Specifications

1 Publication 1794-RM001F-EN-P - September 2011

Chapter

FLEX I/O Modules

This chapter discusses the FLEX I/O modules that are SIL2 certified.

Overview of FLEX I/O

Modules

In the most basic description, there are two types of SIL2-certified FLEX I/O

modules:

• Digital I/O modules

• Analog I/O modules

With each type, however, there are differences between specific modules.

Because the differences propagate to varying levels in each module type, a

graphical representation can best provide an overview of the many

SIL2-certified FLEX I/O modules.

FLEX I/O modules are designed with inherent features that assist them in

complying with the requirements of the 61508 Standard. For example, the

modules all have a common backplane interface, execute power-up and

runtime diagnostics, and offer electronic keying.

Table 1.1 lists the FLEX I/O modules initially submitted for SIL2

certification.

For information about: See page:

Overview of FLEX I/O Modules 3-1

Using Digital Input Modules 3-2

Wiring FLEX I/O Digital Input Modules 3-3

General Considerations when using Any FLEX

I/O Digital Output Module

3-4

Wiring FLEX I/O Digital Output Modules 3-5

Using Analog Input Modules 3-7

Wiring FLEX I/O Analog Input Modules 3-9

Checklist for SIL Inputs 3-18

Checklist for SIL Outputs 3-19

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com