Danfoss 175Z Series Relay & Control Modules 175Z2330 DT1

Technical Dossier

Product Details And Specifications

Danfoss 175Z Series Technical Notes

The Evolution of 175Z Series Architecture

The 175Z component numbering system was introduced by Danfoss as a unified spare parts catalog reference for board-level assemblies within the VLT® drive platform. Early iterations, associated with the VLT 3002–3800 and VLT 5001–5262 series (introduced in the late 1980s through the 1990s), used through-hole PCB construction with discrete relay logic and analog signal conditioning. These boards — including early relay output cards and gate driver assemblies — were designed for direct replacement in the field without drive reconfiguration.

The transition to surface-mount technology (SMT) in the early 2000s coincided with the VLT AutomationDrive FC 301/302 platform launch. This generation introduced IGBT gate driver boards, fieldbus option cards (PROFIBUS, DeviceNet, CANopen), and modular I/O expansion cards under the 175Z prefix. Compatibility between generations is not guaranteed: voltage ratings, connector pinouts, and firmware handshake protocols differ between VLT 5000-era and FC 302-era boards. Engineers sourcing 175Z parts must verify the drive frame size, software version, and hardware revision before substitution.

175Z Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced components within the Danfoss 175Z relay module and circuit board card family. Each entry reflects a discrete board-level assembly with a defined function within the VLT® drive architecture.

Relay Output & Control Board Modules

• 175Z2330 DT1: Relay module circuit board card; output relay interface for VLT drive control logic.
• 175Z0401: Relay output card; 3-relay output module for VLT 5000 series drives.
• 175Z0402: Extended relay output board; 5-relay configuration for high-density I/O applications.
• 175Z0403: Relay board assembly; used in VLT 3500–3800 frame sizes for motor contactor control.
• 175Z0861: Control card; main logic board for VLT 5001–5062 low-power frame drives.
• 175Z0862: Control card variant; VLT 5072–5102 mid-range frame, includes analog I/O terminals.
• 175Z0863: Control card; VLT 5122–5202 frame, supports encoder feedback input.

Gate Driver & Power Interface Boards

• 175Z0864: IGBT gate driver board; interfaces control card to power module in VLT 5000 series.
• 175Z1285: Gate driver card; FC 302 frame D/E, drives six-pulse IGBT bridge.
• 175Z1286: Power card assembly; DC bus measurement and brake chopper interface, FC 302.
• 175Z2829: Power card; FC 302 frame B, integrates inrush relay and soft-charge circuit.
• 175Z2830: Power card variant; FC 302 frame C, higher current rating soft-charge relay board.

Fieldbus Option & Communication Cards

• 175Z0114: PROFIBUS DP option card; MCA 101, plug-in fieldbus adapter for VLT AutomationDrive.
• 175Z0115: DeviceNet option card; MCA 104, CAN-based network interface module.
• 175Z0116: CANopen option card; MCA 105, DS301/DS402 compliant fieldbus adapter.
• 175Z0118: EtherNet/IP option card; MCA 121, dual-port industrial Ethernet adapter.
• 175Z0119: PROFINET IRT option card; MCA 120, real-time Ethernet for FC 302 platform.

I/O Expansion & Encoder Feedback Modules

• 175Z0172: General purpose I/O option card; MCB 101, 3 analog inputs / 2 analog outputs expansion.
• 175Z0174: Encoder input card; MCB 102, HTL/TTL incremental encoder interface for closed-loop control.
• 175Z0175: Resolver feedback card; MCB 103, for synchronous motor vector control applications.

Quality Control for the 175Z Range

Circuit board assemblies within the 175Z series present specific test challenges due to their integration of relay switching circuits, analog signal paths, and high-frequency gate drive signals on a single PCB. DriveKNMS applies a multi-stage inspection protocol to all 175Z units prior to dispatch.

Visual inspection covers solder joint integrity, capacitor condition (ESR measurement for electrolytic types), relay contact resistance, and connector pin seating. Functional testing is performed by installing the board into a compatible VLT drive frame and executing a defined load cycle: no-load run, ramp-up/ramp-down sequence, and relay output actuation verification. For gate driver boards, switching waveforms are captured on an oscilloscope to confirm rise/fall times within Danfoss specification. Control cards are tested for all analog I/O channels, digital input response, and serial communication handshake with the drive's LCP panel. Units that fail any stage are quarantined and not offered for sale.