What systems is this module compatible with?
S5-115U, S5-135U, and S5-155U SIMATIC S5 controllers
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Siemens
6ES5308-3UC21
SIMATIC S5 IM308-C PROFIBUS DP Master Interface, for S5-115U/135U/155U
Siemens
From $608.2In stockDiscontinued
- GTIN
- 4025515066439
Product Description
The 6ES5308-3UC21 is the SIMATIC S5 IM308-C interface module providing a PROFIBUS DP master connection for S5-115U, S5-135U, and S5-155U controllers. Designed for industrial communication within S5 systems, the IM308-C enables deterministic fieldbus control of DP slaves and integrates seamlessly with existing S5 racks. Note that only 5 V memory cards are programmable in the IM308-C, which is critical for service and configuration workflows in legacy installations. This module is suitable for technicians maintaining or expanding S5-based plants where PROFIBUS DP master capability is required to link remote I/O and devices. The unit operates as the bus master, handling cyclic data exchange and diagnostics over PROFIBUS DP, and is commonly deployed in modernization and lifecycle extension projects. Package contents typically include the interface module; cabling, memory cards, and accessories are not included and must be sourced separately. Ensure compatibility with the target S5 CPU family and existing PROFIBUS topology before commissioning.
Key Features
- •PROFIBUS DP master interface for S5 systems, Compatible with S5-115U S5-135U S5-155U, IM308-C connection module for SIMATIC S5, Supports only 5 V programmable memory cards, Enables deterministic DP slave communication, Intended for legacy S5 modernization
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $900.58
Availability: 25 in stock
Lead time: Ships from stock
Never Used
Price: $675.78
Availability: 6 in stock
Lead time: Ships from stock
Used
Price: $608.2
Availability: 86 in stock
Lead time: Ships from stock
Specifications
- Model number
- 6ES5308-3UC21
- Series
- SIMATIC S5 IM308-C
- Function
- PROFIBUS DP master interface for S5-115U/135U/155U
- Memory card support
- Only 5 V memory cards programmable
- GTIN-13
- 4025515066439
- HS/Commodity code
- 85176200
- Part #
- 6ES5308-3UC21
- Category
- PLCs/Machine Control
- Subcategory
- PLC Module/Rack
- Weight
- 0.84 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
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Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
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FAQ
Does this module act as a PROFIBUS master or slave?
It provides a PROFIBUS DP master connection
Which memory cards are supported for programming?
Only 5 V memory cards are programmable in the IM308-C
Is cabling or accessories included?
Typically only the interface module is included; accessories must be sourced separately
Can this be used for modernizing legacy S5 installations?
Yes, it enables DP master communication to integrate DP slaves in S5 systems