BERNSTEIN 188-U1ZDGKW 618.6127.742 Product Description

Overview

BERNSTEIN 188-U1ZDGKW 618.6127.742 is presented as a Bernstein I88 or 188 series limit position switch for industrial machine and equipment motion detection. The model code U1Z identifies the contact configuration, while DGKW and the article reference 618.6127.742 identify the actuator, enclosure or wiring variant. Public Bernstein and distributor records did not return a confirmed datasheet matching the complete 188-U1ZDGKW and 618.6127.742 reference; the description below uses public Bernstein I88/U1Z switch family data and marks variant-specific details as requiring verification against the switch nameplate or Bernstein document.

Features

Public Bernstein I88 U1Z switch references describe a 1 NO / 1 NC contact configuration with galvanically isolated changeover contact in type Zb arrangement. The switch is an insulation-enclosed position or limit switch with a self-extinguishing PA6 or thermoplastic enclosure and cover, and screw connections with self-lifting clamping plates. The actuator can be repositioned by four 90-degree adjustments, and terminal connection design follows DIN EN 50013.

For comparable Bernstein I88-U1Z switches, distributor data lists maximum AC contact current 3 A, maximum AC contact voltage 240 V and maximum operating force 12.5 N. Protection class is listed as IP65 to VDE 0470 T1, with M20 x 1.5 cable entry. The exact actuator type in the DGKW variant, contact current and voltage rating for the specific switch, enclosure material, cable entry orientation, lever or roller dimensions, mechanical life and operating temperature should be verified from the Bernstein datasheet or original switch label for 618.6127.742.

Specs

Brand: BERNSTEINSeries as presented: I88 / 188 limit or position switch Model: 188-U1ZDGKWArticle or order reference: 618.6127.742Contact family: 1 NO / 1 NC, galvanically isolated changeover contact, Zb type per comparable I88 U1Z data Actuator variant: DGKW; exact plunger, roller, lever or rod type unconfirmed Contact current: Comparable I88-U1Z reference maximum 3 A AC; verify exact switch rating Contact voltage: Comparable I88-U1Z reference maximum 240 V AC; verify exact switch rating Operating force: Comparable I88-U1Z reference maximum 12.5 N; verify exact switch rating Protection rating: Comparable I88 family reference IP65; verify exact variant rating Cable entry: Comparable I88 family reference M20 x 1.5; verify exact variant Enclosure: Comparable I88 reference thermoplastic or PA6 self-extinguishing enclosure Actuator adjustment: Repositionable by four 90-degree positions per comparable I88 data Product status: Legacy Bernstein limit switch spare for existing machine motion or position detection installations

Principle

A Bernstein position or limit switch detects mechanical movement by the actuator being depressed, rotated or contacted by a moving machine cam, lever or carriage. The actuator motion operates the internal contact mechanism, closing or opening the NO and NC contacts. The contact signals are wired to a PLC input, relay, safety circuit, motor starter or equipment control circuit to indicate machine position, end of travel, door or guard state, or to trigger a stop or interlock function.

The U1Z contact arrangement provides isolated NO and NC contacts, allowing different circuits or potentials to be switched within the same switch body. Replacement should verify the actuator style, contact configuration, contact rating, cable entry, mounting dimensions, operating force and switching direction against the original switch. Because safety-related limit switches may be used in guard, interlock or stop circuits, the replacement contact type and circuit arrangement should match the original machine safety documentation.

Applications

BERNSTEIN 188-U1ZDGKW would be used for machine limit position detection, travel end stopping, carriage or slide position sensing, door and guard interlocking, conveyor and production machine motion feedback, packaging machinery, material handling, machine tools, packaging lines, presses, elevators, hoists, tooling fixtures, process equipment and general industrial automation control. In existing Bernstein I88 or 188 switch installations, the unit serves as a replacement position switch spare matched to the original actuator, mounting hole pattern, contact wiring and control circuit.