General Description
The T103 and T303 Control Units form the basis of a complete distributed control environment capable of continuous analogue, logic and sequence control. Evolved from the well-established range of products based on the ALIN control network, they may be used either standalone or as building blocks for larger systems while ensuring complete compatibility with existing installations.

The optional redundancy of CPU and network components combined with proven I/O integrity enables cost effective high availability solutions for process control.

Control systems are built around two main components: the T103 Unit Controller and the T303 Unit Supervisor.

The T103 Unit Controller is an enhancement of the successful T100 and T102 distributed control units. It implements all I/O and continuous analogue and logic control and is available with a powerful sequence option.

The T303 Unit Supervisor complements the T103 in systems where strategy coordination or sequencing of a number of plant subsystems is required. This architecture maps directly onto the control activity model in the S88.01 standard for Batch Control.

Both units connect to the ALIN local control network which provides both peer-to-peer communications and access for operator workstations and supervisory systems.

In addition, simplex units support MODBUS serial communications in either master or slave mode, which allows integration of foreign devices such as PLCs or connection to third party systems. A gateway is also available for integrating existing TCS S6000 units.