Siemens SIRIUS 3RT - Pneumatically Delayed Auxiliary Switch; Description

Accessories
9.21 Pneumatically delayed auxiliary switch
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
357
9.21
Pneumatically delayed auxiliary switch
9.21.1
Description
In terms of its function, the pneumatically delayed auxiliary switch is comparable with solid-
state time-delayed auxiliary switch blocks. It is available for 3RT2.2 (size S0) power
contactors in the following versions.
Table 9- 35 Versions of the pneumatically delayed auxiliary switch
Version
Adjustable time range
Article number
Circuit diagrams
ON-delay
0.1 to 30 s
3RT2926-2PA01
1 to 60 s 3RT2926-2PA11
With OFF-delay
0.1 to 30 s
3RT2926-2PR01
1 to 60 s 3RT2926-2PR11
The pneumatically delayed auxiliary switch block is used if electronic components are not
desirable or in the absence of a control supply voltage.