Intelligent I/o modules

The I/O modules link the controller and the process,

for signal conversion. They receive data from sensors,

detectors, transmitters and other field devices and

issue positioning commands to the process.

They have the following tasks and characteristics:

• Input and conversion of conventional signals and signal levels

• Galvanic isolation between the process and system

• Status LEDs for inputs/outputs

• Externally-powered outputs

• Automatic fault detection, fault signaling and

temperature monitoring

• Sensor and line-break monitoring

• Short-circuit and overload-protected digital outputs

• Digital inputs protected against incorrect polarity

• Potentially isolated analog inputs

• Hot-swap capability

• No switches, jumpers or potentiometers, as all

settings are configured using the software

• Front panel connection of process signals via

screw terminals with keyed blocks, codeable

against incorrect connection

All Freelance Rack I/O modules are intelligent, i.e.

they have their own processors. Users can configure

the scan times of the I/O modules individually for

each module. The fastest scan time is  ms for binary

modules and 10/500 ms for analog modules. In case

of communication errors, the output modules switch

the outputs to configurable safety values. Where

controller redundancy is configured, the second

controller takes over without interruption.