SIMATIC S7-400 – CPU 414-3 Central processing unit with: Work memory 4 MB – (2 MB code – 2 MB data) – 1st interface MPI/DP 12 Mbit/s – 2nd interface PROFIBUS DP – 3rd interface plug-in IFM module

SIMATIC S7-400H – CPU 414H central processing unit for S7-400H and S7-400F/FH – 4 interfaces: 1 MPI/DP – 1 DP and 2 for sync modules – 768 KB memory (384 KB data/384 KB program)

SIMATIC S7-400H – CPU 414-4H PG CENTRAL UNIT FOR S7-400H 4 INTERFACES: 1 MPI/DP – 1 DP A. 2 FOR SYNC MODULES 12 MB MEMORY (2 MB CODE/10 MB DATA) FOR ENERGY SECTOR CUSTOMERS ONLY – we can load firmware version: V4.5.0 / V4.5.1 / V4.5.2 / V4.5.3 / V4.5.4 / V4.5.5 / V4.5.6NC CABLE FO 1 M

SIMATIC S7-400H – CPU 414-5H – CENTRAL UNIT FOR S7-400H AND S7-400F/FH – 5 INTERFACES: 1X MPI/DP – 1X DP – 1X PN AND 2 FOR SYNC MODULES 4 MB MEMORY (2 MB DATA/2 MB CODE) – we can load firmware version: V6.0.1 / V6.0.2 / V6.0.3