They have a modular hardware construction which accepts up to three plug-in Input/Output modules and two interface modules to satisfy a wide range of control requirements. Two digital inputs and an optional alarm relay are included as part of the fixed hardware build. The instruments are available as:

  • standard controllers - which include a basic 8-segment programmer Models 2408/CC and 2404/CC
  • setpoint programming controllers: Models 2408/CP, P4, CM and 2404/CP, P4, CM
  • motorized valve controllers - which include a basic 8-segment programmer Models 2408/VC and 2404/VC
  • setpoint programming motorized valve controllers: Models 2408/VP, V4, VM and 2404/VP, V4, VM

Before proceeding, please read the Safety and EMC Information as follows:

This controller complies with the European Low Voltage Directive 2006/95/EC, by the application of the safety standard EN 61010.  It is intended for industrial temperature and process control applications when it will meet the requirements of the European Directives on Safety and EMC. Use in other applications, or failure to observe the installation instructions of this handbook may impair the safety or EMC protection provided by the controller. It is the responsibility of the installer to ensure the safety and EMC of any particular installation.

The labels on the sides of the controller identify the ordering code, the serial number, and the wiring connections.

Understanding the Ordering Code
The 2408 and 2404 controllers have a modular hardware construction, which accepts up to three plug-in Input/Output modules and two communications modules to satisfy a wide range of control requirements. Two digital inputs and an optional alarm relay form part of the fixed hardware build. The ordering code is in two parts. The hardware coding and an optional configuration coding. The hardware coding specifies the basic build of the controller and the plug-in modules that are fitted