Siemens 1790L811A Terminal / I/O / Signal Board – MM430/MM440 – New Original

Product Overview

Original Siemens 1790L811A terminal / I/O / signal board for MICROMASTER 410/420/430/440 series drives. It is the dedicated terminal board for MM430 and MM440 series drives, used across all frame sizes without power-rating dependency. The 1790L811A enables connection of sensors, push buttons, PLCs, and other external devices for start/stop control, frequency setting, and status feedback.

Key Features

• Genuine Siemens original – 1790L811A terminal / I/O / signal board
• Compatible with MICROMASTER 410/420/430/440 series drives
• Universal I/O module – common to all MM430/MM440 frame sizes
• Digital inputs/outputs at 24V DC (8 or 16 channels)
• Analog inputs/outputs (2 to 4 channels)
• Signal types supported: 0-10V, 4-20mA, TTL, PNP/NPN
• Output resolution: 12-bit
• Communication interface options: Profibus, Modbus, CANopen, Ethernet
• Relay outputs and communication interface support
• Hot-swappable modular design – maintenance without full power-down
• 35mm DIN rail or panel mounting
• Protection rating: IP20
• New original – factory sealed

Specifications

Compatibility Note

• Compatible with Siemens MICROMASTER 410, 420, 430, and 440 series drives
• Universal I/O board – the MM430 and MM440 use the same I/O board regardless of power rating (frame size type D, E, F, FX, GX)
• CRITICAL: Nameplate photo required – confirm drive series and original board marking
• If mismatched: Incorrect board selection may result in I/O terminals not functioning, missing digital/analog signals, or communication errors
• This board supports 8-16 digital inputs/outputs and 2-4 analog inputs/outputs with 12-bit resolution
• Verify drive model and original board marking before ordering
• Send drive nameplate photo for accurate matching

Quality Assurance

• New original – factory sealed packaging
• Actual photos sent before shipping
• Test video available upon request
• ESD anti-static packaging