Measurement PCI-CTR05 User Manual

PC104-PDISO8

User’s Manual

Revision 3

October, 2000

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1 INTRODUCTION ....................................

2 INSTALLATION .....................................

3 REGISTER DESCRIPTIONS ...........................

4 ELECTRONICS AND INTERFACING ..................

5 SPECIFICATIONS ..................................

1

11.1 DESCRIPTION ...................................

11.2 ACCESSORIES ...................................

2

22.1 SOFTWARE ......................................

22.2 BASE ADDRESS ..................................

32.3 AC INPUT FILTER ................................

5

53.1 INTRODUCTION .................................

63.2 OUTPUT REGISTER ...............................

73.3 INPUT REGISTER .................................

8

84.1 I/O CONNECTOR ................................

94.1 FORM C RELAY OUTPUTS .........................

94.2 FORM A RELAY OUTPUTS .........................

104.3 ISOLATED INPUTS ..............................

104.4 EXTENDING THE INPUT RANGE ...................

11

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1 INTRODUCTION

1.1 DESCRIPTION

The PC104-PDISO8 has 8-channels of isolated inputs and relay outputs. The board is
designed for sensing and control applications having high voltages.

WARNING!

High voltages will be present on the board when you have
connected high voltage inputs or outputs to the connector.
Use extreme caution! Never handle the board when live signals are
connected to the board via the connector.

The eight outputs are electromechanical relays. Five provide FORM C connections
and three provide normally-open FORM A connection. The relays are controlled by
writing to one 8-bit port. The state of the relay control register may be read back.

The inputs are eight individual, optically-isolated inputs that may be read back as a
single byte. The inputs are not polarity sensitive and may be driven by either AC
(input range −24V to +24V RMS, 50 to 1000 Hz) or DC (input range −24V to
+24VDC). Each input has a switchable low-pass filter.

Although requiring only two, 8-bit ports, the board occupies four ports.

1.2 ACCESSORIES

The PC104-PDISO8 is a combination digital I/O board with signal conditioning
installed. Most accessory boards are intended to provide signal conditioning or easy
to access signal termination. In general, it does not require additional signal
conditioning.

WARNING

We strongly recommend
PC104-PDISO8. The board is intended to sense and control high voltages. A screw
terminal board would expose yourself and others to high voltage signals.
Rather, we recommend that you construct a safe cable to carry your signals directly
from your equipment to the board’s connector.

against

using screw terminal boards with the

1

2.1 SOFTWARE

2 INSTALLATION

Before you open your computer and install the board, install and run
installation, calibration and test utility included with your board.
you through switch and jumper settings for your board. Detailed information
regarding these settings can be found below. Refer to the

Installation Manual

for

Insta

Cal installation instructions.

Insta

Cal, the

Insta

Cal will guide

Extended Software

2.2 BASE ADDRESS

The base address switch controls the I/O location where the CPU can access the
board’s registers.

The factory default is 300 hex (768 decimal).

If you already have a board installed at address 300h, choose a new address from
those available on your computer.
Use the list of PC I/O address
assignments found in Table 2-1 to
determine the appropriate address.

Choose a new base address from
those available and set the switch
using the guide to the right.

If 300 hex is available on your
computer, there is no need to
change this switch from the factory
default setting.

Figure 2-1. Base Address Switch

2