VT-HNC100-1-23N-08-P-0 Digital Hydraulic Amplifier

The Rexroth VT-HNC100-1-23N-08-P-0 is a digital amplifier card (also known as a drive controller or servo amplifier) from the VT-HNC series. It is a critical electronic interface within the Rexroth HNC (Hydraulic Numeric Control) or VT-VRPA valve control system. Its primary function is to receive a low-power command signal (from a PLC or motion controller) and convert it into a high-power, precisely controlled pulse-width modulated (PWM) current to drive an electro-hydraulic proportional or servo valve. This enables precise control of hydraulic cylinder velocity, motor speed, or pressure/force in sophisticated industrial and mobile machinery.

This module is part of Rexroth’s digital control platform for hydraulics, offering advanced features like parameterization, diagnostics, and closed-loop control capabilities.

Add to quote

Description

VT-HNC100-1-23/W-08-0-0 R900955334

Rexroth VT-HNC100-1-23N-08-P-0 Digital Hydraulic Amplifier

Product Overview

This module is part of Rexroth’s digital control platform for hydraulics, offering advanced features like parameterization, diagnostics, and closed-loop control capabilities. The extended suffix -1-23N-08-P-0 defines its specific hardware configuration, input/output types, and firmware options.

Summarized Core Specifications (Always verify with official datasheet):

Manufacturer: Bosch Rexroth
Type: Digital Proportional Valve Amplifier Card
Control Inputs: Dual analog inputs (e.g., ±10V differential) for command and possibly feedback, plus digital inputs for enable, fault reset, etc.
Command Signal: Typically ±10V DC or 0..10V DC, representing 0-100% of valve spool stroke or current.
Output: PWM current output for a single solenoid. Max current: 8.0 A.
Supply Voltage: Typically 24V DC (nominal) for the amplifier electronics and valve solenoid power (via the card). Specifics depend on the -Pvariant.
Valve Compatibility: Designed to drive Rexroth 4WRPE, 4WRAE, 4WRLE or similar proportional directional valves with single solenoid and integrated spool position transducer (LVDT/RVDT) for closed-loop control.
Control Features: Onboard PID controller for closed-loop spool position control, dither current adjustment, ramp functions, parameter storage via software.
Diagnostics: LED status indicators, fault output relay, parameterizable monitoring functions (e.g., coil resistance, deviation).
Communication / Parameterization: Configured via Rexroth IndraWorks engineering software with a dedicated cable (USB or serial) or via fieldbus (if option present).

Main Features and Advantages

Precision Digital Control: Provides stable, high-resolution current control to the valve solenoid, ensuring precise and repeatable hydraulic actuator motion, crucial for applications like injection molding, press control, or test benches.
Integrated Closed-Loop Control: The amplifier performs closed-loop control of the valve spool position (using feedback from the valve’s internal LVDT), compensating for hysteresis and null shifts, resulting in superior linearity and dynamic response compared to analog amplifiers.
Software Configuration & Diagnostics: All parameters (gain, ramp, limits, diagnostics thresholds) are set via PC software, enabling easy tuning, adaptation to different valves, and advanced troubleshooting. Parameters are stored non-volatilely on the card.
Robust Industrial Design: Built for harsh industrial environments with protection against short-circuit, overload, and overtemperature.
LED Status Indication: Clear visual feedback on power, enable status, fault conditions, and signal activity.

Application Fields

This amplifier is used in any industrial hydraulic system requiring precise, programmable control of a proportional valve:

Injection Molding Machines: For controlling injection speed, holding pressure, and ejector motion.
Metal Forming Presses: For precise control of ram speed and pressure during the forming cycle.
Test & Simulation Equipment: For applying programmed load or motion profiles.
Industrial Automation: For controlling axes on heavy-duty manipulators, lifters, or material handling systems.
Mobile Machinery (Advanced): For controlling pilot stages or main valves in sophisticated mobile equipment.