Position Synchronized Output (Pso); Table 2-38: Pso Specifications; Table 2-39: Pso Pins On The Auxiliary I/O Connector - Aerotech Automation1 iXC4e Hardware Manual

iXC4e/XC4e

2.5.2. Position Synchronized Output (PSO)

The PSO signal is available on the dual-function AUX Marker/PSO signal lines. Use the
external sync functions [A3200: PSOOUTPUT PULSE EXTSYNC command]
marker as an output. Refer to the
Use the PsoOutputConfigureOutput() function [A3200: PSOOUTPUT CONTROL command] to
transmit the PSO output signal on the Marker ± pins differentially. Or, use the
PsoOutputConfigureOutput() function [A3200: PSOOUTPUT CONTROL command] to configure the
Marker - pin as a 5V TTL PSO output.
When configured for differential use with pin 19 as PSO Differential Output - and pin 20 as PSO
Differential Output +, the PSO output is active low.
so that the output is in the OFF state when it is not actively driven. If you want an active high output,
you can change the pins so that pin 19 is the PSO Differential Output + and pin 20 is the PSO
Differential Output -.
The differential signal format is recommended when using long cable lengths in noisy environments
or when high frequency pulse transmission is required. It is best to locate the line receiver close to
the receiving electronics. A 5 V TTL signal is used to drive an opto coupler or general purpose
TTL input. This signal is active high and is driven to 5 V when a PSO fire event occurs. When the drive
is reset or after initial power up, the PSO pins (refer to
safe state is defined by pull-up and pull-down resistors as shown in
The -EB1 I/O option board has additional PSO signal formats. Refer to
information.
Table 2-38: PSO Specifications
Specification
Output
Maximum PSO Output (Fire) Frequency
Output Latency
[Fire event to output change]
Table 2-39: PSO Pins on the Auxiliary I/O Connector
Pin# Description
19 Auxiliary Marker - / PSO Differential Output - / PSO TTL Output
20 Auxiliary Marker + / PSO Differential Output +
21 Common
70
Help file for more information.
Figure 2-39
Table
TTL
TTL
RS-422
TTL
RS-422
Hardware Manual
to configure the auxiliary
shows how the output pins are biased
2-39), are not actively driven and the fail
Figure 2-39.
Section 3.5. for more
Value
5 V, 16 mA (max)
12.5 MHz
12.5 MHz
15 ns
15 ns
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PSO pulse
In/Out/Bi
Bidirectional
Bidirectional
Output