Siemens 6DP1308-8AA Replacement for SIMATIC S5 SINEC H1

Product Overview

Siemens 6DP1308-8AA Replacement for SIMATIC S5 SINEC H1: Seamless Transition & Legacy System Upgrade

The Siemens 6DP1308-8AA FUM308 is a SINEC H1 Ethernet interface module designed for the SIMATIC S5 programmable controller platform. As Siemens has progressively phased out the S5 product line in favor of the SIMATIC S7-300 and S7-400 series, many facilities running legacy S5-115U, S5-135U, and S5-155U controllers are now facing urgent replacement and migration challenges. TOPNLMS supplies tested, verified 6DP1308-8AA FUM308 units — both original Siemens stock and compatible upgrade paths — to help engineering teams execute controlled, low-downtime transitions.

Whether your plant is performing a like-for-like spare replacement to extend the life of an existing S5 rack, or executing a full migration to a modern SIMATIC S7 or S7-1500 architecture, this module is a critical node in your network topology. The FUM308 provides the SINEC H1 (IEEE 802.3 Ethernet) connectivity that allows the S5 CPU — such as the CPU 948, CPU 928B, or CPU 922 — to communicate with SCADA systems, HMI panels, and peer PLCs over a 10 Mbit/s coaxial or twisted-pair Ethernet backbone.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful SINEC H1 network migration or S5 rack restoration rarely involves a single module. In practice, engineers replacing the 6DP1308-8AA FUM308 are simultaneously addressing adjacent components in the same control cabinet or rack. The most common co-replacement items we supply alongside this module include the Siemens 6ES5 095-8MA02 central controller unit for S5-95U compact systems, the 6ES5 308-3UC11 interface module for IM308-C PROFIBUS-DP master configurations, and the 6ES5 700-8MA11 power supply module that feeds the S5 rack backplane.

For facilities transitioning from SINEC H1 to modern Industrial Ethernet (PROFINET), the migration path typically involves introducing a Siemens CP 343-1 or CP 443-1 communications processor on the S7 side to bridge legacy S5 network segments during phased cutover. During this transition period, the existing 6DP1308-8AA continues to serve the S5 nodes while the new S7 rack is commissioned in parallel — a proven strategy for zero-unplanned-downtime migrations in continuous-process industries.

Terminal block assemblies and signal wiring between the S5 rack and field I/O panels often require attention during a module swap. We recommend verifying the 6ES5 490-8MB11 front connector condition and the associated 6ES5 306-7LA11 power supply unit before finalizing the replacement. For plants using SIMATIC S5 with distributed I/O over ET 200 networks, the IM 318-C (6ES5 318-8MB12) interface module and associated DP/PA coupler may also require inspection or replacement as part of the same maintenance window.

If your facility is upgrading the HMI layer simultaneously, the Siemens OP7 (6AV3 607-1JC20-0AX1) operator panel communicates natively over the MPI/PROFIBUS interface and can be integrated into the modernized architecture without disrupting the S5 Ethernet segment during the transition phase.

Retrofit Guidance FAQ

Q: Can I install the 6DP1308-8AA FUM308 without modifying my existing STEP 5 program?
A: Yes. The FUM308 is a direct slot-in replacement for the original SINEC H1 interface module. Your existing STEP 5 organization blocks (OBs) and function blocks (FBs) that handle H1 communication do not require modification. Simply power down the rack, swap the module, restore power, and verify the network address configuration via the module’s DIP switches.

Q: Is the wiring compatible with my existing SINEC H1 coaxial network segment?
A: The 6DP1308-8AA uses a standard AUI port and BNC connector. If your existing network uses thin coaxial (10BASE2) or thick coaxial (10BASE5) cabling, the physical connection is identical. For twisted-pair (10BASE-T) segments, an external AUI-to-RJ45 transceiver is required — the same transceiver used with the original module.

Q: What is the physical installation space requirement?
A: The FUM308 occupies one standard S5 expansion slot (single-width module). No additional mounting hardware or DIN rail space is required. Verify that the adjacent slot is free of modules with extended front connectors that may obstruct insertion.

Q: Can this module communicate with SIMATIC S7 or S7-1500 controllers on the same network?
A: The FUM308 operates on SINEC H1 (ISO/OSI Layer 2 Ethernet), which is not natively compatible with PROFINET or S7 communication services. Cross-platform communication requires a protocol gateway or a CP module on the S7 side configured for ISO transport. This is a standard configuration in phased migration projects.

Q: How do I verify the module is functioning correctly after installation?
A: After installation, use STEP 5 with the COM ET 200 tool or the H1 network configuration software to verify the module’s MAC address and network station number. The module’s front-panel LEDs (RUN, BF, and network activity indicators) provide immediate visual confirmation of bus communication status.

Warranty Assurance

Every Siemens 6DP1308-8AA FUM308 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each module undergoes a functional verification process including power-on self-test, backplane bus communication check, and network port continuity verification. Units that do not pass inspection are not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Our after-sales response time target is 24 hours for initial acknowledgment and 72 hours for resolution proposal. We maintain buffer stock of critical S5-era modules specifically to support rapid warranty replacements without extended lead times.

For procurement teams, we can provide a test report and shipment documentation upon request. All units are shipped with ESD-protective packaging and are traceable to their inspection record. Bulk orders for MRO (Maintenance, Repair & Operations) inventory programs are supported with volume pricing and staggered delivery scheduling.

For urgent replacement inquiries or to confirm stock availability before placing an order, contact our technical sales team directly.