Description
⚙️ Product Overview
The NORIS AUTOMATION SG 2000 is a marine and industrial servo controller designed to regulate proportional directional control valves. It converts a standard ±10 VDC command signal from an automation or propulsion-control system into controlled PWM current for proportional valve solenoids.
The SG 2000 is particularly suited to hydraulic control circuits used in variable-pitch propeller (CPP) systems and other marine propulsion applications. It supports two proportional valve outputs and includes current monitoring, enable control, fault indication, and a built-in jitter function to help prevent valve spool sticking.
The unit operates from a nominal 24 VDC supply, with an operating range of approximately 18–32 VDC. Its self-monitoring function provides a fault output, while status LEDs allow quick identification of operating and fault conditions.
🔧 Key Features
- Designed for proportional directional valve control
- Supports up to two proportional solenoids
- ±10 VDC analog command input
- 24 VDC nominal supply
- PWM-controlled proportional valve outputs
- Built-in jitter signal to reduce valve sticking
- Enable input through dry contact or +24 V signal
- Current feedback / measurement outputs
- Integrated fault monitoring
- Color-coded status LEDs
- Suitable for marine propulsion and industrial hydraulic automation
- Designed for cabinet or terminal-box installation
- Compatible with NORIS marine automation system components
📊 Technical Datasheet
| Parameter | Specification |
|---|---|
| Brand | NORIS AUTOMATION GMBH |
| Model | SG 2000 |
| Part Number / Type | SG2000 |
| Product Series | SG 2000 Servo Controller |
| Product Name | Servo Controller Module |
| Product Type | Proportional Valve Servo Controller |
| Power Supply | 24 VDC nominal, approximately 18–32 VDC operating |
| Command Input | ±10 VDC setting signal |
| Valve Outputs | 2 proportional solenoid outputs, PWM controlled |
| Application | Marine propulsion, CPP systems and industrial hydraulic valve control |
🛠️ Servo Control Function
The SG 2000 receives the required valve-position command from an automation controller. Depending on the polarity and level of the ±10 VDC command, the controller regulates the corresponding proportional solenoid.
The output current is controlled electronically rather than simply switching the valve on and off. This provides the proportional behavior required for hydraulic valve actuation.
A PWM control method is used for the solenoid outputs. The controller also generates a jitter component that helps reduce friction-related sticking of the valve spool during operation.
🔌 System Integration
A typical control chain can be arranged as:
Automation / Propulsion Controller → ±10 V Command → SG 2000 → Proportional Valve → Hydraulic Actuator
The SG 2000 can therefore serve as the interface between a marine automation system and a hydraulic proportional valve. The enable signal provides an additional control condition, while the fault output can be connected to the vessel’s monitoring or alarm system.
The controller provides measurement points for desired and actual current, making it useful for commissioning and troubleshooting.
🚢 Typical Applications
The SG 2000 is suitable for applications such as:
- Controllable-pitch propeller systems
- Marine propulsion control
- Hydraulic proportional valve systems
- Engine-room automation
- Steering and actuator control systems
- Industrial hydraulic machinery
- Legacy NORIS marine automation installations
- Replacement of existing SG 2000 servo controller units
🔧 Installation & Commissioning
Before installation, verify the complete part identification and compare the existing wiring with the vessel or machine control drawings.
Recommended commissioning procedure:
- Confirm the 24 VDC supply and polarity.
- Check the ±10 VDC command signal from the automation controller.
- Verify the enable input is correctly wired.
- Confirm both proportional solenoid connections.
- Inspect valve wiring for shorts or open circuits.
- Check the fault-output circuit.
- Apply the control command gradually during initial testing.
- Monitor desired and actual output current.
- Confirm correct valve direction and proportional response.
- Verify that no fault LED remains active after commissioning.
🔍 Troubleshooting Guide
No output current:
Check the 24 VDC supply, enable signal, command input, wiring, and controller status LEDs.
Valve moves in the wrong direction:
Check the polarity of the ±10 V command and verify that the proportional solenoid connections correspond to the intended direction.
Valve response is unstable:
Inspect the command signal for electrical noise and verify the hydraulic valve and solenoid condition.
Current reaches the limitation level:
Check the solenoid resistance, wiring, valve condition, and possible mechanical blockage.
Fault output is active:
Check supply voltage, auxiliary voltage, control-loop wiring, and possible short circuit or cable break.
🧰 Maintenance
For legacy marine automation systems, periodic inspection of the SG 2000 and its connected valve circuit is recommended.
Check:
- DC supply voltage
- Terminal tightness
- Solenoid wiring
- Command-signal quality
- Enable circuit
- Fault output
- Status LEDs
- Current feedback
- Cabinet contamination and moisture
- Hydraulic valve mechanical condition
Because the SG 2000 is part of a closed-loop valve-control arrangement, replacing the electronic controller alone may not correct a fault caused by a damaged solenoid, cable, hydraulic valve, or upstream automation controller.
🔄 Replacement Considerations
When replacing an existing SG 2000, verify the model identification, terminal arrangement, supply voltage, command-signal configuration, solenoid characteristics, and control-system wiring before installation.
For vessel automation projects, it is also advisable to compare the replacement unit with the original system drawings and commissioning records. This is especially important when maintaining older propulsion or CPP control systems.
❓ FAQ
What does the NORIS SG 2000 control?
It controls proportional directional valves, particularly hydraulic valves used in marine propulsion and variable-pitch propeller systems.
What is the normal supply voltage?
The nominal supply is 24 VDC, with an operating range of approximately 18–32 VDC.
What type of command signal does it use?
The controller accepts a ±10 VDC setting signal from the automation system.
How many proportional valves can it control?
The SG 2000 is designed to control up to two proportional valve solenoids.
Does it provide fault monitoring?
Yes. The controller incorporates self-monitoring and provides a fault output for connection to an external monitoring or alarm system.
What is the purpose of the jitter signal?
The jitter component helps reduce the tendency of proportional valve spools to stick during operation.
Can it be used for a marine CPP system?
Yes. The SG 2000 is specifically suitable for proportional valve control in variable-pitch propeller applications.
Is the SG 2000 suitable as a direct replacement?
It can be used as a replacement when the electrical configuration, valve characteristics, wiring, and control-system requirements match the original installation.
What should be checked before powering a replacement unit?
Verify supply polarity, command input, enable circuit, solenoid wiring, fault output, and terminal assignments against the original installation documentation.
Is it useful as a maintenance spare?
Yes. Keeping a correctly matched SG 2000 as a spare can reduce downtime on legacy marine propulsion and hydraulic control systems.
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📌 Product Summary
The NORIS AUTOMATION SG 2000 is a specialized 24 VDC servo controller for proportional hydraulic valves, providing ±10 V command processing, PWM solenoid control, current monitoring, enable control, and fault supervision. Its marine-oriented design makes it particularly relevant to CPP propulsion systems and legacy NORIS automation installations where reliable replacement spares are required.
