ADLINK PCI-8134A - Manual (Page 39)

Signal Connections
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If the signal voltage of pulser is not +5V or if the pulser is distantly placed, it
is recommended to put a photo coupler or line driver in between. Also, +5V
and GND power lines of CN3 are direct from the PCI bus. Please carefully
use these signals because they are not isolated.
3.12
Simultaneously Start/Stop Signals STA and
STP
The PCI-8134/PCI-8134A provides the STA and STP signals, which enable
simultaneous start/stop of motions on multiple axes. The STA and STP
signals are on the CN4.
In order to implement axes synchronous control between different cards,
both PCI-8134 and PCI-8134A are able to synchronize the axes control
through simultaneous control signals, STA and STP. User is able to connect
each STA and STP signal via CN4 connector as the following illustration.
Also user would use external signals to trigger the simultaneous axes
control.
VCC VCC
Motion ASIC
STP
STP, AXIS 3&4
STA, AXIS 3&4
STP, AXIS 1&2
STA, AXIS 1&2
2
3
4
5
4.7K 4.7K
CN4
Inside PCI-8134/PCI-8134A
STA
STP
STA
VCC
PA,PB
Motion ASIC
PA, PB