Siemens C98043-A7014-L2 Field Powerboard 30A for 6RA
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Product Information
The Siemens C98043-A7014-L2 is an internal 30A field powerboard module designed for SIMOREG DC MASTER variable speed drives, including the 6RA70 and 6RA24 converter series. Functioning as a dedicated field power supply board, this unit delivers up to 30 amperes of continuous output to power DC motor excitation circuits. Installed directly inside the drive chassis, the module generates regulated excitation current essential for maintaining precise motor torque and speed control across demanding industrial processing systems.
Interfacing internally within the converter chassis, the C98043-A7014-L2 links directly to the main CUD1 drive control unit via a ribbon and pin header connection, with AC power delivered through the U2 and V2 field input terminals. When commissioning a replacement board, configuration requirements are minimal because drive parameters and configuration data are stored centrally on the EEPROM of the main CUD1 controller. Following physical installation, operators verify parameters such as rated field line voltage P078 and field current setting P102 using Siemens DriveMonitor or SIMOVIS engineering software. ABC Industrial Parts can assist in sourcing fully tested spare units to restore drive function without full drive replacement.
System diagnostics and operating parameters are continuously monitored by the main drive controller and accessible via the PMU operator panel or DriveMonitor interface. Key diagnostic readout values include parameter r019 for actual field current, r035 for field setpoint, and operational status parameter r000. Fault conditions in the excitation circuit trigger system trip codes such as F005 for field current failure, F006 for field overcurrent, or F007 for field supply voltage loss. If diagnostic checks reveal internal component breakdown or failure of the gating and power circuits on the board, hardware-level repairs or an exchange unit from ABC Industrial Parts provide an efficient route back to operational status.
Technical Specifications
| Manufacturer | Siemens |
| Part Number | C98043-A7014-L2 |
| Model / Type | Field Powerboard 30A for 6RA |
| Component Type | Field Power Supply Board |
| Product Family | SIMOREG DC MASTER |
| Drive Compatibility Scope | SIMOREG 6RA70 and 6RA24 DC Master Converters |
| Rated Field Current | 30 A |
| Internal Interface | Ribbon/Pin Header Cable to CUD1 Unit |
| Field AC Input Terminals | U2 / V2 |
| Compatible Software | DriveMonitor, SIMOVIS |
| Lifecycle Status | Discontinued |
Programming and Configuration
The C98043-A7014-L2 field powerboard relies on parameter settings managed directly by the main drive control board. Parameter values determining field operation, including rated field line voltage in parameter P078 and rated motor field current in parameter P102, are held in the non-volatile EEPROM memory of the primary CUD1 unit rather than on the powerboard itself.
Engineers can review and adjust excitation parameters through the drive's integrated PMU operator panel or by using Siemens DriveMonitor or SIMOVIS software. Because the powerboard operates under the direct command of the main controller, replacing a failed module does not require loading new software firmware or re-flashing local memory, provided the core drive configuration remains intact on the CUD1 card.
Communication and System Integration
Internal connection between the C98043-A7014-L2 and the main drive electronics is established via a multi-pin ribbon cable header. This interface transmits gating control signals from the primary CUD1 board directly to the field power assembly while returning operational feedback to the central processing electronics.
AC field supply power is delivered to the board through dedicated U2 and V2 line input terminals located within the drive housing. Proper physical seating of the internal ribbon cable and secure termination of the AC field supply lines ensure reliable excitation control across the full operational range of SIMOREG 6RA70 and 6RA24 DC converters.
Diagnostics and Status Indication
Diagnostic monitoring for the C98043-A7014-L2 is fully integrated into the host SIMOREG drive display and software environment. Technicians can assess excitation performance in real time using readout parameters on the PMU operator panel or within DriveMonitor software, including parameter r019 for actual field current output, r035 for the active field setpoint, and r000 for general drive status.
When excitation faults occur, the drive controller logs specific error events to isolate the fault location. Operational anomalies such as missing field supply voltage at terminals U2 and V2 or current generation failures are reported immediately, helping maintenance personnel distinguish between external field circuit issues and internal powerboard defects.
Replacement and Spare Part Considerations
As the Siemens SIMOREG 6RA70 and 6RA24 drive lines are discontinued, maintaining individual replacement hardware such as the C98043-A7014-L2 field powerboard is an effective strategy for extending legacy drive service life. Utilizing drop-in replacement boards avoids the high costs and downtime associated with migrating complete drive systems to modern SINAMICS DCM platforms.
When replacing the C98043-A7014-L2, maintenance personnel should confirm that the replacement board matches the 30A current rating required by the specific converter chassis. Because operating parameters reside on the main CUD1 control card, installation primarily involves physical mounting, internal ribbon cable attachment, and verification of parameters P078 and P102 prior to restarting the drive.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| F005 | Field current fault | Field current cannot be established when field setpoint is active. | Field circuit open, defective field power board, blown field line fuse, incorrect field current parameter P102. | Inspect field line fuses and field circuit connections. Measure field winding resistance. If field gating or power circuit on C98043-A7014-L2 has failed, replace the board. |
| F006 | Field overcurrent | Field current exceeds permissible upper threshold limit. | Short circuit in field winding or supply lines, failure of field regulator, defective field power board. | Check field winding insulation and resistance. Inspect field power board for shorted components. |
| F007 | Field supply voltage failure | Field supply AC voltage is missing or below minimum threshold. | Blown AC field line fuse, missing line voltage at field input terminals (U2/V2). | Check AC supply voltage and fuses feeding the field terminals. |
Frequently Asked Questions
What is the primary function of the Siemens C98043-A7014-L2 powerboard?
The Siemens C98043-A7014-L2 is an internal field power supply board that delivers up to 30A of continuous excitation current to DC motor field windings within SIMOREG 6RA70 and 6RA24 DC MASTER drives.
Which Siemens drive series are compatible with the C98043-A7014-L2?
This field powerboard is compatible with Siemens SIMOREG 6RA70 and SIMOREG 6RA24 DC MASTER converter series.
Does replacing the C98043-A7014-L2 require reloading drive parameters?
Drive parameters are stored on the central EEPROM of the main CUD1 control unit rather than on the powerboard. After replacing the board, technicians should verify parameters P078 and P102 using the PMU panel or DriveMonitor software.
What does fault code F005 indicate on a SIMOREG drive?
Fault code F005 indicates a field current fault where field current cannot be established while the setpoint is active. This can be caused by an open field circuit, a blown fuse, incorrect parameter P102 settings, or a failure on the C98043-A7014-L2 board.
How can technicians monitor field current on this powerboard?
Real-time field current can be monitored via parameter r019 (actual field current) and parameter r035 (field setpoint) on the PMU operator panel or through Siemens DriveMonitor software.
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