ESS32S2 datasheet(72/124 Pages) SCHMERSAL

72 / 124 page

Command and signalling devices

Contact and lighting elements

Area of application

The Schmersal Group has developed its own contact systems for series E, N and R command

and signalling devices, which guarantee exceptional contacting even under the harshest ambient

conditions.

The command and signalling devices from the Avantgarde range are specially designed for the

needs of industrial applications. Quick efficient installation of the device with a knurled nut. A

contact carrier has been integrated directly on the command device so that the contact elements

can be pushed on and engaged on the command device easily without an additional mounting

flange. Also the contact elements are easy to install with a screwdriver or to remove with the

removing tool. This reduces expensive installation time to a minimum.

Design and

way of functioning

All the elements of the EF system have a special low-voltage-capable and self-cleaning four-way

contact bridge system. This is a twin contact bridge that works in-parallel as well as crosswise.

In this way, the fixed contact and the moveable contact bridge always achieve several contacts.

This ensures high levels of contact security that is enhanced by the shape of the fixed contacts.

Apart from this, the contacts have a self-cleaning function that removes oxide and dirt particles

before they are deposited and are able to affect operation of the switchgear.

The EF contact system can be supplied in four terminations:

■ Screw terminals

■ Cage clamp

■ Blade terminal

■ Direct mounting on PCB

The RF contact system is used with series R command devices. Installation is particularly user-

friendly as the RF contact system's mounting flange comprises of two parts and allows users to

pre-mount the contact elements, while the other part is used for fastening the device head and

subsequent attachment of the contact carrier. With this contact system, users have a free choice

of contacts, since the contact elements can be mounted on two levels.

The contact element of the type AF is specially designed for a time-saving device installation.

Thanks to the recessed guide rails, they are connected directly to the command device without a

contact carrier or similar. Thanks to the omission of an attachment or mounting flange, a very low

installation depth of under 40 mm is also achieved (emergency stop 47 mm).

Also the AF contact system is a modular contact system, that due to the doubling of the contacts

can accept up to five contact elements (different with emergency stop). This offers the machine

and plant manufacturer the possibility to decide how many NO or NC contacts are to be used and

installed. This modular contact system also contributes to a reduction in costs. Emergency stop

command devices can accept up to three contact elements. These are secured against popping

off with an additional safety plate.

ESS32S2 Datasheet(PDF) 72 Page - K.A. Schmersal GmbH & Co. KG