In-Cabinet Distributed I/O

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1794 FLEX I/O

Product Design



FLEX I/O modules offer 4 through 32 I/O each. You can plug together a maximum of eight I/O modules into a FLEX I/O assembly, for a maximum of 256 I/O per assembly. The I/O modules are interfaced to the I/O link through an I/O adapter module with a built-in 24V DC input power supply. The I/O modules receive power from the adapter/power-supply through the backplane. Two 120/230V AC-to-24V DC power supplies are also available for powering the adapter/power-supply.

The backplane is formed by modular terminal bases that also provide terminal connection points for I/O wiring. I/O circuitry is packaged in separate I/O modules. Each I/O module plugs into an individual terminal base. The I/O adapter module plugs into the end terminal base. You snap the I/O adapter and the terminal bases onto a DIN rail and plug them together. FLEX I/O assemblies can be mounted horizontally or vertically.

The FLEX I/O family consists of modular components that snap together and mount onto a DIN rail to form the FLEX I/O assembly:

• I/O Adapter. A FLEX I/O adapter module provides an interface for communication between the I/O modules and a scanner port across an I/O link. Each terminal base provides backplane connections between the I/O adapter module and I/O modules.
  
• I/O Module. FLEX I/O modules plug into a terminal base, and connect to the I/O bus and field devices. Removal and Insertion Under Power (RIUP) makes it possible to replace a failed module without disturbing the field wiring, other I/O modules, or system power.
  
• Terminal Base. Each 1794 FLEX I/O module requires a terminal base that snaps onto the DIN rail to the right of the I/O adapter. The terminal bases provide terminal connection points for I/O wiring and plug together to form the backplane. Available with screw or spring terminations.
  
• Accessories. Choose products such as extender cables or the panel mount kit to provide added application flexibility.
  
• Power Supply. Two 120V-AC-to-24V-DC power supplies are available for powering the adapter/power-supply.
  

Communication

A FLEX I/O adapter module interfaces FLEX I/O modules to an I/O scanner port across a communication network. The FLEX I/O adapter module contains a built-in power supply that converts 24V DC to 5V DC for the backplane to power the FLEX I/O modules. FLEX I/O adapter modules are available for EtherNet/IP, ControlNet (single media or redundant), DeviceNet, Universal Remote I/O, PROFIBUS DP, and other networks (through our Encompass Referenced Products program).