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PCI-1720U User Manual 2

Chapter 1 General Information

1.1 Introduction

PCI-1720U is an isolated digital-to-analog output card for the Universal

PCI bus. It provides 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.

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-1720U can either retain the last analog output settings and values, 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-1720U uses a PCI controller to interface the card 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

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

• Glitch-free power up

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