rQx
Lifetime Supporting Member
Hi,
Had a discussion with a cunsultant about safety and he claimed that for example an Allen Bradley MC1 (two contacts) magnetical non-contact interlock switch is only allowed to be connected using both channels and NOT in a single channel system like PLc. Its B10d rating should only be for dual channel system and if you install it single channel you are not connecting it according to the manual. I think he is wrong, and also in the VDMA library for sistema is says.
2) This product has two electrical switching functional channels. The B10d data given for this product is based on a failure of either channel, which can be used to determine the MTTFd of a single channel.
Any input on this, or where he might have gotten this from? He says this applies to ALL interlock switches that have two channels
Had a discussion with a cunsultant about safety and he claimed that for example an Allen Bradley MC1 (two contacts) magnetical non-contact interlock switch is only allowed to be connected using both channels and NOT in a single channel system like PLc. Its B10d rating should only be for dual channel system and if you install it single channel you are not connecting it according to the manual. I think he is wrong, and also in the VDMA library for sistema is says.
2) This product has two electrical switching functional channels. The B10d data given for this product is based on a failure of either channel, which can be used to determine the MTTFd of a single channel.
Any input on this, or where he might have gotten this from? He says this applies to ALL interlock switches that have two channels