Table of Contents
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Introduction
WARNING
Equipment
Required
Service Aids
Digital I/O Module
Description
Chapter 4
This chapter contains service information for the HP E1330A/B Quad 8-Bit
Digital I/O Modules. Also included are trouble shooting, repair, and
maintenance guidelines.
Do not perform any of the service procedures shown unless
you are a qualified, service-trained technician and have read
the WARNINGS and CAUTIONS in Chapter 1.
Equipment required for module troubleshooting and repair is listed in Table
1-1, Recommended Test Equipment. Any equipment that satisfies the
requirements given in the table may be substituted. To avoid damage to the
screw head slots, use a T8 Torx driver to remove the front panel handles.
See Chapter 3 — Replaceable Parts for descriptions and locations of HP
E1330A/B replaceable parts. Service notes, manual updates, and service
literature for the modules may be available through Hewlett-Packard. For
information, contact your nearest Hewlett-Packard Sales and Service Office.
The HP E1330A/B provides four independent 8-bit digital I/O ports
compatible with TTL logic levels. Each port can be software configured for
operation as either input or output with either positive or negative true logic.
The ports can be combined to provide 16 bit (WORD) or 32 bit (LWORD)
operations.
In addition to the eight digital data lines, six handshake lines are included
per port. The handshake lines can also be combined (via jumpers on the
component assembly) to provide proper handshaking for combined ports.
The data lines of each port are provided with a jumpered pull-up resistors
for dry contact closure sensing. User connections to the Digital I/O module
are made through two 60-pin connectors on the rear panel.
Chapter 4
Service
Service 33
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