NEx V

Housing

• Housing and hood made of corrosion-resistant gravity die-cast aluminium
• Coated with silicon-free paint
• Colour: RAL 7032 Pebble Grey
• The motor compartment is designed as a type “d” flameproof enclosure to DIN EN 60079-1.
• Protection class IP66/67
• Options:
  – Sonderfarben

Synchronous motor

• Single-phase AC synchronous motor with permanent magnets, reversible
• 230 V ± 10%, 50/60 Hz ± 5%
• ON time 100% duty cycle on request
• Short start/stop times
• Insulation class B to VDE 0530
• Synchronous motors maintain speed and constant positioning times irrespective of the load
• Options:
  – Custom voltages
  – Custom frequencies

BLDC motor

• Brushless DC motor
• Constant positioning time thanks to electronic speed controller
• Wide-range input 90 V AC … 264 V AC, 120 V DC … 370 V DC
• High holding torque when operating voltage applied
• Manufacturer configured start-up and brake ramp
• ON time 100% duty cycle
• Insulation class B to VDE 0530

DC motor

• DC commutator motor
• Voltage: 12 V DC or 24 V DC
• Insulation class E to VDE 0530

Gearbox

• Spur gearing with straight-toothed steel gears
• Robust, maintenance-free
• Permanently lubricated gears
• Self-lubricating sintered bronze bearing
• Encapsulated version, operates in any position

Spindle

• Self-locking
• “Open/Closed” markings indicate position
• Made of stainless steel

Electrical connection

• Connection by means of 1 m cable end or Ex “e” rated terminal box with tension clamp terminals
• Customer-side wiring outside of the flameproof housing
• Electric anti-condensate heater
• Manual reset temperature switch 80 °C

Controls

• Open/closed signal
• Options:
  – Additional potential-free contacts
  – Electronic position controller ESR-N with Profibus and USB interfaces for synchronous motors
  – Potentiometer 200 Ω … 10 kΩ
  – Blocking protection assured by monitoring changes to actual value of the potentiometer (only in conjunction with position controller ESR-N)

Ambient temperature

• -20 °C to +60 °C

Regulating distance limited by force-sensitive snap-action position off switch

• CO switches with silver-plated contacts
• Switch connections routed to terminals
• Max. switching capacity: 6 A, 250 V AC
• Options:
  – Switches with gold-plated contacts
  – Switches with positive-break contacts

Position sensor for external position indication (optional)

• With potentiometer
  – Conductive plastic potentiometer (standard) or wire-wound potentiometer (including TUV approval)
  – Multiturn potentiometer up to 10 turns
  – Gearing facilitates adapting the electrical angle of rotation of the potentiometer to the desired linear regulating distance of the actuator.
• With 4 … 20 mA transmitter
  – Gearing facilitates adapting the electrical angle of rotation of the transmitter to the desired linear regulating distance of the actuator.
• With Hall sensor
  – The wear-free absolute encoder that makes use of the Hall effect is particularly suitable for continuous operation in potentially explosive atmospheres.

Manual operation (optional)

• Using a handwheel it is possible to manually adjust the position of the output shaft and valves.
• Position switch-off settings are retained during manual operation.
• Handwheel remains motionless during electrically powered operation.

Options

• Other voltage/frequency
• Handwheel
• Additional auxiliary position switches
• Custom control cams
• Electronic position controller ESR-N (in conjunction with synchronous motor)
• Position sensor
• Relay to switch several actuators in parallel
• Potentiometer
• Components to UL standard
• Encapsulated stroke unit
• Set collars serve as external travel stops
• Easy to mount thanks to modified column adapters/flanges
• Easily coupled to the spindle nut by means of a wide variety of threaded, through hole and split driving collars

Safety instructions

Ensure the device is isolated from the power supply before the hood of the flameproof encapsulated housing is opened by a skilled tradesperson in a hazardous area. It is imperative to observe the wait time stated on the rating plate!