Overview
The 6ES7455-1VS00-0AE0 is a Siemens FM 455 controller module, a dedicated analog control processor for the S7-400 platform. It provides 16 analog input channels configurable for thermocouples (types B, J, K, R, S) or RTDs (Pt 100), plus 32 analog output channels, all operating from a 24 V DC supply. The module draws 0.04 A from the backplane and dissipates 16.2 W, fitting into a single-wide 50 mm slot on the S7-400 rack. RoHS compliance is documented from 21-07-17.
Function & operation
The FM 455 operates as a closed-loop controller executing PID and temperature-control algorithms independently of the S7-400 CPU, offloading the main processor from real-time loop tasks. Its 16 input channels accept thermocouple types B, J, K, R, S or Pt 100 RTDs in 2-wire or 4-wire configurations; with thermocouples or 2-wire sensors all 16 channels are available, while Pt 100 or 4-wire connections reduce the count to 8.
Applications
The FM 455 is used in continuous process applications where multiple PID loops must run independently of the main PLC scan cycle — typical installations include multi-zone furnace control, reactor temperature profiling, extrusion barrel heating, and environmental chamber regulation. The 32 analog outputs allow simultaneous drive of valve positioners, SCR power controllers, and chart recorders from a single module. On a chemical batch skid or a plastics processing line, the FM 455 handles the thermal management while the S7-400 CPU sequences the discrete logic, safety interlocks, and HMI communication. This separation simplifies both programming and commissioning.
Lifecycle & availability
The 6ES7455-1VS00-0AE0 carries a RoHS compliance date of 21-07-17, indicating it was in production at that point. No official end-of-life notification is recorded in the available evidence; the module remains a current catalog item within the Siemens S7-400 family. Buyers should confirm lead time via RFQ, as S7-400 modules are typically built to order in smaller quantities.