/members-area/personalblogs/b/blog/posts/the-great-cnmb-boss-questionFollowing on from my recent blog post about my most common question (terminal blocks for the CNMB din rail enclosure), I was reminded recently of another common one.The CamdenBoss CNMB DIN rail enclosure has a base which clips to the DIN rail (it canen-USTelligent Community 12https://community.element14.com/members-area/personalblogs/b/blog/posts/the-great-cnmb-boss-questionSat, 19 May 2012 18:05:18 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ae81925e-ddf6-49ba-89e7-e703e8d4ad73M_B0<p>Following on from an inquiry earlier this week, I must tell you the boss can be useful after all - when using a heavy PCB. For example on a wider lenclosure, such as a size 6 CNMB, with components like transformers, chokes etc. If you don&#39;t screw down the PCB, the PCB might be pressing against the top part of the box and effectively &quot;floating&quot; above the base. If the box is box gets knocked about, there is a danger that the momentum of the PCB floating around causes sufficient force to pop the front off the box. Compare that with the scenario of the PCB being screwed down. Now the PCB is effectively tied down to the DIN rail (the base is firmly clipped on). No floating, no force pressing against the lid.</p><img src="https://community.element14.com/aggbug?PostID=13368&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">