Specifications

71 Publication 1794-SG002D-EN-P - May 2012
Section 2.1
About the FLEX Ex I/O Systems
1797 FLEX Ex I/O Overview
FLEX Ex I/O offer:
FLEX Ex I/O leverages advanced technologies allowing the application to
move to a distributed architecture in the hazardous area. We have taken our
experience gained with the standard FLEX I/O system and used it to create an
intrinsically safe system with the same look, feel, and ease of use.
Mounts without purged or explosion-proof enclosures in the hazardous area.
FLEX Ex I/O is a modular I/O system that eliminates the need for Intrinsic
Safety (IS) barriers/isolators or long wiring runs to the control cabinet.
One adapter communicates with up to eight I/O modules. Allows connection
to:
• 128 digital inputs/outputs, or
• 64 analog inputs, or
• mix to meet your needs.
Redundant media ControlNet adapter communicates with up to eight I/O
modules and can be mounted in the hazardous area.
Adjust the keyswitch to prevent incorrect module insertion into a preconfigured
terminal base.
Exchange terminal bases without moving other bases in your system.
Connect FLEX Ex power supplies to the terminal base that provides power to
the I/O modules and field devices. No additional power supplies are needed.
Bus connectors
Adapter Terminal base I/O module
Keyswitch
FlexBus
connectors
Terminal strips
24V DC field power