SIRIUS 3RT2 contactors/contactor assemblies
2.7 Accessories
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
205
2.7.19 Pneumatic timer
2.7.19.1 Description
In terms of its function, the pneumatic timer 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 2- 58 Versions of the pneumatic timer
Version Adjustable time range Order number Circuit diagrams
0.1 to 30 s 3RT2926-2PA01 With ON-delay
1 to 60 s 3RT2926-2PA11


0.1 to 30 s 3RT2926-2PR01 With OFF-delay
1 to 60 s 3RT2926-2PR11


The pneumatic delay block is used if electronic components are not desirable or in the
absence of a control supply voltage.
2.7.19.2 Mounting/Disassembly
Table 2- 59 Mounting the pneumatic timer
Step Operating instruction Figure
1 Push the pneumatic timer, which is
attached on the front, into the location hole
on the contactor.
2 Pull the plunger out.
3 Pull the pneumatic timer down until it
engages.



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