70    HC900 Process & Safety Controller User and Installation Manual  Revision 6 
    21 April 2017 
Assemble Controller Rack 
C30/C50/C70 Controller Rack assembly information is given in Table 9. 
C75 Controller Rack assembly information is given in Table 10. 
Table 9 – Assemble C30/C50/C70 Controller Rack 
Carefully place the Power 
Supply in the leftmost slot in 
the Rack, ensuring that the 
connector at the back seats 
properly. 
Insert a slot screwdriver in 
the slots at the top and 
bottom of the power supply 
cover while pulling backward 
to open the cover. 
Fasten the screws (captured 
in the face of the power 
supply) into the tabs at top 
and bottom of the rack. 
Torque to 0,4-0,5 N.m 
(3.5 – 4.4 Lb-In). 
 
 Ensure that wiring to the Power Supply is disconnected from the site AC source before 
installing wiring. 
 Do not remove Yellow/Green wire from grounding stud on the power supply. 
Failure to comply with these instructions could result in death or serious injury.