Datasheet

PD20-1-1210 Hardware Manual • Hardware Version V1.10 | Document Revision V1.20 • 2019-APR-03

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4.1 Power, RS485 and HOME connector

The PD20-1-1210 oﬀers one 5pin JST PH series combined connector for power supply input, RS485 2-wire

serial communication and one digital input. The digital input might be used either as general purpose

input or as stop switch (STOP_L or STOP_R) or HOME switch input.

Power, RS485 and HOME Connector Pin Assigment

Pin Label Direction Description

1 GND Power (GND) Common system supply and signal ground

2 V

Power (input) Main power supply input for the driver and on-board logic

6. . . 30V

3 RS485- Bidirectional RS485 interface, diﬀ. signal (inverting)

4 RS485+ Bidirectional RS485 interface, diﬀ. signal (non-inverting)

5 IN0 Input General purpose, STOP_L, STOP_R or HOME input.

Table 5: Power, RS485 and HOME Connector pin assignment

NOTICE

Do not connect or disconnect motor during operation!

Motor cable and mo-

tor inductivity might lead to voltage spikes when the motor is (dis)connected

while energized. These voltage spikes might exceed voltage limits of the driver

MOSFETs and might permanently damage them. Therefore, always switch oﬀ

/ disconnect power supply or at least disable driver stage before connecting /

disconnecting motor.

NOTICE

Take care of polarity, wrong polarity can destroy the board!

4.2 Motor Connector

A second 4pin JST PH series connector is available for connection of a 2-phase bipolar stepper motor.

Motor Connector Pin Assignment

Pin Label Direction Description

1 B2 out Pin 2 of motor coil B

2 B1 out Pin 1 of motor coil B

3 A2 out Pin 2 of motor coil A

4 A1 out Pin 1 of motor coil A

Table 6: Motor Connector Pin Assignment

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