Siemens 6SE7027-2ED84-1HF5 Replacement for MASTERDRIVES MC

Product Overview

Siemens 6SE7027-2ED84-1HF5 Replacement for MASTERDRIVES MC: Seamless Transition & Legacy System Upgrade

The Siemens 6SE7027-2ED84-1HF5 is a Vector Control Unit (VCU) belonging to the SIMOVERT MASTERDRIVES MC (Motion Control) series — a high-performance AC drive platform widely deployed across industrial automation systems in manufacturing, material handling, paper mills, metal processing, and crane applications. As Siemens progressively phases out the MASTERDRIVES MC product line in favor of the SINAMICS S120 platform, many facilities operating legacy drive cabinets face the critical challenge of sourcing verified replacement units or planning a structured migration path that minimizes production downtime.

TOPNLMS maintains verified stock of the 6SE7027-2ED84-1HF5 to support both direct drop-in replacement and phased upgrade scenarios. Whether your priority is an immediate like-for-like swap to restore production, or a longer-term migration to a modern drive architecture, this page provides the technical and procurement information you need to make a confident decision.

Compatibility Comparison Table

Seamless Upgrade Solutions

Replacing or upgrading a 6SE7027-2ED84-1HF5 rarely involves the control unit alone. In practice, a successful migration or drop-in replacement requires careful attention to the surrounding system components. The following describes the typical upgrade ecosystem encountered in MASTERDRIVES MC installations.

For facilities performing a direct replacement, the existing MASTERDRIVES MC Power Section (matched to the 27 kW rating) remains in service, and the 6SE7027-2ED84-1HF5 control unit slots back into the same chassis. The CBP2 PROFIBUS communication board — already installed in most networked MASTERDRIVES MC units — is retained and re-parameterized using DriveMonitor. Encoder feedback wiring connected to the SBP or SBR speed encoder board does not require modification, preserving the existing HTL/TTL signal chain to the motor.

For facilities planning a phased migration to SINAMICS S120, the upgrade path typically begins with the SINAMICS S120 CU320-2 DP Control Unit, paired with a booksize or chassis Motor Module sized to the existing motor load. The SMC30 Sensor Module Cabinet-Mounted replaces the legacy SBP encoder board, providing HTL/TTL encoder compatibility without motor rewiring. A SINAMICS S120 Line Module (ALM or SLM) handles DC bus infeed, replacing the MASTERDRIVES rectifier section. Where PROFIBUS DP is the plant network standard, the CU320-2 DP variant provides native PROFIBUS connectivity, maintaining compatibility with existing Siemens S7-300 or S7-400 PLC programs with minimal GSD file updates.

In multi-axis installations, the SINAMICS S120 Drive-CLiQ hub (DMC20 or DME20) simplifies encoder and motor data wiring across axes. For cabinet integration, SITOP PSU power supplies provide 24 VDC control voltage to the new CU320-2 and I/O modules, replacing aging MASTERDRIVES auxiliary power circuits. Where signal isolation between legacy field wiring and the new drive is required, SIEMENS SITRANS or third-party DIN-rail signal isolators are recommended to protect the new control unit inputs from legacy wiring noise.

Throughout the migration, the STARTER commissioning software (or TIA Portal SCOUT for newer S120 firmware) is used to upload, convert, and validate drive parameters, reducing re-commissioning time significantly compared to manual re-entry.

Retrofit Guidance FAQ

Q: Can I install the 6SE7027-2ED84-1HF5 without rewiring the control cabinet?
A: Yes. For a direct replacement within the same MASTERDRIVES MC chassis, the existing terminal block wiring, encoder cables, and PROFIBUS connector are fully compatible. No rewiring is required. Re-parameterization using DriveMonitor with a backed-up parameter file (.par) restores the drive to its previous operating state.

Q: Will my existing PROFIBUS DP network address and GSD configuration work?
A: Yes. The CBP2 PROFIBUS board retains its configured station address. The S7-300/S7-400 PLC program does not require modification for a like-for-like replacement. Only if upgrading to SINAMICS S120 will a GSD file update and minor PLC I/O mapping adjustment be needed.

Q: Is the physical footprint identical for cabinet installation?
A: The 6SE7027-2ED84-1HF5 is a direct form-factor replacement for the same MASTERDRIVES MC chassis slot. No cabinet modification, new mounting rails, or adapter frames are required. This is a key advantage over migrating to SINAMICS S120, which requires new cabinet space planning.

Q: How do I handle encoder compatibility during replacement?
A: The existing SBP or SBR encoder board and HTL/TTL encoder wiring are retained. After installing the replacement control unit, verify encoder channel assignment in the parameter set (P130x group) and confirm speed feedback signal integrity during test run before returning to production.

Q: What if my application requires a full migration to SINAMICS S120?
A: A structured migration involves: (1) selecting the correct CU320-2 variant (DP or PN), (2) sizing the Motor Module to the existing motor nameplate, (3) replacing the SBP encoder board with an SMC30, (4) updating the PROFIBUS GSD or PROFINET GSDML file in the PLC project, and (5) converting the MASTERDRIVES parameter set to SINAMICS format using STARTER’s migration wizard. TOPNLMS can advise on component selection for your specific axis configuration.

Q: What is the lead time and shipping arrangement?
A: Units are shipped from Xiamen, China. Standard international express delivery (DHL/FedEx) typically reaches most destinations within 3–7 business days. Expedited same-day dispatch is available for orders confirmed before 14:00 CST. All units are tested and packed with ESD protection before shipment.

Warranty Assurance

Every 6SE7027-2ED84-1HF5 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to dispatch, each unit undergoes a multi-point outgoing inspection including visual inspection, power-on functional verification, communication interface check, and parameter upload confirmation where applicable. Units are packed in anti-static ESD bags with foam cushioning to prevent transit damage.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Our after-sales response target is within 24 hours of claim submission. Warranty coverage includes manufacturing defects and functional failures under normal operating conditions. It does not cover damage resulting from incorrect installation, overvoltage events, or unauthorized modification.

For procurement teams requiring documentation, TOPNLMS can provide a test report, packing list, and commercial invoice with HS code declaration for customs clearance. Volume orders and blanket purchase agreements for MRO (Maintenance, Repair & Operations) stocking programs are supported.

To place an order, request a quotation, or discuss your specific migration requirements, contact our technical sales team directly.