Features:
- The CPU coordinates redundant S7-400H and fail-safe S7-400F/FH control tasks.
- Two pluggable fiber-optic synchronization paths couple the redundant processor pair.
- MPI/PROFIBUS DP connects engineering stations and distributed I/O independently of CPU synchronization.
Siemens 6ES7412-3HJ14-0AB0 executes the configured program while exchanging redundancy state through its synchronization hardware.
The work-memory split of 6ES7412-3HJ14-0AB0 reserves separate integrated areas for program code and process data.
Rack and fieldbus resources on 6ES7412-3HJ14-0AB0 connect the processor to expansion units and distributed DP devices.
The Siemens 6ES7412-3HJ14-0AB0 CPU 412-3H Redundant Central Processing Unit may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7412-3HJ14-0AB0 CPU 412-3H Redundant Central Processing Unit Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Processor Synchronization Path
- CPU partner: A matched S7-400H processor forms the second side of the redundant controller pair.
- Sync positions: Two pluggable optical submodules provide the documented synchronization channels.
- Traffic separation: Redundancy state uses the sync links instead of the MPI/PROFIBUS DP fieldbus.
- Replacement boundary: Hardware version, firmware, optical submodules, and project settings must be checked together.
Program, Data and Load Storage
- Program area: 512 KB of integrated work memory is assigned to program execution.
- Data area: 256 KB of integrated work memory holds the configured data portion.
- Load medium: A supported plug-in memory card carries the load memory up to the documented capacity.
- Backup relation: Battery-backed and card-based storage roles depend on the configured S7-400 rack supply.
Engineering and Distributed I/O
- Integrated interface: The isolated RS485 connection operates as MPI or PROFIBUS DP.
- DP master role: The CPU can coordinate the documented group of PROFIBUS slave stations.
- Data rate: The fieldbus supports configured rates up to 12 Mbit/s.
- Power output: The interface provides the documented 5 V DC service supply within its current limit.
Central Rack and Expansion Layout
- Slot demand: The processor occupies two S7-400 rack slots.
- Backplane supply: The system power supply feeds the CPU through the rack backplane.
- Expansion path: Interface modules connect the central rack to the documented number of expansion units.
- Diagnostics: The buffer records CPU, redundancy, and communication events for STEP 7 analysis.