Installation manual

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Input / Output 4-17MN1933
4.5 Other I/O
4.5.1 Encoder inputs - X12, X13, X14, X15, X16
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
Up to five incremental encoders may be connected to NextMove PCI-2. Each encoder input
comprises complementary A, B and Z channel inputs on a 9-pin female D-type connector.
Each channel uses a MAX3096 differential line receiver with pull up resistors and terminators.
Encoders must provide either 5 V differential signals or RS422/RS485 differential signals. The
maximum input frequency is 10 million quadrature counts per second. This is equivalent to a
maximum frequency for the A and B signals of 2.5 MHz. The shell of the connector is
connected to pin 4. The use of individually shielded twisted pair cable is recommended. See
section 4.5.2 for details of the encoder power supply .
CHA-
CHA+
Encoder
input
circuit
Vcc
NextMove PCI-2
MAX3096
150R 3k3
3k3
Breakout
module
5
9
100
way
cable
‘X12’
Figure 10 - Encoder channel input circuit - Encoder C, Channel A shown
15
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