SDQLCAI-1 Introduction
May 2002 1-1
1 Introduction
This Instruction provides installation and service information for the QUADLOG
Critical Analog Input
Module (CAI) model QLCAIAAN.
It is divided into six major sections as follows:
Section 1, Introduction - Summarizes the information presented in this document. In addition, it
presents a description of the product, provides information about obtaining product support, furnishes
the definitions and usage of international symbols, and supplies a list of related literature.
Section 2, Installation - Describes the mechanical and electrical installation of the product and its
associated signal wire termination hardware. This includes procedures for proper preparation,
identification, and handling of the product. It also lists environmental considerations and provides
overview information about software-based product configuration.
Section 3, Maintenance - Provides information about preventive maintenance, troubleshooting
techniques, assembly replacement, and choosing spare and replacement parts.
Section 4, Circuit Description - Contains a brief block diagram level description of the product. It
explains how the CAI processes I/O signals and operates in conjunction with a control module.
Section 5, Model Designation - Provides model designation and tables of accessories, attachments,
and options.
Section 6, Specifications - Lists the product’s mechanical, electrical, and environmental
specifications.
1.1 Product Description
The QUADLOG Critical Analog Input Module (CAI) is part of the QUADLOG family of safety critical
control and I/O modules. It is ideally suited for such applications as emergency shutdown or burner
management. The CAI uses standard QUADLOG module packaging. It plugs into any of the standard
module racks, where it operates in conjunction with a QUADLOG resource module such as a Critical
Control Module (CCM) as part of a data acquisition and control system. It is an intelligent
(microprocessor-based), configurable I/O module that interfaces 32 channels of analog input signals
between field devices and the IOBUS. The CAI and its associated wiring termination hardware are
shown in Figure 1-1. As shown, field wiring is connected to a remote mounted Marshalled Termination
Assembly. The operating status of the CAI is shown by two bezel-mounted LED indicators.
Using the 4-mation™ Configuration software in conjunction with QUADLOG software configures the
CAI. This software runs on an MS Windows® based personal computer. The configuration is developed
off-line as part of a control module (CCM) configuration. When the configuration is transferred from
4-mation to the control module, the CAI portion is automatically copied from the control module to the
CAI.
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