Description
DO 451-4 — Digital Output Module
Siemens · DO 451-4 · 6ES5451-4UA14
Description
The DO 451-4 (6ES5451-4UA14) is a floating (galvanically isolated) digital output module, compact version U, for the SIMATIC S5-135U/155U programmable controller, providing 32 digital outputs at 24V DC with 0.5A per channel; successor revision to 6ES5451-4UA13.
Key specifications
Parameter | Value |
Function | Digital output module for S5-135U/155U |
Channels | 32 digital outputs |
Output rating | 24 V DC, 0.5 A per channel |
Isolation | Floating (galvanically isolated) |
Form factor | Compact version U; can be used in S5-115U with adaptor casing 6ES5491-0LB11 |
Reference
Field | Value |
Manufacturer (OEM) | Siemens |
Model | DO 451-4 |
Part number | 6ES5451-4UA14 |
Category | Digital I/O |
System family | SIMATIC S5-135U/155U |
Stores quantity | 4 |
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
Verified via adegis.com and sps-service.eu datasheets confirming DO 451-4UA14 = 32x24VDC/0.5A floating output module, successor to -4UA13.
Source: Spare Parts List for Sales V7 (Bohemia Market / BM Global stores inventory). Filed in the AI HW Knowledge Base.