Application: Precise end-position control for Ridder RW gear motors Function: Linear switching system driven mechanically by the motor’s output shaft Compatibility: For RW motors with 55, 86, 97, or 860 turns between start and end position Installation: Mounted directly on the gear motor Special feature: High switching accuracy and robust design for continuous greenhouse use Ridder Article No.: 501090 The RSU 90 Limit Switch System enables precise control of opening and closing positions in greenhouse ventilation, shading, and lifting systems. It is mechanically driven by the motor shaft and supports up to 860 revolutions depending on the motor type. Ideal for automated climate control.

Application: End-position control for Ridder RW gear motors Function: Linear switching system driven by the motor’s output shaft Compatibility: For RW motors with 55, 86, 97, or 860 turns between start and end position Installation: Direct mounting on the gear motor Special feature: Compact design with high switching precision Ridder Article No.: 501094 The RSU 50 Limit Switch System is a compact and robust solution for controlling the end positions of RW gear motors. It ensures accurate movement limits and is ideal for use in greenhouse ventilation and shading systems.

Application: Digital positioning sensor for Ridder RW gear motors Signal output: 4–20 mA (also configurable to 0–5 V or 0–10 V) Technology: Contactless Hall sensor with magnetic axis Accuracy: ±0.04% of the learned measuring range Compatibility: All RW motors with RSU limit switch system Features: Reverse-polarity protection, LED status display, reference input Ridder Article No.: 502687 The RPU 24V / 4–20 mA / V3 is a high-precision digital positioning unit for Ridder RW motors. It continuously reports the motor position to a climate controller and is ideal for ventilation, shading, and lifting systems. Its contactless design ensures maintenance-free operation and long-term reliability.

Application: Drive unit for ventilation and screen systems in greenhouses or barns Voltage: 400–450 V, 3~, 50 Hz Speed: 3 rpm Limit switch: Integrated linear limit switch system with a 97-turn operating range Features: Self-locking worm gear for secure shaft position at standstill Quiet operation due to optimized gear combinations Maintenance-free and compact design Optional RPU PositioningUnit or potentiometer feedback Graphite-grey powder coating Ridder Article No.: 502010 The RW 45-3 / 400–450 V is a compact and maintenance-free gear motor for greenhouse ventilation and shading systems. It features a self-locking worm gear, a precise linear limit switch system, and optional feedback integration for climate control systems.

Application: Drive unit for horizontal shading systems in greenhouses Torque: 250 Nm Voltage: 400 V, 3~, 50 Hz Speed: 4.4 rpm Power: 0.30 kW Current: 1.10 A Shaft: Type 06 Limit switch: Precision gear limit switch END 20 for 580 shaft revolutions Features: Extremely quiet, self-locking double worm gear Maintenance-free and long-lasting Universal mounting: rear (standard) or optionally left-side (symmetrical) Wiring via 7-core cable The Lock EWA 12.2505 is a powerful gear motor designed for professional use in greenhouse shading systems. Its self-locking double worm gear ensures quiet and reliable movement of the screens. With flexible mounting options and an integrated precision limit switch, it offers versatile and user-friendly installation.

Application: Maintenance-free drive for ventilation, shading, and lifting systems in greenhouses and livestock buildings Voltage: 400–450 V, 3-phase Speed: 5 rpm Protection class: IP55 – dust and water resistant End switch: Patented linear limit switch system with high switching accuracy Temperature range: 0–60 °C Features: Quiet operation, self-locking worm gear, optional RPU PositioningUnit or potentiometer kit Ridder Article No.: 502320 The RW245-37 motor gearbox is a rugged, low-maintenance drive unit designed for greenhouse automation. Its precise limit switch system and quiet, self-locking transmission ensure reliable performance in demanding environments.

Application: Drive unit for ventilation, screen, and lifting systems in greenhouses and barns Voltage: 400 V, 3~, 50 Hz Switching range: Integrated linear limit switch system with a switching range of 86 turns Protection class: IP55 – dust and water jet resistant Limit switch: Patented linear limit switch system with high switching precision Features: Self-locking worm gear for secure shaft position at standstill Maintenance-free and compact design Suitable for ambient temperatures from 0–60 °C Optional: RPU PositioningUnit or potentiometer feedback Ridder Article No.: 537200 The RW 241-09 / 400 V is a compact, maintenance-free gear motor for greenhouse ventilation, shading, and lifting systems. Its IP55 protection and self-locking worm gear ensure safe operation even in demanding environments. The integrated linear limit switch system allows precise control over up to 86 shaft revolutions.

Application: Drive unit for horizontal shading systems in greenhouses Torque: 50 Nm Voltage: 400 V, 3~, 50 Hz Speed: 5.6 revolutions per minute Power: 0.11 kW Current: 0.45 A Shaft: Type 06 Limit switch: Precision gear limit switch END 20 for 580 shaft revolutions Features: Extremely quiet, self-locking double worm gear Maintenance-free and long-lasting Universal mounting: rear (standard) or optionally left-side (symmetrical) Wiring via 7-core cable The Lock EWA 10.0505 is a compact and efficient gear motor for horizontal shading systems. With 50 Nm torque and a quiet, self-locking double worm gear, it ensures precise and reliable screen movement. The integrated limit switch and flexible mounting options make it ideal for small to medium greenhouse installations.

Application: Drive unit for horizontal shading systems in greenhouses Torque: 250 Nm Voltage: 400 V, 3~, 50 Hz Speed: 4.4 revolutions per minute Power: 0.30 kW Current: 1.10 A Shaft: Type 66 (hexagonal) Limit switch: Precision gear limit switch END 20 for 580 shaft revolutions Features: Extremely quiet, self-locking double worm gear Maintenance-free and long-lasting Universal mounting: rear (standard) or optionally left-side (symmetrical) Wiring via 7-core cable The Lock EWA 12.2505 is a powerful gear motor specifically designed for horizontal shading systems in greenhouses. With 250 Nm torque and a speed of 4.4 rpm, it ensures precise and reliable control of screen movement. Its extremely quiet, self-locking double worm gear offers long service life without maintenance. The integrated precision gear limit switch END 20 enables accurate control with up to 580 shaft revolutions. Thanks to universal mounting options, the motor can be installed at the rear or optionally on the left side, making it adaptable to various system configurations.

Application: Drive unit for ventilation, shading, and lifting systems in greenhouses or livestock buildings Voltage: 400–450 V, 3-phase Speed: 5 rpm Protection class: IP55 – sealed housing with linear limit switch system End switch: Patented linear system with operating and safety switches (adjustable up to 86 turns) Features: Self-locking worm gear, quiet operation, graphite-grey powder coating Optional: RPU PositioningUnit or potentiometer feedback kit Ridder Article No.: 502220 The RW405 motor gearbox is a compact and maintenance-free drive unit for greenhouse automation. Its precise switching system and robust construction ensure long-term reliability in demanding environments.

Application: Drive unit for horizontal shading systems in greenhouses Torque: 150 Nm Voltage: 400 V, 3~, 50 Hz Speed: 4.3 rpm Power: 0.17 kW Current: 0.90 A Shaft: Type 66 (hexagonal) Limit switch: Precision gear limit switch END 20 for 580 shaft revolutions Features: Extremely quiet, self-locking double worm gear Maintenance-free and long-lasting Universal mounting: rear (standard) or optionally left-side (symmetrical) Wiring via 7-core cable The Lock EWA 12.1505 is a compact and efficient gear motor for horizontal shading systems. It combines quiet operation with high reliability and flexible mounting options. The integrated limit switch ensures precise control, making it ideal for small to medium greenhouse installations.

Application: Drive unit for ventilation, screen, and lifting systems in greenhouses and barns Voltage: 110–115 V, 1~, 50/60 Hz Limit switch: Patented linear limit switch system with operating and safety switches Switching range: Integrated linear limit switch system with a switching range of 86 turns Features: Self-locking worm gear for secure shaft position at standstill Quiet operation through optimized gear and worm combinations IP55 housing with sealed limit switch system Graphite-grey powder coating for high corrosion resistance Includes mounting bolts and spring washers Ridder Article No.: 502351 The RW 245-37 / 110–115 V is a powerful and maintenance-free gear motor for greenhouse applications. Its patented linear limit switch system allows precise control, and the self-locking worm gear ensures safety and reliability. Ideal for ventilation, shading, and lifting systems.

Application: Drive unit for horizontal shading and ventilation systems Voltage: 400 V, 3~, 50 Hz Switching range: Integrated linear limit switch system with a switching range of 86 turns Limit switch: Integrated linear limit switch system Features: Self-locking worm gear for secure shaft position at standstill Quiet and compact design Delivered with pre-installed chain wheel for chain coupling Optional: RPU PositioningUnit or potentiometer feedback Ridder Article No.: 502000 The RW 45-1-09 / 400 V is a three-phase gear motor for greenhouse shading and ventilation. It combines quiet operation with robust performance and is equipped with a linear limit switch system for precise control. The pre-installed chain wheel simplifies integration into existing systems.

Application: Drive unit for ventilation, shading, and lifting systems in greenhouses or livestock buildings Voltage: 400–450 V, 3-phase Speed: 3 rpm Protection class: IP55 – sealed housing with linear limit switch system End switch: Built-in linear system with operating and safety switches (max. 86 turns) Features: Self-locking worm gear, quiet operation, graphite-grey powder coating Optional: RPU PositioningUnit or potentiometer feedback kit Ridder Article No.: 502210 The RW403 motor gearbox is a reliable and quiet drive solution for greenhouse systems. Its integrated switching system ensures precise control and long service life.

Application: Drive unit for horizontal shading systems Torque: 600 Nm Speed: 4.4 rpm Voltage: 400 V, 3~, 50 Hz Power: 0.80 kW Current: 2.80 A Shaft: Hexagonal 66 mm Features: Extremely quiet, self-locking double worm gear - maintenance-free Mounting: Universal mounting via standard base (removable feet) - rear or optionally left-side (symmetrical) Limit switch: Integrated precision gear limit switch END 20 for 580 shaft revolutions (micro switch cURus) Wiring: Use 7-core cable The Lock EWA 14.6005 is a powerful and quiet gear motor designed for horizontal shading systems. Its self-locking double worm gear ensures long service life without maintenance. The motor features flexible mounting options and a built-in precision limit switch for accurate positioning. Ideal for demanding greenhouse applications.

Application: Drive unit for horizontal shading systems in greenhouses Torque: 150 Nm Voltage: 400 V, 3~, 50 Hz Speed: 4.3 rpm Power: 0.17 kW Current: 0.90 A Shaft: Type 06 Limit switch: Precision gear limit switch END 20 for 580 shaft revolutions Features: Extremely quiet, self-locking double worm gear Maintenance-free and long-lasting Universal mounting: rear (standard) or optionally left-side (symmetrical) Wiring via 7-core cable The Lock EWA 12.1505 with shaft type 06 offers the same performance and reliability as its hexagonal counterpart, but with a different shaft interface. It’s ideal for horizontal shading systems requiring compact, quiet, and precise motor control.

Application: Drive unit for ventilation and screen systems in greenhouses or barns Voltage: 220 V, 1~, 50 Hz Speed: 3 rpm Limit switch: Integrated linear limit switch system with a 97-turn operating range Features: Self-locking worm gear for secure shaft position at standstill Quiet operation due to optimized gear combinations Maintenance-free and compact design Optional RPU PositioningUnit or potentiometer feedback Graphite-grey powder coating The RW45-3-09\230\1\97 is a compact and maintenance-free gear motor for greenhouse ventilation and shading systems. It features a self-locking worm gear, a precise linear limit switch system, and optional feedback integration for climate control systems.

Application: Drive unit for horizontal shading and ventilation systems Voltage: 230 V, 1~, 50 Hz Switching range: Integrated linear limit switch system with a switching range of 86 turns Limit switch: Integrated linear limit switch system Features: Self-locking worm gear for secure shaft position at standstill Quiet and compact design Delivered with pre-installed chain wheel for chain coupling Optional: RPU PositioningUnit or potentiometer feedback Ridder Article No.: 502030 The RW 45-1-09 / 230 V is a single-phase gear motor for greenhouse shading and ventilation. It features a self-locking worm gear and a precise linear limit switch system. Delivered with a pre-installed chain wheel, it’s ready for integration into flexible drive systems.

Application: Drive unit for ventilation and screen systems in greenhouses or barns Voltage: 400–450 V, 3~, 50 Hz Speed: 5 rpm Limit switch: Integrated linear limit switch system with a 97-turn operating range Features: Self-locking worm gear for secure shaft position at standstill Quiet operation due to optimized gear combinations Maintenance-free and compact design Optional RPU PositioningUnit or potentiometer feedback Graphite-grey powder coating Ridder Article No.: 502020 The RW45-5 / 400–450 V is a powerful and compact gear motor for greenhouse ventilation and shading systems. It features a self-locking worm gear, precise limit switch control, and optional feedback integration for climate automation. Built for durability and quiet operation.

Application: Drive technology for greenhouse shading and ventilation systems Torque: 90 Nm Voltage: 400 V / 50 Hz Speed: 5.6 rpm Shaft: Type 06 Limit switch: END20.20 The Lock EWA 10.0905 is a compact and powerful electric drive for shading and ventilation systems in greenhouses. With 90 Nm torque and 400 V operating voltage, it delivers reliable and precise control. Equipped with shaft type 06 and the END20.20 limit switch, it is suitable for a wide range of applications. The rotation speed of 5.6 rpm ensures smooth movement and high efficiency.

Type: EWA 52.2505 – Electric drive with worm gear Model number: 12528.2505.1205 Torque: 250 Nm Speed: 4.4 rpm Voltage: 400 V, 3-phase, 50 Hz Power: 0.52 kW Current draw: 1.20 A Weight: 27.7 kg Design: We06 Protection class: IP55 Duty cycle: S3–40% (intermittent) Temperature range: –5 °C to +60 °CLimit switch: END20.20Application: Ventilation and shading systems in greenhouses The Lock EWA 52.2505, model number 12528.2505.1206, is a powerful and durable electric drive unit designed for demanding applications in greenhouse ventilation and shading systems. With a torque of 250 Nm and a controlled speed of 4.4 rpm, it ensures precise and reliable motion control—even under heavy loads. Its self-locking double worm gear provides secure positioning without the need for additional braking mechanisms. The compact We06 design allows for flexible integration into existing setups, while the IP55 protection rating ensures safe operation in humid or dusty environments. The S3–40% duty cycle makes it ideal for cyclical movement patterns typical in greenhouse automation. This maintenance-free drive is engineered for maximum service life, minimal downtime, and high operational safety—making it a trusted solution for professional greenhouse control systems.Note: This gear motor replaces the Lock EWA 52.2505 (12528.2505.1206).

Type: EWA 52.3505 – Electric drive with worm gear Model number: 12528.3505.32 Torque: 350 Nm Speed: 4.4 rpm Voltage: 400 V, 3-phase, 50 Hz Power: 0.92 kW Current consumption: 1.60 A Weight: 28.4 kg Mounting form: We66Limit switch: END20.20 Protection rating: IP55 Duty cycle: S3–40% (intermittent) Temperature range: –5 °C to +60 °C Application: Ventilation and shading systems in greenhouses The Lock EWA 52.3505, model number 12528.3505.32, is a high-performance electric drive designed for automated ventilation and shading systems in greenhouses. With a torque of 350 Nm and a precise speed of 4.4 rpm, it reliably and smoothly moves even heavy loads. Its self-locking double worm gear ensures secure position holding without the need for additional braking mechanisms—ideal for applications with high safety requirements. The robust We66 mounting form allows for stable installation, even in large-scale constructions. Thanks to its IP55 protection rating, the drive is well protected against dust and moisture, making it suitable for continuous operation in greenhouse environments. The S3–40% duty cycle makes it ideal for cyclic motion sequences, such as those found in automated ventilation systems. Note: This model replaces the EWA 14.3505 (12214.3505.66).

Type: EWA 52.2505 – Electric drive with worm gear Model number: 12528.2505.3205 Torque: 250 Nm Speed: 4.4 rpm Voltage: 400 V, 3~ (three-phase AC), 50 Hz Power: 0.52 kW Current consumption: 1.20 A Weight: approx. 28.4 kg Duty cycle: S3–40% Protection rating: IP55 Temperature range: –5 °C to +60 °C Gear system: Self-locking double worm gear Limit switch: END20.20 (integrated) Shaft: We66 The electric drive EWA 52.2505, model number 12528.2505.1232, is designed for intermittent operation according to duty cycle S3–40%. It delivers a constant torque of 250 Nm at a speed of 4.4 rpm and operates on 400 V three-phase AC. The integrated double worm gear is self-locking, enabling secure positioning without backdriving. The We66 shaft, with a length of 385 mm, is built into the drive and designed for applications requiring extended stroke or larger structural setups. It offers enhanced flexibility in positioning and power transmission. The END20.20 limit switch is factory-integrated and matched to the motor. It ensures reliable shutoff at end positions and protects the system from overrun. With a protection rating of IP55, the drive is safeguarded against dust and water jets. The permissible ambient temperature range is between –5 °C and +60 °C. This drive is ideal for greenhouse applications, particularly for controlling ventilation and shading systems. Note: The Lock EWA 52.2505 replaces the previous model Lock EWA 12.2505 (12212.2505.66).

Type: EWA 52.6005 – Electric drive with worm gear Model number: 12528.6005.3205 Torque: 600 Nm Speed: 4.4 rpm Voltage: 400 V, 3~ (three-phase AC), 50 Hz Power: 1.27 kW Current consumption: 2.20 A Weight: approx. 28.4 kg Duty cycle: S3–40% Protection rating: IP55 Temperature range: –5 °C to +60 °C Gear system: Self-locking double worm gear Limit switch: END20.20 (integrated) Shaft: We66 The electric drive EWA 52.6005, model number 12528.6005.3205, is designed for intermittent operation according to duty cycle S3–40%. It delivers a constant torque of 600 Nm at a speed of 4.4 rpm and operates on 400 V three-phase AC. The integrated double worm gear is self-locking, enabling secure positioning without backdriving. The We66 shaft, with a length of 385 mm, is built into the drive and suited for applications requiring extended stroke or larger structural setups. It provides enhanced flexibility in positioning and power transmission. The END20.20 limit switch is factory-integrated and matched to the motor. It ensures reliable shutoff at end positions and protects the system from overrun. With a protection rating of IP55, the drive is protected against dust and water jets. The permissible ambient temperature range is between –5 °C and +60 °C. This drive is ideal for greenhouse applications, particularly for controlling ventilation and shading systems. Note: The Lock EWA 52.6005 replaces the previous model EWA 14.6005 (12214.6005.66).