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AVME948x USER'S MANUAL Digital I/O Board
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The information contained in this manual is subject to change
without notice. Acromag, Inc. makes no warranty of any kind with
regard to this material, including, but not limited to, the implied
warranties of merchantability and fitness for a particular purpose.
Further, Acromag, Inc. assumes no responsibility for any errors that
may appear in this manual and makes no commitment to update, or
keep current, the information contained in this manual. No part of
this manual may be copied or reproduced in any form, without the
prior written consent of Acromag, Inc.
Table of Contents Page
1.0 GENERAL INFORMATION............................................... 2
KEY FEATURES OF MODEL AVME948x I/O BOARDS.. 2
VMEbus INTERFACE FEATURES................................... 3
2.0 PREPARATION FOR USE................................................ 3
UNPACKING AND INSPECTION..................................... 3
CARD CAGE CONSIDERATIONS................................... 3
BOARD CONFIGURATION.............................................. 3
Default Jumper Configuration......................................... 3
ADDRESS ASSIGNMENT................................................ 3
PORT JUMPERS AND OPTIONS.................................... 3
Input Threshold Adjustment.......................................... 4
I/O CONNECTIONS.......................................................... 4
BACKPLANE REQUIREMENTS...................................... 5
USE WITH SOLID-STATE RELAYS................................ 5
Configuring The AVME948x......................................... 5
Configuring The PB16A................................................ 6
USE WITH OTHER DEVICES......................................... 6
Relays And Other Inductive Loads................................ 6
Contact Closures and Switches.................................... 6
3.0 PROGRAMMING INFORMATION.................................... 6
MEMORY MAPS............................................................... 6
Board Identification PROM............................................. 6
Status/Control Register.................................................. 7
VME Interrupter.............................................................. 8
Interrupt Pending/Clear Register.................................... 8
Interrupt Inputs Register................................................ 8
Interrupt Enable Register............................................... 8
Interrupt Level Register.................................................. 8
Interrupt Input Polarity Register...................................... 8
Interrupt Vector Registers.............................................. 8
Digitial I/O Port Registers............................................... 8
INTERRUPT BEHAVIOR................................................... 9
Interrupt Example........................................................... 9
Service of Interrupts....................................................... 9
4.0 THEORY OF OPERATION............................................... 9
VMEbus INTERFACE.................................................... 9
The VME Address Logic................................................. 9
The VME Control Logic................................................... 10
The VME Interrupter........................................................ 10
DIGITAL I/O PORT REGISTERS....................................... 10
Input Comparators/Buffers............................................. 10
Output Latches/Drivers.................................................. 10
5.0 SERVICE AND REPAIR INFORMATION......................... 10
SERVICE AND REPAIR ASSISTANCE........................... 10
PRELIMINARY SERVICE PROCEDURE......................... 10
CALIBRATION PROCEDURE.......................................... 11
REPLACEABLE PARTS.................................................. 11
6.0 SPECIFICATIONS.............................................................
11
DRAWINGS Page
4500-981 Jumper Locations................................................... 12
4500-788 9921-16 Digital I/O Adapter Card........................... 13
4500-789 9921-32 Digital I/O Adapter Card........................... 14
4500-790 9921-16 Connection Diagram................................ 15
4500-791 9921-32 Connection Diagram................................ 16
4500-786 9920-16 Digital I/O Adapter Card........................... 17
4500-787 9920-32 Digital I/O Adapter Card........................... 18
4500-785 9920-16 Connection Diagram................................ 19
4500-792 9920-32 Connection Diagram................................ 20
4500-743 Relay Driver & Input Configurations....................... 21
4500-740 VME Interrupter Block Diagram............................. 22
4500-741 AVME 9480 Block Diagram................................... 23
4500-742 AVME 9480 Simplified Schematic......................... 24
4500-737 Digital I/O Card...................................................... 25
IMPORTANT SAFETY CONSIDERATIONS
It is very important for the user to consider the possible adverse
effects of power, wiring, component, sensor, or software failures in
designing any type of control or monitoring system. This is
especially important where economic property loss or human life is
involved. It is important that the user employ satisfactory overall
system design. It is agreed between the Buyer and Acromag, that
this is the Buyer's responsibility.
1.0 GENERAL INFORMATION
The AVME948x Digital Input/Output Boards provide a means for
interfacing various discrete devices to a VMEbus based computer.
Interfacing is accomplished via software control of 64 general
purpose I/O points which may be individually programmed as inputs
or outputs. Additionally, eight of these 64 I/O lines may be
configured to generate VMEbus interrupts.
This manual covers two models of Digital I/O Boards. Table 1.1
below lists these model numbers and their major differences.
Table 1.1 Model Numbers
MODEL NO.
INTERFACE
POINTS
FRONT PANEL
ACCESS
REAR
ACCESS
AVME 9480 64 I/O P3, P4
AVME 9481 64 I/O P2
KEY FEATURES OF MODEL AVME948x I/O BOARDS
•
High Channel Count - Provides up to 64 programmable I/O
points (lines) configured as eight 8-bit ports, or four 16-bit
ports.
•
Output Readback - The state of output points can be read.
•
High Sink Capability - Outputs may sink up to 100mA at
voltages up to 30V.
•
Output Protection - Built in protection diodes for driving
inductive loads.
•
Wide Input Range - Input range of 0 to 30V.
•
Wide Input Hysteresis - Input hysteresis is included.
•
Adjustable Input Threshold - Input threshold is adjustable.
•
Termination Panel/Solid-State Relay Interface - Compatible
with industry standard solid-state relays and termination
panels, PB16 and PB32.
•
TTL/CMOS - TTL and CMOS compatible.
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