Position Synchronized Output Connector

Program the Position Synchronized Output (PSO) to generate an output that is synchronized to the feedback position of an axis. PSO is typically used to fire a laser or trigger an external hardware device. The XL4s supports three-axis PSO in Automation1 versions 2.4.0+. The XL4s supports dual-axis PSO in A3200 and Automation1 versions before 2.4.0.

A PSO firing event can be triggered from a feedback channel or from a software trigger. You can get quadrature signals from feedback channels and PSO firing event signals after a PSO firing event occurs. When the PSO generates pulses, minimum latency occurs between the trigger condition and the output.

Aerotech recommends that you use an RS-422 line receiver or an opto-isolator if your system:

  • Uses cables with long lengths in work areas where a lot of electrical noise occurs.
  • Uses high-frequency pulse transmission.

For best performance, put the RS-422 line receiver or the opto-isolator near the electronics that receive the PSO output pulse.

Table 2-7:     PSO Connector A Pinout

Pin #

Label

Description

In/Out/Bi

 Connector
1

O1+

PSO Output

Output
2

O1-

PSO Output

Output
3

O2+

 Reserved N/A
4

O2-

 Reserved N/A
5

O3+

 Reserved N/A
6

O3-

 Reserved N/A
7

GND

Ground

 N/A

Table 2-8:     PSO Connector B Pinout

Pin #

Label

Description

In/Out/Bi

 Connector
1

O1

PSO Output (5V TTL)

Output
2 GND Ground N/A
3

O2

Reserved

N/A
4 GND Ground N/A
5

O3

Reserved

N/A
6

GND

 Ground N/A
7

+5V

5 Volt Power Supply (500 mA)

 Output

Table 2-9:     Mating Connector Part Numbers for the PSO Connectors

Specification Description
Type 7-Pin Terminal Block
Part Numbers Aerotech: ECK02403
Phoenix: 1908114

Conductor Cross Section

 Solid or stranded 20...26 AWG (0.14...0.5 mm2)
Stranded, with ferrule, without plastic sleeve 20...24 AWG (0.25...0.5 mm2)
Conductor Insulation Strip Length 8 mm (5/16 in)

(1) Refer to the manufacturer website for additional information.

Table 2-10:     PSO Specifications

Specification

Value

Maximum PSO Output (Fire) Frequency

TTL

12.5 MHz

Isolated

5 MHz

Output Latency

[Fire event to output change]

TTL

60 ns

Isolated

160 ns

1. Signals in excess of this rate will cause a loss of PSO accuracy

Figure 2-5:     PSO Outputs

Figure 2-6:     Current Sinking Configuration with Isolation

 

Figure 2-7:     Current Sinking Configuration without Isolation

Figure 2-8:     Current Sourcing Configuration with Isolation

 

Figure 2-9:     Current Sourcing Configuration without Isolation

Figure 2-10:     TTL Output