Description

The 6ES7417-5HT06-0AB0​ is the Siemens SIMATIC S7-400H series top-end central processing unit — the CPU 417-5H PN/DP​ — engineered for high-availability (H) and safety (F/FH) applications where a single-CPU architecture is simply not an option. Manufactured by Siemens AG, this module carries 32 MB of integrated work memory (16 MB program + 16 MB data), executes bit operations in 7.5 ns​ and floating-point in 15 ns, and presents five onboard interfaces: 1× MPI/DP combo, 1× standalone DP, 1× PROFINET PN (dual-port switch built in), and 2× slots for fiber sync modules that link a redundant CPU partner. It lives in an S7-400H rack (UR2-H or CR2-H) alongside a sibling 6ES7417-5HT06-0AB0, and the pair run lockstep via fiber so that if the master fails, the standby takes over with zero process interruption — the defining promise of the S7-400H architecture.

 

Application Scenarios

A 1 000 MW supercritical coal unit in Northern China runs its boiler protection and burner-management logic on a redundant S7-400H pair — originally commissioned in 2011 with 6ES7417-4HT02-0AB0​ (the older -4H generation, no PN port). In 2022 the plant added a flue-gas desulfurization retrofit that needed PROFINET IO to talk to the new scrubber’s ET 200SP islands, but the original -4H had no PN interface; adding an external CP443-1 ate a rack slot and introduced a single point of failure on the PN path. The integrator swapped both CPUs for 6ES7417-5HT06-0AB0​ — pin-compatible, same 50 mm width, same backplane current draw (1.6 A @ 5 V typ.), and crucially the 6ES7417-5HT06-0AB0​ has PN native on the CPU faceplate. The existing sync fiber cables (6ES7960-1AA06-5BA0) clicked straight into the two sync slots, the FEPROM memory card移植 without recompile, and the plant kept its S7-400H rack, its I/O modules (SM 421/431/432), and its PCS 7 OS server sessions — the only change the DCS operator saw was “CPU_1” and “CPU_2” both reporting “PN Link OK” in the chassis view. The pain point solved: “H-redundancy + new PN IO without abandoning a 14-year-old rack.” That’s exactly who buys the 6ES7417-5HT06-0AB0​ today — plants with a working UR2-H that just needs the CPU layer refreshed.

 

Parameter

Main Parameters	Value/Description
Product Model​	6ES7417-5HT06-0AB0​
Manufacturer​	Siemens AG
Product Category​	S7-400H Central Processing Unit (H / F / FH capable)
Work Memory​	32 MB total (16 MB program + 16 MB data), non-expandable
Load Memory​	Expandable via FLASH memory card (FEPROM, max 64 MB)
Execution Time​	7.5 ns (bit/word/fixed-point), 15 ns (floating-point)
Interfaces​	1× MPI/DP, 1× DP, 1× PN (dual-port switch), 2× sync module slots
CiR Synchronization (basic)​	60 ms (Configuration-in-RUN)
Backplane Current​	1.6 A typ. / 1.9 A max @ 5 V DC; 150 mA max @ 24 V DC per DP
Power Loss​	~7.5 W typ.
Battery Backup​	Yes, 180 µA typ. (valid to 40 °C), external 5–15 V backup voltage possible
Firmware​	V6.0
Safety Upgrade​	S7-400F/FH capable with F-Runtime license
Dimensions (W×H×D)​	50 × 290 × 219 mm
Weight​	~1.28 kg
Lifecycle​	PM300 Active (S7-400 platform overall trending toward PM410)

 

Technical Principles and Innovative Values

• Innovation Point 1: Fiber-Lockstep H-Sync in 50 mm.​ The 6ES7417-5HT06-0AB0​ dedicates two of its five interfaces exclusively to sync modules (6ES7960 series fiber pairs). Master and standby exchange the entire process image + I/O update + timer states every scan; if Master loses power or throws a CPU fault, Standby transitions in <<100 ms — PCS 7 OS doesn’t even log an “operator action,” just a “redundancy switch” event. That’s the S7-400H value prop, and the 6ES7417-5HT06-0AB0​ is the fastest CPU that still carries it.
• Innovation Point 2: PN Port Natively on the CPU.​ The “-5HT06” suffix vs. the older “-4HT02” is the PN addition — the 6ES7417-5HT06-0AB0​ has a dual-port 100 Mbps switch onboard, so you can land PROFINET IO devices (ET 200SP, ET 200MP, PROFINET drives) straight on the CPU without a CP443-1 eating a rack slot. For brownfield S7-400H racks that were DP-only in 2005 but need PN today, this is the migration path that keeps the rack.
• Innovation Point 3: F/FH Ladder Through License, Not Hardware.​ The 6ES7417-5HT06-0AB0​ silicon is identical for standard H and safety — adding an F-Runtime license + F-System block package turns it into an S7-400FH (Failsafe H) up to SIL 3 / PL e / AK6. No hardware swap needed. For plants that originally bought H “just for availability” and later got a safety audit demanding SIF loops on the same rack, the 6ES7417-5HT06-0AB0​ absorbs that without a rack rebuild.

 

Application Cases and Industry Value

Case 1 – Ethylene Cracker SIS Bypass (SEA Petchem):​ A naphtha-fed cracker runs its emergency-shutdown (ESD) Level 1 logic on S7-400FH — two 6ES7417-5HT06-0AB0​ in a UR2-H, each talking to ~1 200 F-DI and ~400 F-DO across three ET 200M F-racks on Profibus PA. The plant did a turbo-expander retrofit that added 180 new analog loops (vibration / bearing temp / seal gas). The 6ES7417-5HT06-0AB0​ 32 MB work memory had headroom — 16 MB data wasn’t even 60 % full — so the new loops landed on an IM 153-4 PN (hooked to the CPUs’ PN ports) without bumping memory. Post-retrofit audit: “The 6ES7417-5HT06-0AB0​ took the extra 180 AI + 45 AO in STRUC_L comp, F-cyclic still 38 ms end-to-end. Didn’t touch the H-sync timing.” The alternative — migrating to S7-1500R+H — was quoted at €340 k including PCS 7 OS redeploy; the CPU-refresh + IM 153-4 PN route cost €47 k.Case 2 – Metro Depot Signaling (EU, Rail):​ A depot control system for a 15 km light-rail line uses S7-400H for the point-machine interlock and platform-screen-door coordination. Original CPUs were 416-5H; after a timetable densification added 40 more point machines, the 16 MB / 6 MB program/data ceiling on the 416 started forcing FC/FB compaction. Swapping to 6ES7417-5HT06-0AB0​ (32 MB / 16+16) removed the ceiling — the same STEP 7 V5.5 SP4 project recompiled without a single net change, just “Change Module Type” in HW Config. Signal engineer comment: “The 6ES7417-5HT06-0AB0​ gave us the headroom without touching a single interlocking net. That’s the upgrade you want at 2 a.m.”