Key takeaways
- We have 34 S5 order numbers in stock right now. Siemens' S5 to S7 cross-reference table maps 5 of them to an S7 order number; Siemens' S5 to S7-1500 guide lists an S7-1500 CPU or module against 5 of them. The other 28 have no S7 order number in either of Siemens' tables, and we name no successor for them.
- Siemens' S5 to S7 chart is from 2007: the S7 numbers it proposes may themselves be discontinued now, so check each one with Siemens before you order.
- No status is shown for any single order number: everything here is family-level, from the Siemens documents listed at the end, each with its page.
- The stock columns are live: what we have on the shelf now, at the price you pay.
What this page covers, and what it doesn't. Everything below comes from the 2 Siemens sources listed at the end, read on October 17, 2026, each statement with its page. These are statements about the S5 family as a whole: we show no lifecycle status for any single order number. Where a Siemens table lists an exact order number, we show what that table maps it to, with the table and page; that is Siemens' suggestion for a migration, for reference only, not a status and not a drop-in swap. Every other order number is marked “not in Siemens' cross-reference table”: we don't name a successor of our own.
Is the SIMATIC S5 still made?
- According to Siemens' S5 to S7-1500 migration guide (April 2015), Siemens stopped making SIMATIC S5 hardware in 2003. (Siemens S5 to S7-1500 migration guide 105106251, p. 15)
- In 2015 Siemens could still supply most S5 parts as spares, the guide says, but only in exchange for the old part, and with stocks shrinking. (Siemens S5 to S7-1500 migration guide 105106251, p. 15)
- For the phase-out of S5 products and for spare parts after their discontinuation dates, the guide refers you to your regional Siemens contact. (Siemens S5 to S7-1500 migration guide 105106251, p. 15)
- The guide adds that the risk for old plants keeps rising because spare parts are hard to get and qualified service engineers are fewer. (Siemens S5 to S7-1500 migration guide 105106251, p. 9)
Siemens' migration path
- Siemens' S5 to S7 product number chart (V1.0, 2007) proposes an S7 target system for each S5 system: S7-300 for the small S5 controllers, S7-300 or S7-400 for the S5-115U and S5-135U, and S7-400 for the S5-155U (the table below). (Siemens S5 to S7 product number chart, p. 2)
- The 2015 guide is written for moving S5 plants to the newer S7-1500 with TIA Portal. (Siemens S5 to S7-1500 migration guide 105106251, p. 5)
- Its appendix compares S5 CPUs with recommended S7-1500 CPUs, as a rough guide only: memory, speed, interfaces and how hard the old CPU is working decide the choice. (Siemens S5 to S7-1500 migration guide 105106251, p. 16)
- Siemens marks its comparison tables as for reference only: a listed S7-1500 module is not automatically an equivalent, so check supply, signal voltage, channels and load against your plant. (Siemens S5 to S7-1500 migration guide 105106251, p. 38)
- Siemens' I/O adapters let the existing S5 front connectors plug onto new S7-300, S7-400 or S7-1500 I/O, so the field wiring can stay as it is. (Siemens S5 to S7-1500 migration guide 105106251, p. 17)
- An S5 central controller with expansion units is replaced by one S7-1500 station plus ET 200MP stations on PROFINET, with the same I/O adapters. (Siemens S5 to S7-1500 migration guide 105106251, p. 18)
- For S5 distributed I/O, the guide recommends moving ET 100 stations to PROFINET or PROFIBUS with ET 200SP or ET 200MP, and lets ET 200U / ET 200B stations stay on PROFIBUS behind an S7-1500 in a partial migration. (Siemens S5 to S7-1500 migration guide 105106251, p. 19)
S5 order numbers in our stock, with Siemens' cross-reference
Every SIMATIC S5 order number we have on the shelf now. For each one: what Siemens' S5 to S7 product number chart maps it to (V1.0, dated 06/11/07: S7-300 / S7-400 CPUs on page 1, S7-300 / ET 200M I/O on page 5) and the S7-1500 CPU or module Siemens' S5 to S7-1500 guide lists against it (CPUs: Tables 7-1 to 7-3, page 39; I/O, communication and special modules: Tables 7-4 to 7-9, pages 40–48, all marked for reference only). Siemens' numbers are shown exactly as printed. “We stock it” next to one of them means we have that part on our shelves; it says nothing about Siemens' availability.
Siemens' chart is from 2007 (V1.0, dated 06/11/07). The S7 order numbers it names are its proposals from then and may themselves be discontinued now: check each one with Siemens before you order. Oddities in the chart are shown as printed.
| Order number | Product (our listing) | Siemens' S5 to S7 cross-reference table | Siemens' S5 to S7-1500 guide | In our stock |
|---|---|---|---|---|
6ES5 241-1AA11 | Siemens 6ES5241-1AA11 SIMATIC S5 IP241 Digital Position Module PLC Industrial | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $63.89 |
6ES5 300-3AB11 | Siemens 6ES5300-3AB11 C79040-A92-C218-5-87 | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $25.00 |
6ES5 300-5LB11 | Siemens 6ES5 300-5LB11 Simatic S5 IM300 Interface Module PLC EU Connection Card | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $18.89 |
6ES5 304-3UB11 | Siemens Simatic 6ES5304-3UB11 | Not in Siemens' cross-reference table | Not in the guide's tables | 14 in stockfrom $20.00 |
6ES5 308-3UB11 | Siemens 6ES5308-3UB11 | Not in Siemens' cross-reference table | Not in the guide's tables | 15 in stockfrom $33.99 |
6ES5 308-3UC11 | Siemens 6ES5 308-3UC11 SINEC L2-DP Simatic S5 Interface Module + 374-1KH21 Flash | Not in Siemens' cross-reference table | Not in the guide's tables | 7 in stockfrom $56.89 |
6ES5 308-3UC21 | Siemens 6ES5 308-3UC21 Simatic InteRFACE MODULE 6ES5-374-1KH21 MEMORY CARD | Not in Siemens' cross-reference table | Not in the guide's tables | 3 in stockfrom $149.00 |
6ES5 318-8MA12 | Siemens Simatic 6ES5 318-8MA12 Interface Module S5 PLC Industrial Automation | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $31.89 |
6ES5 324-3UR11 | Siemens Simatic 6ES5324-3UR11 | Not in Siemens' cross-reference table | Not in the guide's tables | 6 in stockfrom $32.99 |
6ES5 420-7LA11 | SIEMENS SIMATIC SS 6ES5 420-7LA11.. lot of 2 | Maps |
Lists 6ES7 521-1BL00-0AB0 (32 DI, 24V DC, HF, 35mm) or 6ES7 521-1BL10-0AA0 (DI 32x24VDC, BA, 25mm)For the 25 mm module, the guide's footnote says the 25 mm modules have no parameter settings or diagnostics, and that Siemens had no S7-1500 I/O adapters for them at the time.Table 7-4, Siemens S5 to S7-1500 migration guide 105106251, p. 40 |
3 in stockfrom $33.99 |
6ES5 431-8MA11 | Siemens 6ES5 431-8MA11 SIMATIC S5 Input Module 8-Point 24VDC PLC Industrial OEM | Not in Siemens' cross-reference table | Not in the guide's tables | 31 in stockfrom $12.89 |
6ES5 441-7LA12 | Siemens 6ES5441-7LA12 Simatic | Maps |
Not in the guide's tables | 1 in stockfrom $44.00 |
6ES5 451-5AA13 | Siemens Simatic 6ES5451-5AA13 | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $36.99 |
6ES5 464-8MF11 | Siemens 6ES5 464-8MF11 SIMATIC S5 8-Channel Analog Input Module PLC Industrial | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $30.89 |
6ES5 465-7LA13 | Siemens 6ES5 465-7LA13 Simatic S5 Analog Input Module 16/8 Channel Industrial | Maps |
Lists 6ES7 531-7KF00-0AB (AI 8xU/I/R/RTD/TC ST) (as printed: the number is cut off)Table 7-6, Siemens S5 to S7-1500 migration guide 105106251, p. 44
|
2 in stockfrom $49.89 |
6ES5 470-4UB12 | Siemens 6ES5470-4UB12 Simatic S5 Analog Output Module AO470 PLC Card Floating | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $33.89 |
6ES5 482-4UA11 | Siemens 6ES5482-4UA11 Simatic S5 Digital Input Output Module I/O PLC DIO482 | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $66.89 |
6ES5 521-8MA11 | Siemens 6ES5521-8MA11 6ES5 521-8MA11 | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $55.89 |
6ES5 524-3UA13 | Siemens 6ES5 524-3UA13 Simatic S5 CP524 Communication Processor PLC Module Card | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $30.00 |
6ES5 524-3UA15 | Siemens 6ES5 524-3UA15 491-0LB11 Simatic S5 CP 524 Communication Processor PLC | Not in Siemens' cross-reference table | Lists 6ES7 540-1AB00-0AA0 (CM PtP RS422/485)Table 7-8, Siemens S5 to S7-1500 migration guide 105106251, p. 46
|
1 in stockfrom $74.89 |
6ES5700-1LA1 | Siemens 6ES5700-1LA1 SIMATIC S5 CR1 Central Controller 7-Slot Card Rack Module | Not in Siemens' cross-reference table | Not in the guide's tables | 2 in stockfrom $11.89 |
6ES5 700-1LA11 | Siemens 6ES5 700-1LA11 Simatic S5 Subrack CR1 Backplane Mounting Rack 8 Slot PLC | Not in Siemens' cross-reference table | Not in the guide's tables | 3 in stockfrom $69.89 |
6ES5 700-8MA11 | Siemens Simatics Bus Module 6ES5 700-8MA11 | Not in Siemens' cross-reference table | Not in the guide's tables | 3 in stockfrom $10.00 |
6ES5 752-0AA22 | Siemens 6ES5752-0AA22 Interface Submodule CP 524 CPU 928B E-Stand 02 Used | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $26.89 |
6ES5 925-3KA12 | Siemens 6ES5925-3KA12 Circuit Board | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $59.99 |
6ES5 926-3KA12 | Siemens 6ES5926-3KA12 Simatic S5 CPU926 Processor Module Industrial PLC OEM | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $63.89 |
6ES5 927-3KA13 | Siemens 6ES59273KA13 Circuit Board | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $59.99 |
6ES5 928-3UB11 | Siemens 6ES5928-3UB11 Simatic S5 CPU928 Processor Module Card PLC Automation OEM | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $45.00 |
6ES5 941-7UA11 | Siemens 6ES5 941-7UA11 SIMATIC S5 Central Processing Unit CPU PLC Automation OEM | Maps |
Lists 6ES7 513-1AL00-0AB0 (CPU 1513-1 PN)Table 7-1, Siemens S5 to S7-1500 migration guide 105106251, p. 39
|
8 in stockfrom $101.89 |
6ES5 943-7UB11 | Siemens 6ES5 943-7UB11 Simatic S5 CPU 943B Central Processing Unit Industrial | Maps |
Lists 6ES7 513-1AL00-0AB0 (CPU 1513-1 PN)Table 7-1, Siemens S5 to S7-1500 migration guide 105106251, p. 39
|
1 in stockfrom $61.89 |
6ES5 948-3UR23 | Siemens Simatic 6ES5948-3UR23 | Not in Siemens' cross-reference table | Not in the guide's tables | 15 in stockfrom $319.99 |
6ES5 951-7ND12 | Siemens 6ES5951-7ND12 Simatic S5 Power Supply Module Industrial PLC Controller | Not in Siemens' cross-reference table | Not in the guide's tables | 2 in stockfrom $57.89 |
6ES5 955-7NC11 | Siemens Simatic 6ES5-955-7NC11 Power Supply Module | Not in Siemens' cross-reference table | Not in the guide's tables | 24 in stockfrom $59.99 |
6ES5 981-0HB11 | Siemens 6ES5 981-0HB11 | Not in Siemens' cross-reference table | Not in the guide's tables | 1 in stockfrom $510.00 |
S5 system to S7 system
Siemens' chart proposes these target systems (Siemens S5 to S7 product number chart, p. 2):
| Existing S5 system | Target S7 system |
|---|---|
| S5-010 W | S7-300 |
| S5-101U/R | S7-300 |
| S5-105R | S7-300 |
| S5-110A | S7-300 |
| S5-110S | S7-300 / S7-400 |
| S5-090U | S7-300 |
| S5-095U | S7-300 |
| S5-095/110/115F | S7-315F |
| S5-100U | S7-300 |
| S5-115U | S7-300 / S7-400 |
| S5-135U | S7-300 / S7-400 |
| S5-155U | S7-400 |
| S5-130A/K/WB | S7-300 / S7-400 |
| S5-150A/K/S/U | S7-400 |
S5 function cards to S7 modules (by type)
For IP, CP and IM cards the chart maps module types, not order numbers (Siemens S5 to S7 product number chart, p. 4):
| Existing S5 card | Target S7 module |
|---|---|
| IP240 | FM350 FM450 |
| IP241 | FM352 FM452 |
| IP242 | FM350 FM450 |
| IP243 | SM331 SM431 |
| IP244 | FM355 FM455 |
| IP245 | FM354 FM453 |
| IP246 | FM354 FM453 |
| IP247 | FM353 FM453 |
| IP252 | FM355 FM455 |
| CP523 CP524 | CP340 CP440 |
| CP526 CP527 CP528 | OP270 |
| CP530 | CP342-5 CP443-5 |
| CP5430 CP5431 | CP342-5 CP443-5 |
| CP535 | CP343-1 CP443-1 |
| CP143 CP1430 | CP343-1 CP443-1 |
| CP1473 MAP | CP444 |
| IM308 IM318 | S7 |
Sources (read October 17, 2026; page numbers are the ones printed on each page):
- Migration SIMATIC S5 to SIMATIC S7: hardware migration options (product number chart) – Siemens, V1.0, dated 06/11/07 (PDF, 5 pages)
- Guide for Migrating SIMATIC S5 Projects to SIMATIC S7-1500 and TIA Portal – Siemens, V1.0, April 2015 (PDF, 49 pages)
Siemens updates its documents: check the current edition, and the details of your plant, before you order or plan a migration.
Keep it running or migrate?
Many plants do both: spares for the S5 systems that must keep running, and a dated plan to move off the platform at planned shutdowns. Every unit we stock is photographed; check the order number and product version on the label before you buy.
Safety first: switch off and lock out the rack's supply and any separately powered I/O before you change a SIMATIC module, following Siemens' instructions and your site's lockout/tagout procedure. Field wiring can be live from other sources even when the PLC is off – verify before you touch it.
Frequently asked questions
Is SIMATIC S5 still made?
No: Siemens' 2015 S5 migration guide puts the end of S5 production in 2003. In 2015 Siemens could still supply most S5 parts as spares, the guide says, but only in exchange for the old part, and with stocks shrinking. For the phase-out of S5 products and for spare parts after their discontinuation dates, the guide refers you to your regional Siemens contact. (Siemens S5 to S7-1500 migration guide 105106251, p. 15)
What replaces a SIMATIC S5 CPU?
Siemens' S5 to S7 cross-reference table (2007) maps most of the S5 CPU order numbers it lists to an S7-300 or S7-400 CPU – for example, it maps 6ES5 941-7UA11 to 6ES7 315-2AG10-0AB0 (Siemens S5 to S7 product number chart, p. 1). Siemens' S5 to S7-1500 migration guide lists S7-1500 CPUs against the S5-115U, S5-135U and S5-155U CPUs – for example 6ES7 513-1AL00-0AB0 (CPU 1513-1 PN) against the 6ES5 941-7UA11 (Table 7-1, Siemens S5 to S7-1500 migration guide 105106251, p. 39). The guide calls its tables a rough guide and for reference only (Siemens S5 to S7-1500 migration guide 105106251, p. 16; Siemens S5 to S7-1500 migration guide 105106251, p. 38).
Which S7 system replaces my S5 system?
Siemens' S5 to S7 chart proposes S7-300 for the S5-010 W, S5-101U/R, S5-105R, S5-110A, S5-090U, S5-095U and S5-100U; S7-300 or S7-400 for the S5-110S, S5-115U, S5-135U and S5-130A/K/WB; S7-315F for the S5-095/110/115F; S7-400 for the S5-155U and S5-150A/K/S/U (Siemens S5 to S7 product number chart, p. 2). Its 2015 guide covers the move to the newer S7-1500 (Siemens S5 to S7-1500 migration guide 105106251, p. 5).
Do I have to rewire the S5 I/O?
Not necessarily. Siemens' I/O adapters let the existing S5 front connectors plug onto new S7-300, S7-400 or S7-1500 I/O, so the field wiring can stay as it is. (Siemens S5 to S7-1500 migration guide 105106251, p. 17)
Can I still buy SIMATIC S5 parts?
We stock surplus and used units – the tables show what is on our shelves now – and source the ones we don't have: send the order numbers through the quote form. Purchase orders are welcome; payment is due before we ship.