Model: 6ES7414-4HL04-0AB0
Product Overview
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Datasheet Preview
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Commercial Path
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Technical Dossier
The Siemens SIMATIC S7-400 is a high-performance programmable logic controller (PLC) platform engineered for demanding process automation environments. Since its introduction in the mid-1990s, the S7-400 has accumulated a substantial installed base across global heavy industry sectors including petrochemical refining, nuclear power generation, offshore oil & gas, steel production, and large-scale water treatment infrastructure. Its modular rack-based architecture, deterministic real-time processing, and redundancy-capable CPU variants have made it the reference platform for safety-instrumented systems (SIS) and distributed control system (DCS) integration at the field controller level. The 6ES7414-4HL04-0AB0 is a high-end CPU within this series, featuring 4 MB working memory, integrated PROFIBUS DP interfaces, and support for isochronous mode operation — characteristics that position it in coordinated motion and high-speed process control applications.
The S7-400 platform was launched by Siemens in 1994 as the successor to the SIMATIC S5-115U/H and S5-135U/155U families. The architecture is built around a passive backplane bus (P-bus and K-bus) that separates I/O data traffic from configuration and diagnostic communication, enabling deterministic scan cycle performance independent of module count.
Generation 1 (1994–2000): Initial CPU range included the CPU 412-1, CPU 413-2 DP, CPU 414-2 DP, and CPU 416-2 DP. These units operated on STEP 7 v3.x and supported MPI and PROFIBUS DP as primary fieldbus protocols. Memory was limited to EPROM-based load memory via memory cards.
Generation 2 (2000–2008): Introduction of the H-series (High Availability) CPUs — CPU 412-3H, CPU 414-4H, CPU 417-4H — enabling hot-standby redundancy with synchronization via fiber-optic links. This generation also introduced PROFINET IO support on select variants and expanded working memory to 16 MB on top-tier units.
Generation 3 (2008–2016): The current production generation, including the 6ES7414-4HL04-0AB0 (CPU 414-4 PN/DP), added integrated PROFINET IO interfaces, isochronous real-time (IRT) support, and web server diagnostics. STEP 7 v5.5 and TIA Portal V13+ compatibility was introduced. Flash-based load memory replaced EPROM cards.
End-of-Life Transition (2016–present): Siemens announced the migration path from S7-400 to SIMATIC S7-1500 and S7-1500H platforms. The S7-400 series entered the Classic product lifecycle phase, meaning no new hardware development but continued spare parts availability and technical support through Siemens Industry Online Support (SIOS). For installed base operators, this phase requires proactive spare parts stocking and lifecycle management planning.
CPU Modules
6ES7412-1XJ07-0AB0: CPU 412-1, 256 KB working memory, 1x MPI/DP interface, entry-level S7-400 controller.
6ES7413-2XG04-0AB0: CPU 413-2 DP, 512 KB working memory, 2x PROFIBUS DP, mid-range process controller.
6ES7414-2XK05-0AB0: CPU 414-2 DP, 1.4 MB working memory, 2x DP, standard process automation CPU.
6ES7414-3XM07-0AB0: CPU 414-3 PN/DP, 4 MB working memory, integrated PROFINET IO + 2x DP.
6ES7414-4HL04-0AB0: CPU 414-4 PN/DP, 4 MB working memory, 4x DP + 1x PN, isochronous mode, high-speed coordinated control.
6ES7416-2XN07-0AB0: CPU 416-2 DP, 5.6 MB working memory, 2x DP, high-capacity process controller.
6ES7416-3XR07-0AB0: CPU 416-3 PN/DP, 16 MB working memory, PROFINET IRT, large-scale DCS integration.
6ES7417-4XT07-0AB0: CPU 417-4 DP, 30 MB working memory, 4x DP, maximum-performance S7-400 CPU.
6ES7412-2XJ07-0AB0: CPU 412-2 DP, 512 KB working memory, 2x DP, compact redundancy-capable variant.
High-Availability (H) CPU Modules
6ES7414-4HM14-0AB0: CPU 414-4H, 4 MB working memory, hot-standby redundancy, fiber-optic sync link.
6ES7417-4HT14-0AB0: CPU 417-4H, 30 MB working memory, hot-standby redundancy, maximum HA performance.
6ES7412-5HK06-0AB0: CPU 412-5H PN/DP, 1.4 MB working memory, entry-level H-CPU with PROFINET.
Digital Input (DI) Modules
6ES7421-1BL01-0AA0: SM 421 DI 32x24VDC, 32-channel 24 V DC digital input, standard process I/O.
6ES7421-7BH01-0AB0: SM 421 DI 16x24VDC NAMUR, 16-channel NAMUR-compatible input for hazardous area sensors.
Digital Output (DO) Modules
6ES7422-1BL00-0AA0: SM 422 DO 32x24VDC/0.5A, 32-channel 24 V DC digital output, relay-free switching.
6ES7422-1FH00-0AA0: SM 422 DO 16x20-120VAC/2A, 16-channel AC output for high-voltage actuator control.
Analog Input (AI) Modules
6ES7431-1KF20-0AB0: SM 431 AI 8x16Bit, 8-channel high-resolution analog input, ±10 V / 4–20 mA.
6ES7431-7QH00-0AB0: SM 431 AI 8x RTD, 8-channel resistance thermometer input, PT100/PT1000 compatible.
Analog Output (AO) Modules
6ES7432-1HF00-0AB0: SM 432 AO 8x12Bit, 8-channel analog output, ±10 V / 4–20 mA, process valve control.
Communication & Interface Modules
6GK7443-1EX30-0XE0: CP 443-1, Industrial Ethernet CP for S7-400, TCP/IP and ISO-on-TCP communication.
6GK7443-5DX05-0XE0: CP 443-5 Extended, PROFIBUS DP master/slave CP, extended network segmentation.
Power Supply Modules
6ES7407-0DA02-0AA0: PS 407 4A, 24 V DC / 4 A regulated power supply for S7-400 rack.
6ES7407-0KA02-0AA0: PS 407 10A, 24 V DC / 10 A power supply for fully populated S7-400 racks.
S7-400 modules present specific technical challenges during incoming inspection and functional verification due to their backplane bus architecture and multi-interface CPU designs. DriveKNMS applies the following test protocol to all S7-400 units:
Visual and Mechanical Inspection: Examination of backplane connector pins (P-bus and K-bus), front connector condition, EPROM/Flash memory card slot integrity, and battery holder condition on CPU modules.
Power-On Functional Test: Each CPU module is installed in a reference S7-400 rack with known-good PS 407 power supply and IM 460/461 interface modules. Boot sequence, LED status (SF, BF, DC5V, FRCE, RUN, STOP), and STEP 7 online connectivity are verified.
PROFIBUS DP Interface Test: DP interfaces are tested as both master and slave using a reference DP network with at least two slave devices. Bus timing, error frame rate, and diagnostic response are measured.
PROFINET IO Test (PN/DP variants): PROFINET interfaces are tested for IRT and RT communication modes. MAC address verification and web server accessibility are confirmed.
Memory Integrity Test: Working memory (RAM) is tested via full write/read cycle using STEP 7 memory test routines. Load memory card read/write operations are verified.
Burn-In: CPU modules undergo a minimum 24-hour powered burn-in cycle under simulated load conditions prior to shipment approval.
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