Key-operated switches - Import export

Remote controllers with key switches or with key switches and screen-displays for permanent 100 % security, used with all MedicCleanAir units. Remote controller RC 200 with key switches and screen-displays Integrated function keys for selecting mode. Constant pressure difference display. Illuminated display for operating data recognition. Key switch for secure functional change. Secure operation by qualified personnel only. Choice of incremental speed option. Setting for required pressure difference (automatic at Step 4 with ISO unit). Choice of filter test duration (for PRO air purification unit at level 4). Alarm function (visual and acoustic) for pressure difference. Alarm function (visual and acoustic) for filter condition.

NF EN ISO 14119 provides measures restricting the possibility of reasonably foreseeable fraudulent neutralization on locking devices. Some drawbacks The key does not provide inviolability. This system has problems related to minimum radius, alignment and breakage when operating the key. The switch often has only one door position contact and two locking contacts. For maximum performance level PL = e, a position sensor must be added with redundant outputs. This overburdens the wiring, occupying 4 inputs on a safety PLC.