Installation and Configuration
2.4.1. Position Synchronized Output (PSO)
The PSO can be programmed to generate an output synchronized to the feedback position and is typically
used to fire a laser or sequence an external device. Trigger signals may be derived from a feedback channel
or a software trigger. The position synchronized output pulse is generated using high-speed hardware,
allowing minimal latency between the trigger condition and the output.
An RS-422 line receiver or opto-isolator is recommended, especially when using long cable lengths in noisy
environments or when high frequency pulse transmission is required. It is best to locate the line receiver or
opto-isolator close to the receiving electronics.
Table 2-13:
PSO Specifications
Specification
Maximum Input Tracking Rate
Maximum Quadrature Encoder Output
Frequency
Maximum PSO Output (Fire) Frequency
Firing Latency
1.
Signals in excess of this rate will cause a loss of PSO accuracy.
2.
The optocoupler that you use on the output might have an effect on this rate.
Table 2-14:
PSO Output Pinout TB101 (A)
Pin #
Label
Description
1
O1+
Laser Output 1+ / PSO Output
2
O1-
Laser Output 1- / PSO Output
30
Single-Axis Tracking
(1)
Dual-Axis Tracking
-MXH Feedback
Isolated
(2)
TTL
Single-Axis Tracking
Dual-Axis Tracking
Chapter 2
Nmark GCL Hardware Manual
www.aerotech.com
Value
16.6 MHz
15 MHz
30 MHz
5 MHz
12.5 MHz
80 nsec
110 nsec
In/Out/Bi
Output
Output