User Manual
  3SU18 enclosures 
  8.1 Enclosures for actuating and signaling elements 
SIRIUS ACT 3SU1 pushbuttons and signaling devices 
System Manual, 02/2015, A5E03457306020A/RS-AB/002 
151 
8.1.2
Mounting positions 
The mounting position of the contact modules or LED modules is specified by the 
combination of letters and numbers (permissible numbers: 1, 2, 3). 
The lowest mounting position of an actuating or signaling element is always A and the 
highest possible is F (for enclosures with 6 command points). This yields the following 
highest possible mounting positions, depending on the number of command points in the 
enclosure: 
●  Enclosures with 2 actuating or signaling elements ⇒ B 
●  Enclosures with 3 actuating or signaling elements ⇒ C 
●  Enclosures with 4 actuating or signaling elements ⇒ D 
●  Enclosures with 6 actuating or signaling elements ⇒ F 
Contact modules can be mounted at the mounting positions 1 and/or 2 and/or 3, but LED 
modules only at mounting position 3. 
Labeling for mounting positions in the enclosure lower part for enclosures with 1 to 6 
command points. 










