1.1 INTRODUCTION

Contact blocks are an integral part of selector switches. The contact block can have normally open (NO) and/or normally closed (NC) configurations.

1.2 USES

Single circuits contain a contact block of either one normally open or one normally closed circuit. For applications that need only one contact, a single circuit is an efficient, inexpensive way to get the job done. Dual circuits offer two contacts in a single contact block. The combinations include:

1 normally open and 1 normally closed contact

2 normally open contacts

2 normally closed contacts

Combinations with special delayed opening or early closing contacts

Dual circuit contact blocks save space in enclosures and add twice the functionality to a switch because one switch operates two circuits. You can add multiple contact blocks to increase functionality. For example, you can mount 4 dual circuit blocks to a 30mm pushbutton for a total of 8 circuits.