0-52869
Description
Model Definition
0-52869: VCDA (Voltage Control & Drive Assembly) Board, Class WI
VCDA = Voltage Control & Drive Assembly (75–150 HP AC spindle drives)
Class WI: High-power drive classification (75–150 HP)
Complementary boards: Works with 0-52868 (VSAC, 15–50 HP), 0-52861 (DCGA), 0-52862 (CLSA) in high-power racks.
Technical Specifications
Board Type: 18D plug-in PCB, edge connector, metal faceplate (2 locking screws)
Function: DC bus voltage regulation, inverter gate drive control, over/undervoltage protection, fault signal coordination
Compatibility: Reliance MaxPak Plus / AutoMax PMI VS spindle drives (75–150 HP, Class WI)
Components: High-voltage power drivers, precision voltage regulators, gate drive optocouplers, fault logic circuits
Weight: ~0.91 kg (2.0 lbs)
Status: Discontinued by OEM; NOS/refurbished/used only.
Interfaces & Communication
Edge Connector: Connects to drive rack backplane for DC bus, control power, gate drive signals, and fault interlocks
Power I/O: Direct interface to high-power IGBT/SCR inverter stage
Fault Output: Isolated relay contacts for system alarm and drive shutdown
Isolation: 2500Vrms isolation between control logic and power stage
Fieldbus: None; hardware-based voltage and drive control.
Key Features
Dedicated voltage control and gate drive for 75–150 HP Class WI AC spindle drives
Precision DC bus regulation with fast transient response for heavy machining loads
Integrated gate drive signaling for high-power inverter modules
Coordinates with VSAC (0-52868) for over/undervoltage fault protection
Direct plug-in replacement for VCDA boards in 75–150 HP MaxPak Plus racks
Industrial-grade components for high-power, high-vibration environments.
Application
Reliance MaxPak Plus / AutoMax PMI VS spindle drives (75–150 HP, Class WI)
Heavy-duty CNC machining centers, large spindle motor control
Legacy high-power AC drive voltage regulation and gate drive replacement
Works with 0-52868 (VSAC) and 0-52862 (CLSA) in the same drive rack.
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