Description
The VT-HNC100-1-23/W-08-P-0 (where the “23” indicates the specific series/hardware revision) is a high-performance, programmable Digital Axis Controller specifically designed for electro-hydraulic drives. Part of the HNC100 family, this module is the industry standard for controlling complex hydraulic motions, including position, force, and pressure regulation.
Availability and Procurement
- Condition: New Original or Refurbished (Standardized Industrial Bench Testing)
- Warranty: 12-month technical replacement warranty.
- Lead Time: Typically 3–7 business days (Global priority shipping).
- Pricing: Technical specialized controller; contact our technical sales team for a firm, dated quote.
Technical Breakdown (Model Code)
- VT-HNC100: Series name (Digital axis control for hydraulic drives).
- 1: Number of controlled axes (Single-axis).
- 23: Hardware series/revision (replaces older 20/21 series).
- W: Bus interface: Sercos II (common in high-speed synchronized motion).
- 08: 8 Digital Inputs / 8 Digital Outputs.
- P: Programming: WIN-PED (Standard PC-based parameterization).
- 0: Specialized version code (Standard configuration).
Technical Specifications
The HNC100 is designed to bridge the gap between high-level PLC commands and the precise physical requirements of a hydraulic cylinder or motor.
| Parameter | Specification |
| Microprocessor | 32-bit high-speed signal processor |
| Bus Interface | Sercos II (Fiber Optic) |
| Analog Inputs | 4 (Voltage or Current selectable) |
| Analog Outputs | 2 (+/- 10 V for proportional valves) |
| Encoder Interface | 1x SSI or Incremental (for position feedback) |
| Supply Voltage | 24 V DC (18 V to 36 V) |
| Control Modes | Position, Force, Pressure, Velocity, and Alternating Control |
Core Functionality: Electro-Hydraulic Optimization
As a systems architect who has deployed Rexroth motion controls in heavy stamping and wood processing plants, I recommend focusing on these core capabilities:
1. Alternating Control (Position/Force)
The “killer feature” of the HNC100 is its ability to perform Alternating Control. It can command a cylinder to move to a specific position at high speed and then, upon making contact with a workpiece, seamlessly switch to a specific force or pressure setpoint without stopping or causing mechanical shock.
2. Valve Characteristic Linearization
Hydraulic proportional valves are inherently non-linear. The HNC100 allows you to map the specific flow-curve of the Rexroth valve you are using. This ensures that a 50% control signal results in exactly 50% of the rated flow, making the entire system predictable and stable.
3. Sercos II Integration
The “W” designation indicates this unit uses Sercos II fiber optic communication. This is ideal for multi-axis synchronization where jitter must be minimized. The fiber optic link also provides total immunity to the high electromagnetic interference (EMI) often found near large hydraulic power units (HPUs).
Engineering Insights: Deployment and Maintenance
1. Firmware and Software (WIN-PED)
The HNC100 must be parameterized using the WIN-PED software.
- Critical Tip: Before replacing a unit, ensure you have the
.hncconfiguration file from the old controller. Parameters include PID gains, transducer scaling, and valve offsets. Without this file, you will have to manually re-tune the hydraulic axis, which can take hours.
2. Transducer Shielding
Because the HNC100 processes high-speed analog feedback from LVDTs or pressure transducers:
- Best Practice: Always ground the shields at the HNC100 end only. If you have ground loops, the digital signal processor may see “noise” as physical movement, leading to oscillation or “hunting” of the cylinder.
3. 24V DC Stability
Digital controllers for hydraulics are sensitive to voltage drops caused by large solenoid valves firing on the same power circuit.
- Recommendation: Use a dedicated, stabilized 24V power supply for the HNC100 electronics, separate from the power supply used for the valve coils.
FAQ
Q: Can I use this with a third-party (non-Rexroth) valve?
A: Yes. While optimized for Rexroth Proportional/Servo valves, the +/- 10 V analog outputs can drive almost any standard industrial hydraulic valve.
Q: What does the “23” in the model code represent?
A: It represents the hardware generation. Series 23 is more modern and has better processing power than Series 20. They are usually backward compatible, but you must verify the WIN-PED software version you are using.
Q: Is there an Ethernet version?
A: Yes, Rexroth offers versions with PROFINET or EtherCAT (designated by different letters in the model code, such as “E” or “N”). The “W” model is specifically for Sercos II.
