Description
MS 377 — Memory Submodule
Siemens · MS 377 · 6ES5377-0AB41
Description
SIMATIC S5 377 memory submodule, long type, RAM, 128 Kbytes, used as plug-in program/data memory for S5-135U/155U CPUs.
Key specifications
Parameter | Value |
Function | RAM memory submodule, long type |
Capacity | 128 KBytes |
Compatible controllers | S5-135U, S5-155U |
Form factor | Long submodule |
Reference
Field | Value |
Manufacturer (OEM) | Siemens |
Model | MS 377 |
Part number | 6ES5377-0AB41 |
Part number (as inventoried) | 6ES5 377-0AB41 |
Category | Memory |
System family | SIMATIC S5-135U/155U |
Stores quantity | 23 |
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 via expresniopravy.cz, process-informatik.de, and besturingen.com listings as a SIMATIC S5 (not SIMADYN D) 128KB RAM memory submodule for S5-135U/155U. The inventory desc labels it 'Simadyn MEMORY SUBMODULE' but no Siemens source associates this order number with the SIMADYN D 6DD1 family — classified as SIMATIC S5 per verified part identity; the 'Simadyn' label in source desc appears to be a misattribution.
Source: Spare Parts List for Sales V7 (Bohemia Market / BM Global stores inventory). Filed in the AI HW Knowledge Base.