Stepper Clock And Stepper Direction Signals; Figure 2-2: Stepper Clock And Stepper Direction Timing; Table 2-5: Clock And Direction Pins On The Axis Connector; Table 2-6: Stepper Clock And Stepper Direction Signal Output Specifications - Aerotech Automation1 SI4 Series Hardware Manual

SI4 Hardware Manual

2.2.1. Stepper Clock and Stepper Direction Signals

The SI4 uses the Stepper Clock and Stepper Direction outputs to interface to stepper motor drivers.
Table 2-5: Clock and Direction Pins on the Axis Connector
Pin # Description
16 Stepper Clock
17 Stepper Direction
Table 2-6: Stepper Clock and Stepper Direction Signal Output Specifications
Specification
Output Voltage
Maximum Output Frequency
Maximum Source / Sink Current
Clock Default State
Direction Default State
Maximum Clock Pulse Width
Minimum Clock Pulse Width
To change the direction of the rotation of the motor, reverse the polarity of one of the phases. Reverse
the A and A-N or B and B-N wires at the stepper motor driver.
Table 2-7: Stepper Direction Signal Output Polarity
Specification
Negative / CCW Direction
Positive / CW Direction
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2.2.1. Stepper Clock and Stepper Direction Signals
Figure 2-2: Stepper Clock and Stepper Direction Timing
In/Out/Bi
Value
5V TTL
25 MHz
±20 mA
Logic Low (0 V)
Logic Low (0 V)
25 µs
20 ns
Value
Logic Low (0 V)
Logic High (+5 V)
Output
Output
31