Description
TER Top Rotary Limit Switch is used to control and measure the movement of industrial machines or the position of the nacelle or pitch angle of wind turbines. It is saline fog resistant and has many options. Top Rotary Limit switch is designed to meet the most demanding requirements.
FEATURES
- It consists of a gear motor that transfers movement to the cams and the other movement detection devices through a primary input reduction stage (worm gear and helical toothed gear) and one or more secondary output stages (pairs of straight toothed gears).
- Accurate adjustment of cams by means of screws.
- Positive opening NC contacts for safety functions.
- Mechanical life of switches: up to 10 million operations.
- IP protection degree: Top is classified IP66, IP67 and IP69K.
- NEMA protection degree: Top is classified Type 4X*.
- Extreme temperature resistance: -40°C to +80°C.
- Saline fog resistant.
- It features base and cover made of electrostatic varnished die-cast aluminium, transmission and gear driving shafts made of stainless steel AISI 303, worm gear transmission shaft rotating on ball bearings, self-lubricating technopolymer gears and driving bushes.
- All materials and components used are wear resistant and guarantee protection of the unit against water and dust.
OPTIONS
- Revolution ratios from 1:1 to 1:8100, achieved by combining different secondary output stages.
- Each of the three outputs can be set to a different revolution ratio to enable diversified control of the machine when special requirements need to be met.
- Snap action switches with 1NO+1NC change-over contacts or slow action switches with 1 NC contact.
- It can be equipped with 3 cam sets (with up to 15 switches), potentiometers and encoders (alone or on top of cam sets with up to 2 switches) and Yankee absolute encoders (on top of cam sets with up to 4 switches).
- XL version featuring cover rise available with 3 cam sets (with up to 18 switches), potentiometers and encoders (alone or on top of cam sets with up to 5 switches) and Yankee absolute encoders (on top of cam sets with up to 6 switches).
- Dedicated cable clamps or connectors.
- Available with flanges, pinions and couplings.
- Plates with universal adapter to replace existing systems.
TER has acquired decades of experience in designing and manufacturing rotary limit switches, providing now four series of rotary limit switches, used to control the movement of industrial machinery when in need of measuring the movement on the basis of the rotation angle and/or of the number of shaft revolutions.
The rotary limit switches are used in particular in industrial and construction lifting plants to control gantry cranes, track cranes, jib cranes, wall-mounted jib cranes, tower cranes and winches for construction sites; in the automation industry to command and control systems to manage machines and processes, thus reducing the need for human intervention; in stage technology to control the equipment used to move stage sets, curtains etc.; on wind turbines for managing and controlling the pitch angle of the blades (pitch control) and the position of the nacelle (yaw control).
TER range of rotary limit switches includes four series of limit switches, with revolution ratios ranging from 1:1 to 1:8100 and up to 15 microswitches with potentiometers and encoders.
The rotary limit switch is made up by a gearmotor which transfers the movement to the cams and to the other movement detection devices placed inside it through a primary input reduction step (worm gear and helical toothed gear) and one or more secondary output steps (pairs of straight toothed gears).
TER’s aim is to simplify the control of the machines equipped with its devices, designing reliable, ergonomic and intuitive safety products, capable of predicting the demands of the market and becoming the industry benchmark.
At the basis of this company mission is the will to establish a connection between market and company, by giving an increasingly central role to the sales department, seen as a continuous relationship between TER and its customers.
