Appendix C — Connector Pin Assignments
C - 9
Encoder B(+) Input, Axis 1, 2, 3, 4
The B(+) input is pulled-up to +5 volts with a 1K
Ω
resistor. The signal is
buffered with a 26LS32 differential receiver. The B(+) encoder encoded
signal originates from the stage position feedback circuitry and is used for
position tracking.
Home Input, Axis 1, 2, 3, 4
This input is pulled-up to +5 volts with a 1K
Ω
resistor. The Home signal
originates from the stage and is used for homing the stage to a repeatable
location.
Index(+) Input, Axis 1, 2, 3, 4
The (+)Index input is pulled-up to +5 volts with a 1K
Ω
resistor and is
buffered with 26LS32 differential receiver. The (+)Index signal originates
from the stage and is used for homing the stage to a repeatable location.
Reset Output From Controller
The Reset output is a TTL buffered output which represents ESP6000
hardware reset status of the controller itself. When the controller is held
in a reset state this output is a logical LOW. When connected to the
UniDrive6000 this output resets all driver channels.
Servo DAC Output, Axis 1, 2, 3, 4
The servo digital-to-analog converter (DAC) output is the (10 volt control
signal used to control DC servo motors. This signal is the output of the 18-
bit servo DAC.
Travel Limit (-) Input, Axis 1, 2, 3, 4
This input is pulled-up to +5 volts with a 4.7K
Ω
resistor and represents the
stage negative direction hardware travel limit. The active true state is
user-configurable. The default is active HIGH.
Travel Limit(+) Input, Axis 1, 2 3, 4
This input is pulled-up to +5 volts with a 4.7K
Ω
resistor and represents the
stage positive direction hardware travel limit. The active true state is
user-configurable. The default is active HIGH.
C.1.3 Digital I/O (50-Pin) JP4 Connector
This connector provides access to the ESP6000 Opto22
compatible 24-bit
digital I/O interfaces. Connector pin-outs are listed in Table C.1-3, and
functionally described in the following paragraphs.
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