3. External Connection
PIO-16/16B(PCI)H, PI-32B(PCI)H, PO-32B(PCI)H
35
Output Circuit
Connect the output signals to a current-driven controlled device such as a relay or LED. The board
controls turning on/off the current-driven controlled device using a digital value.
Output Circuit
* Output pin represent output signals.
Figure 3.7. Output Circuit <PIO-16/16B(PCI)H>, <PO-32B(PCI)H>
The output circuits of interface blocks of the PIO-16/16B(PCI)H and PO-32B(PCI)H are illustrated in
Figure 3.7. The signal output section as an opto-coupler-isolated open-collector output (current sink
type). To drive the output section, the on-board internal power supply must be used or an external
power supply is required.
The rated output current per channel is 100 mA at maximum.
The output section can also be connected to a TTL level input as it uses a low-saturated transistor for
output. The residual voltage (low-level voltage) between the collector and emitter with the output on
is 0.5 V or less at an output current within 50 mA or at most 1.0 V at an output current within 100 mA.
To protect against surge voltage, a Zener diode is connected to the output transistor. Also, an
overcurrent protection circuit is attached to a unit of eight output channels.
When the PC is turned on, all output are reset to OFF. See the “Selecting the internal or external
power supply” section to connect the jumpers depending on the power supply to be used.
Vcc
JP2
<PIO-16/16B(PCI)H>
JP2/JP4 <PO-32B(PCI)H>
JP1
<PIO-16/16B(PCI)H>
JP1/JP3 <PO-32B(PCI)H>
+12V
Board
External device
Plus
common
Minus
common
Output pin
Output pin
Load
Load
External
power supply
12 - 24VDC
Zener
diode
Zener
diode
Over current protection
Optocoupler
Optocoupler
CAUTION
Summary of Contents for PI-32B(PCI)H
Page 15: ...1 Before Using the Product 8 PIO 16 16B PCI H PI 32B PCI H PO 32B PCI H ...
Page 45: ...3 External Connection 38 PIO 16 16B PCI H PI 32B PCI H PO 32B PCI H ...
Page 49: ...4 Function 42 PIO 16 16B PCI H PI 32B PCI H PO 32B PCI H ...
Page 55: ...5 About Software 48 PIO 16 16B PCI H PI 32B PCI H PO 32B PCI H ...