signals of 1.87MHz. The shell of the connector is connected to pin 4. The use of individually shielded twisted pair cable is recommended. See section 4.5.3 for details of the encoder power supply.
CHA+
CHA-
Breakout
module
X12
5
9
NextMove PCI
|
|
| Vcc |
100 |
|
| 3k3 |
pin |
|
| |
cable | 10R |
|
|
| 150R | 3k3 | MAX3095 |
| 10R |
| Encoder |
|
|
| |
|
|
| input |
|
|
| circuit |
Figure 7 - Encoder channel input circuit - Encoder C, Channel A shown
MN1903 | Input / Output |