The FM 355 is an intelligent 4-channel controller module for universal control tasks. It can be used to control temperature, pressure and flow.

The following versions of the FM 355 are available:

• FM 355 C
  Continuous-action controller with 4 analog outputs for controlling analog actuators
• FM 355 S
  Step or pulse controller with 8 digital outputs for controlling motor-driven (integrating) actuators or binary controlled actuators (e.g. electrical heating strips and cartridges)
• FM 355-2 C/S
  Specially optimized for temperature controls with user-friendly online self-optimization integrated