SIRIUS 3RT2 contactors/contactor assemblies 
  2.5 Mounting 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
149 
2.5.1.3  Mounting on mounting plate 
The illustrations below show how contactors of sizes S00 and S0 are mounted on a 
mounting plate: 
Table 2- 19  Screw mounting for sizes S00 and S0 
Step  Operating instruction  Image 
1  Using two M4 screws (maximum tightening 
torque 1.2 to 1.6 Nm), plain washers, and 
spring washers, screw the contactor tight 
into the designated drill holes diagonally. 
You can use the 3RT1926-4P screw 
mounting adapter to make size S0 
contactors easier to mount, if necessary 
(e.g. in the case of vertical access when 
using an insulated screwdriver). These 
adapters can be rotated by 90° as you wish.
 
Screw mounting (size S00) 
Screw mounting (size S0)