VT-HNC100-1-23W-08-P-0 R900958999 Bosch Rexroth in stock
VT-HNC100-1-23W-08-P-0 R900958999 Bosch Rexroth in stock
he VT-HNC100-1-23W-08-P-0 (part number R900958999) is a high-precision electro-hydraulic proportional control valve controller from Bosch Rexroth, designed to regulate hydraulic valve operation in industrial machinery (e.g., injection molding machines, metalworking equipment, and heavy-duty mobile systems).
Before starting installation, ensure compliance with safety standards and verify all prerequisites to prevent equipment damage or operational failures:
1.1 Safety Precautions
Hydraulic System Isolation: Depressurize the entire hydraulic circuit connected to the target valve. Close all main shutoff valves and drain residual hydraulic fluid (if required by the system design) to avoid fluid leakage during installation.
Electrical Safety: Disconnect the main power supply of the machinery to eliminate electrical shock risks. Use an ESD (Electrostatic Discharge) wristband when handling the controller to protect sensitive electronic components.
Package Contents Verification: Confirm the VT-HNC100-1-23W-08-P-0 package includes:
1 × VT-HNC100 controller unit
1 × Mounting bracket (optional, depending on order configuration)
1 × Wiring diagram (labeled with part number R900958999)
1 × Set of mounting screws (M4 × 8 mm, stainless steel)
Compatibility Confirmation: Ensure the controller is compatible with the target hydraulic valve (e.g., Rexroth 4WRA/4WRZ series proportional valves) and the machinery’s power supply (24 VDC, as indicated by the “23W” code in the model name).
2. Physical Mounting
The VT-HNC100-1-23W-08-P-0 is designed for panel mounting or direct mounting on the hydraulic valve (via optional adapter). Follow the appropriate steps based on your installation scenario:
2.1 Panel Mounting (Standard Configuration)
Mounting Location Selection: Choose a location on the machinery’s control panel that meets the following criteria:
Ambient temperature: -10 °C to +55 °C (avoid direct sunlight or heat sources like hydraulic reservoirs).
Humidity: ≤ 90% RH (non-condensing, no exposure to water or oil splashes).
Clearance: Maintain at least 50 mm of space around the controller for airflow (prevents overheating) and access to wiring terminals.
Drilling Mounting Holes: Use the controller’s mounting flange as a template to mark 4 hole positions on the panel. Drill holes with a 3.5 mm diameter (to fit M4 screws).
Securing the Controller: Place the VT-HNC100 against the panel, aligning its mounting holes with the drilled holes. Fasten the controller using the provided M4 × 8 mm screws, tightening to a torque of 2.5–3 N·m (over-tightening may damage the flange).
2.2 Direct Valve Mounting (Optional)
If using the optional valve-mounting adapter (sold separately), attach the adapter to the hydraulic valve’s accessory port using the valve’s original mounting hardware (follow the valve manufacturer’s torque specifications).
Align the VT-HNC100’s mounting holes with the adapter’s holes. Secure the controller with M4 screws, tightening to 2–2.5 N·m (ensure no strain is applied to the controller’s wiring ports).
3. Electrical Wiring
Electrical connections must strictly follow the wiring diagram (R900958999) to avoid short circuits or controller damage. The VT-HNC100-1-23W-08-P-0 has three key terminal blocks: power supply, control signal input, and valve output.
3.1 Power Supply Wiring (24 VDC)
Locate the “POWER” terminal block on the controller (labeled “L+” for positive, “M” for negative).
Strip 6–8 mm of insulation from the ends of two 1.5 mm² copper wires (color-coded: red for L+, black for M).
Connect the red wire to the “L+” terminal and the black wire to the “M” terminal. Crimp terminal lugs (if required) for secure connections, then tighten the terminal screws to 0.8–1 N·m (use a torque screwdriver to avoid over-tightening).
Route the other ends of the wires to the machinery’s 24 VDC power supply (ensure the supply has a 10 A circuit breaker for overcurrent protection).
3.2 Control Signal Input Wiring
The controller accepts analog control signals (0–10 VDC or 4–20 mA, selectable via DIP switch on the controller).
Locate the “CONTROL INPUT” terminal block (labeled “IN+” for signal positive, “IN-” for signal negative, “GND” for ground).
For 0–10 VDC signals: Use 0.75 mm² wires to connect the signal source (e.g., PLC analog output) to “IN+” and “IN-“; connect the signal ground to “GND”.
For 4–20 mA signals: Use twisted-pair shielded cables (0.75 mm²) to connect the signal source to “IN+” and “IN-“; ground the cable shield at the controller end (prevents electromagnetic interference).
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