3. External Connection
PIO-32/32F(PCI)H
Connecting Output Signals
Connect the output signals to a current-driven controlled device such as a relay or LED.
The connection requires an external power supply to feed currents.
The board controls turning on/off the current-driven controlled device using a digital value.
Output Circuit
Figure 3.7. Output Circuit
The output circuits of interface blocks of the PIO-32/32F(PCI)H are illustrated in Figure 3.7. The signal
output section is an opto-coupler isolated, open-collector output (current sink type). Driving the output
section requires an external power supply isolated from the PC system. The rated output current per
channel is 50 mA at maximum.
A zener diode is connected to the output transistor for protection from surge voltages.
For every eight output-lines, a self-recovery Ployswitch is equipped on board for over-current protection.
Should this Polyswitch be acting, the related output lines will not function correctly.
You must release the load from these output lines or you have to turn off the external power supply off
for at least several minutes. You should also check your application to find what is wrong and recover it
before you connect the application to these output lines again or turn on the external power supply again.
When the PC is turned on, all outputs are reset to OFF.
Summary of Contents for PIO-32/32F(PCI)H
Page 7: ...PIO 32 32F PCI H...
Page 41: ...2 Setup PIO 32 32F PCI H...
Page 51: ...3 External Connection PIO 32 32F PCI H...
Page 55: ...4 Function PIO 32 32F PCI H...
Page 65: ...6 About Hardware PIO 32 32F PCI H Table 6 1 Specification 2 2 Board Dimensions...
Page 66: ...6 About Hardware PIO 32 32F PCI H Block Diagram Figure 6 1 Block Diagram...
