The SB 1231 RTD signal board permits temperature recording with high precision using resistance temperature detectors. The SB 1231 RTD signal board can be used with SIMATIC S7-1200 CPUs. The SB 1231 RTD signal board can be plugged directly into all SIMATIC S7-1200 CPUs.

This provides users with the following advantages:

• Optimal adaptation:
  With signal boards, users can optimally adapt their controllers even to more complex tasks.
• Flexibility:
  If the task is expanded subsequently, the controller can be upgraded. Updating of the user program is extremely simple.
• Use where space is limited:
  The signal boards are directly plugged into the CPU, enabling the controller to be expanded without taking up any additional space.