Aerotech Automation1 XC6e Series, Hardware Manual

Page: 61 / 110

2.5.2. Position Synchronized Output (PSO)
The PSO signal is available on the dual-function AUX Marker/PSO signal lines. Use the PSO pulse external
sync functions to configure the auxiliary marker as an output. Refer to the Help file for more
information.
Use the PsoOutputConfigureOutput() function to transmit the PSO output signal on the Marker ± pins
differentially. Or, use the PsoOutputConfigureOutput() function to configure the Marker - pin as a
5V TTL PSO 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
Table 2-36 ), are not actively driven and the fail safe state is
defined by pull-up and pull-down resistors as shown in Figure 2-27 .
The -EB1 I/O option board has additional PSO signal formats. Refer to Section 3.5. for more information.
Table 2-35: PSO Specifications
Specification Value
Output TTL 5 V, 16 mA (max)
Maximum PSO Output (Fire) Frequency
TTL 12.5 MHz
RS-422 12.5 MHz
Output Latency
[Fire event to output change] TTL 15 ns
RS-422 15 ns
Table 2-36: PSO Pins on the Auxiliary I/O Connector
Pin# Description In/Out/Bi
19 Auxiliary Marker- / PSO output / TTL Output Bidirectional
20 Auxiliary / PSO output Bidirectional
21 Common N/A
XC6e Hardware Manual 2.5. Auxiliary I/O Connector
www.aerotech.com 61