![background image](http://html.mh-extra.com/html/danfoss/fc-300/fc-300_design-manual_507599059.webp)
Figure 3.10: Figure of the essential aspects for installing a combination of a safe stop application and a MCB112 application. The diagram
shows a Restart input for the external Safety Device. This means that in this installation, par. 5-19
Terminal 37 Safe Stop
might be set to
value [7] or [8].
Parameter settings for external safety device in combination with MCB112
If MCB 112 is connected, then additional selections ([4] – [9]) become possible for par. 5-19 (Terminal 37 Safe Stop). Selection [1]* and [3] are still
available but are not to be used as those are for installations without MCB 112 or any external safety devices. If [1]* or [3] should be chosen by mistake
and MCB 112 is triggered, then the adjustable frequency drive will react with an alarm ”Dangerous Failure [A72]” and coast the drive safely, without
automatic restart. Selections [4] and [5] are not to be selected when an external safety device is used. Those selections are for when only the MCB 112
uses the safe stop. If selections [4] or [5] are chosen by mistake and the external safety device triggers safe stop, the adjustable frequency drive will
react with an alarm ”Dangerous Failure [A72]” and coast the drive safely, without automatic restart.
Selections [6] – [9] must be chosen for the combination of external safety device and MCB 112.
NOTE!
Note that selection [7] and [8] opens up for an automatic restart when the external safety device is de-activated again.
This is only allowed in the following cases:
1.
Unintended restart prevention is implemented by other parts of the safe stop installation.
2.
A presence in the hazard zone can be physically excluded when safe stop is not activated. In particular, the following paragraphs of standards
under the EU Machinery Directive must be observed: 5.2.1, 5.2.2, and 5.2.3. of EN954-1:1996 (or ISO 13849-1:2006), 4.11.3 and 4.11.4 of
EN292-2 (ISO 12100-2:2003).
See section Application Examples for further information.
FC 300 Design Guide
3 Introduction to AutomationDrive FC 300
MG.33.BC.22 - VLT
®
is a registered Danfoss trademark
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