Блоки вспомогательных контактов Siemens
![](https://pzip.ru/Images/Siemens/cat/G_NSA0_XX_00582i.jpg)
Обзор
Auxiliary switch: Terminal designations and identification numbers for auxiliary contacts
Terminal designations
The terminal designations are 2-digit, e.g. 13, 14, 21, 22:
- Tens digit: Sequence digit
- Related terminals have the same sequence digit
- Units digit: Function digit
- 1-2 for normally closed contacts (NC)
- 3-4 for normally open contacts (NO)
Identification numbers
The Ident. No. indicates the number and type of auxiliary contacts, e. g. 40, 31, 22, 13:
- 1st digit: number of normally open contacts (NO)
- 2nd digit: number of normally closed contacts (NC)
Examples:
- 31 = 3 NO + 1 NC
- 40 = 4 NO
Selection aid for mountable auxiliary switch blocks for power contactors and contactor relays
Selection aid see PDF below.