Technical data

Publication 1794-2.1 - January 2000
FLEX I/O and FLEX Integra Product Data Overview 3
Overview
About the FLEX I/O System
FLEX I/O consists of three space-saving components:
• adapters
• terminal base units
• I/O modules
For information on See page
1794 FLEX I/O 3
1793 FLEX Integra 4
1794-IB16
Adapter
Terminal Base
I/O Module
Flexbus Connectors
Keyswitch
Flexbus
Connector
Terminal Strips
Remote I/O
Connector
24V dc field power connection
terminals (externally provided)
Use the adapter to power the internal
logic for as many as eight I/O modules
and transfer the I/O data back to a
PLC

processor or a SLC

processor via
one of several available networks.
Two separate connection terminals
for field power let you daisy-chain
power connections to adjacent
terminal bases.
Insert the terminal base into your system using the
positive-locking flexbus connectors.
Use a three-wire terminal base to wire directly to a
two- or three-wire device.
Terminate most of your wiring on the terminal base
with almost no need for terminal blocks.
Use the terminals to daisy-chain power connections
to adjacent terminal bases, or connect individual power
supplies to each base to isolate modules.
Adjust the keyswitch to prevent incorrect module
insertion into a preconfigured terminal base.
Exchange terminal bases without moving other bases
in your system.
Plug the I/O module into the
terminal base. Use the module to
connect to the I/O bus and field
devices.
Remove and insert a module
without disturbing the field wiring,
other I/O modules, or system power.
20125
ATTENTION
!
Remove field-side power before removing or
inserting an I/O module. Modules are designed so
you can remove and insert them under backplane
power. When you remove or insert a module while
field-side power is applied, you may cause an
electrical arc. An electrical arc can cause personal
injury or property damage because it may:
• send an erroneous signal to your system’s field
devices causing unintended machine motion
• cause an explosion in a hazardous environment
Repeated electrical arcing causes excessive wear to
the contacts on both the module and its mating
connector. Worn contacts may create electrical
resistance.