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6RY1803-0CA03

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Siemens 6RY1803-0CA03 is a SINAMICS DCM field supply board for 2Q and 4Q converters, generating isolated firing pulses and sensing field current.
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Technical specifications for 6RY1803-0CA03

  • Manufacturer:
    Siemens
  • Part Number:
    6RY1803-0CA03
  • Product Family:
    Siemens SIMOREG DC-MASTER
  • Product Type:
    SINAMICS DCM Field Supply Board
  • Stock:
    1
  • Internal Board:
    C98043-A7115-L11
  • Converter Arrangement:
    2Q and 4Q
  • Field Infeed:
    3U1 and 3W1
  • Field Output:
    3C and 3D
  • Firing-Pulse Isolation:
    Pulse transformers
  • Current Feedback:
    Shunt-resistor actual-value sensing
  • Line-Voltage Sensing:
    Isolated at field-supply infeed
  • Synchronization Source:
    Field-supply infeed
  • Phase Relationship:
    Independent of armature and electronics infeed
  • Board Type:
    Field supply board
  • RoHS Compliance:
    Since 21.08.2013
  • Weight:
    0.34 lbs (0.153 kg)
  • Tariff Code:
    85049090
  • Country of origin:
    Romania
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Field Path Firing Pulses Current Feedback Sync Rules

Features:

  • Controls the field power stage in 2Q and 4Q SINAMICS DCM converters.
  • Isolates field firing commands through dedicated pulse transformers.
  • Returns measured field current through a shunt-based evaluation path.
The board occupies the field-converter branch rather than the armature control path.

Its input and output terminals keep incoming field power distinct from the controlled connection to the motor field.

An independent field-voltage measurement supplies the timing reference used for gating synchronization.

The Siemens 6RY1803-0CA03 SINAMICS DCM Field Supply Board is listed as an active product and may be available for purchase and support from Apter Power.
Siemens 6RY1803-0CA03 SINAMICS DCM Field Supply Board Manuals, Datasheets, Links Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.rrer">Inspect Siemens SIMOREG DC-MASTER Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Infeed and Controlled Output

  • Incoming field power: The supply connects at 3U1 and 3W1.
  • Load-side path: Controlled field output is provided at 3C and 3D.
  • Converter scope: The same board arrangement covers 2Q and 4Q converters.
  • Functional boundary: Field-current control remains separate from the armature channel.

Gate-Pulse Transfer

  • Pulse generation: The board develops firing commands for the field power stage.
  • Galvanic separation: Pulse transformers isolate the firing path.
  • Voltage acquisition: Field-supply line voltage is measured through an isolated circuit.
  • Timing reference: The isolated voltage signal establishes the field gating phase.

Field Actual-Value Circuit

  • Sensing element: Shunt resistors measure current in the field path.
  • Evaluation stage: Dedicated circuitry converts the shunt signal into the actual value.
  • Control return: The measured value is supplied to the field-current regulator.
  • Channel separation: Field feedback is evaluated independently of armature-current measurement.

Independent Field Phasing

  • Sync source: Gating timing is derived from the field-supply infeed.
  • Phase freedom: The field infeed phase angle may be selected independently.
  • Armature relation: No fixed phase relationship to the armature infeed is required.
  • Electronics relation: The electronics supply does not define the field gating phase.
Description
Designed for the field-converter section, Siemens 6RY1803-0CA03 is a SINAMICS DCM field supply board for 2Q and 4Q arrangements. The current Siemens product entry associates the spare part with internal board C98043-A7115-L11.

Three-phase field power enters 6RY1803-0CA03 at 3U1 and 3W1, and the controlled field output leaves through 3C and 3D. The board develops firing commands for the field power stage and transfers those pulses across pulse transformers for electrical isolation.

Actual field current is measured on Siemens 6RY1803-0CA03 by shunt resistors and their evaluation circuit. This feedback closes the information path between the field load and the converter control electronics without combining it with the armature-current channel.

For gating synchronization, 6RY1803-0CA03 measures the field-supply line voltage through an isolated circuit. The phase angle of the field infeed can be selected independently, so no fixed phase relationship is required between the field supply and the armature or electronics infeed.
Alternative Names
Siemens 6RY1803-0CA03 6RY1803 0CA03 6RY18030CA03 6RY 1803-0CA03 6RY1803-0CA03 Field Supply SINAMICS DCM 6RY1803-0CA03 C98043-A7115-L11 Field Board 6RY1803-0CAO3
Technical notes
Siemens 6RY1803-0CA03 controls the field power path through isolated firing-pulse circuits and monitors actual field current through shunt-based feedback.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Does 6RY1803-0CA03 belong to a 2Q or 4Q converter arrangement?
The field supply board 6RY1803-0CA03 is identified for both 2Q and 4Q SINAMICS DCM converter arrangements.
How are the field-power terminals separated on Siemens 6RY1803-0CA03?
Field infeed reaches Siemens 6RY1803-0CA03 at 3U1 and 3W1, while the controlled field output is connected at 3C and 3D.
What provides firing-pulse isolation on 6RY1803-0CA03?
Pulse transformers on 6RY1803-0CA03 electrically isolate the firing commands from the field power stage.
Where does 6RY1803-0CA03 obtain the actual field-current value?
Shunt resistors and their evaluation circuit supply the actual field-current feedback used by 6RY1803-0CA03.
Must the field infeed of 6RY1803-0CA03 be phase-aligned with the armature supply?
No fixed phase relationship is required; 6RY1803-0CA03 derives synchronization from its own field-supply infeed.
Which internal board reference should be matched to Siemens 6RY1803-0CA03?
The current Siemens product entry links Siemens 6RY1803-0CA03 with internal field-supply board C98043-A7115-L11.