Description
ZG 155U — Rack/Subrack
Siemens · ZG 155U · 6ES5155-3UA21
Description
The 6ES5155-3UA21 is a central controller (rack) for the SIMATIC S5-155U programmable controller, providing the backplane and slots for CPU, memory, and I/O modules in the high-end S5-135U/155U system. It is part of the Central Controller (CC) product family sharing documentation with the S5-155U CPU 946/947 manual set.
Key specifications
Parameter | Value |
Function | Central controller rack for S5-155U PLC |
System | SIMATIC S5-155U (compatible CPUs: 946, 947, 948) |
Documentation set | Order No. 6ES5 998-0UM22 (S5-155U system manual) |
Mounting/Rack | Central rack; power supply and CPU/I-O module slots (verify exact slot count on nameplate) |
Reference
Field | Value |
Manufacturer (OEM) | Siemens |
Model | ZG 155U |
Part number | 6ES5155-3UA21 |
Category | Rack/Subrack |
System family | SIMATIC S5-155U |
Stores quantity | 3 |
Data confidence | high |
Manuals filed (007 - Manuals)
- Manual CP1430 English Vol1.pdf — S5-115U system reference (CP/comms volume)
- 02 - CPU948 Programming Manual.pdf — S5 CPU programming reference (115U/155H family)
Notes
Confirmed 6ES5155-3UA21 as S5-155U central controller ("ZG 155U Zentralgeraet") per Siemens S5-155U system manual (6ES5998-0UM22) and abn.by/southernplcs.com distributor listings.
Source: Spare Parts List for Sales V7 (Bohemia Market / BM Global stores inventory). Filed in the AI HW Knowledge Base.