37
NanoTrak Autoalignment Controller
4.2.3
Rear Panel Piezo In Connector
The Piezo In connector provides the feedback connection from the piezo actuators
(strain gauge).
The pin functions are detailed in Fig. 4.3..
Notes.
† Power supply for the piezo actuator feedback circuit. It must not be used to
drive any other circuits or devices.
* This signal is applicable only to Thorlabs actuators. It enables the system to
identify the piezo extension associated with the actuator.
‡ Software switchable signal for strain gauge or d.c. feedback, see Section D.1.2.
Fig. 4.3 Piezo In connector - pin identification
Note
For use with piezo actuators with feedback capability.
Pin
Description
Return
1
Wheatstone bridge excitation
4 or 6
2
† +15V
4 or 6
3
† -15V
4 or 6
4
‡ d.c.(+) or Equipment ground
5
Feedback signal in
4 or 6
6
Equipment ground
7
‡ d.c.(-) or Actuator ID signal*
4 or 6
8
RS485(-)
9
9
RS485(+)
8
5
4
3
2
1
9
8
7
6
