PCI-1720 & 1720U User Manual
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Chapter 1 General Information
1.1 Introduction
PCI-1720 cards are isolated analog output cards. They provide four 12-bit
analog output channels with isolation protection of 2,500 V DC between
the outputs and the PCI bus. This is ideal for industrial applications
where high-voltage protection is required. PCI-1720U is also equipped
with a universal PCI interface.
Keeping the Output Settings and Values after System Reset
The four outputs can be set independently to different ranges:
0 to +5 V, 0 to +10 V, ±5 V, ±10 V, 0 to 20 mA (sink) or 4 to 20 mA
(sink). When the system is hot reset (the power is not shut off),
PCI-1720 cards can either retain the last analog output settings and val-
ues, or return to its default configuration based on its jumper setting. This
practical function eliminates danger caused by misoperation during
unexpected system resets.
PCI-bus Plug & Play
The PCI-1720 cards use a PCI controller to interface the cards to the PCI
bus. The controller fully implements the PCI bus specification Rev 2.1.
All bus relative configurations, such as base address and interrupt assign-
ment, are automatically controlled by software.
1.2 Features
• Four 12-bit D/A output channels
• Multiple output ranges
• 2500 V
DC
isolation between the outputs and the PCI bus
• Keeps the output settings and values after system reset
• One 37-pin D-type connector for easy wiring
• BoardID switch
• Universal PCI Bus (PCI-1720U only)
• Glitch-free power up
