Metal modular prewired switches NA-NB series
Main data
- Metal housing, cable output from right or from bottom
- 3 integrated cable types available
- Versions with M12 connector from right or from bottom suitable for safety applications
- Protection degree IP67
- 14 contact blocks available
- 36 actuators available
Switches with connectors
The new fundamental characteristic of these prewired switches series is the separation between the switch body and the wired connector. The connector allows the user to change a product in the field without having to completely remove the wires. Moreover this way it’s easier to assemble products with different cable types and lengths.
Reversible housing
The fixing holes and switch body shapes, added to the possibility of rotating the head, make this switch perfectly symmetrical. If it’s necessary to have the switch with cable output from left (the connector cannot be rotated), then it’s possible to rotate completely the device maintaining the final actuator position unchanged.
Positive opening contact blocks with 1-2-3-4 poles
These series contact blocks are versatile and compact. In the same space of the previous versions now it’s possible to have up to 4 different contacts, galvanically separated and provided with positive opening (NC contacts). The allowed standard combinations are 1NO+1NC, 2NC, 1NO+2NC, 2NO+2NC. Other combinations available by request. Contact blocks have been studied so that they maintain the same connections position in the connector independently of the type of action (slow, snap) and the number of contacts. Thus allowing the use of the same cable with connector both for slow action and snap action contacts without crossing wires, and, if needed, the use of cables fi t for more contacts (e.g. 2NO+2NC) also for fewer contacts (e.g. 1NO+1NC).
Increased or reduced actuating force
Based on the chosen actuator, many product variations are available. For actuators with revolving levers, versions with increased or reduced actuating force are available on request. This feature allows selection of a switch perfectly tailored for the application. For further information contact the Technical Department.
Unidirectional heads
All the switches with revolving levers are supplied with a selector which allows to choose the lever operating direction. The following operations are possible: right-left (industrial standard set up), only from right or only from left. You can select the directional operation by revolving a special ring nut inside this type of heads.
Adjustable levers
In switches with revolving lever it is possible to adjust the lever with 10° steps for the whole 360° range. The positive movement transmission is always guaranteed thanks to the particular geometrical coupling between the lever and the revolving shaft as prescribed for safety applications by the German standard BG-GS-ET-15.
Rotating heads
All the heads can rotate in 90° steps. The new head for revolving lever has been designed with dimensions contained inside the switch profile. This way it’s possible to install switches by the wall.
Overturning levers
The lever on switches can be fasten in straight or reverse side, maintaining the positive coupling. This way it’s possible to obtain two different work plans of the lever.
Adjustable cable output
The wired connector is provided with a notch to allow the cable bending up to 90°. Therefore it’s possible to install it by the wall and it’s easier to adjust the cable to the supporting flange.
Switch components available separately
This product series is designed in a modular format, so that its single pieces can be purchased separately. This is advantageous to distributors of electrical material for stock flexibility and final customers for spare parts or new combinations.
Adjustable levers with anti-vibration washer
Some applications present a problem due to fixing variations and carpentry laps. In other cases small final adjustments are needed owing to the application. The majority of revolving levers for NA, NB, NF series can be adjusted for extension at 1mm intervals.