Square Wave Encoder; Figure 2-9: Square Wave Encoder Schematic (Axis Connector); Table 2-13: Square Wave Encoder Specifications - Aerotech Automation1 SI4 Series Hardware Manual

2.2.5.1. Square Wave Encoder
2.2.5.1. Square Wave Encoder
The SI4 supports both single-ended and differential encoder feedback signals.
For single-ended feedback configuration, use the Sine +, Cosine +, and Marker + inputs. Do not connect
the Sine -, Cosine - and Marker - inputs. Set the FeedbackSetup parameter to configure the hardware for
single-ended encoder feedback devices.
For differential feedback configuration, the SI4 accepts RS-422 square wave encoder signals. The SI4 will
generate a feedback fault if it detects an invalid signal state caused by an open or shorted signal
connection. Use twisted-pair wiring for the highest performance and noise immunity.
Table 2-13: Square Wave Encoder Specifications
Specification
Encoder Frequency
x4 Quadrature Decoding
Figure 2-9:
38
10 MHz maximum (25 ns minimum edge separation)
Square Wave Encoder Schematic (Axis Connector)
SI4 Hardware Manual
Value
40 million counts/sec
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