The FM 355 closed-loop control module is the intelligent 4-channel closed-loop control module for universal closed-loop control tasks.

It may be used for

• Temperature control
• Pressure control
• Flow control
• Level control

in the following areas:

• General mechanical engineering
• Plant building
• Industrial furnaces
• Cooling and heating equipment
• Food and drinks industry
• Rubber and plastics machines
• Chemical and process industries
• Glass and ceramics
• Wood and paper industry

The FM 355 is available in two versions:

• FM 355 C as continuous controller with 4 analog outputs for controlling analog actuators
• FM 355 S as step or pulse controller with 8 digital outputs for controlling motorized (integrating) actuators or binary-controlled actuators (e.g., electrical strip heaters and tube heaters)

The FM 355 can be used in SIMATIC S7-300 and ET 200M with S7-300/400 as a DP master.