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  1. I

    Digital input

    Hello, We have the following DI card from Siemens 6DL1131-6BL00-OPH1, which can have a 1 wire configuration. Can this card be wired to a 3 wire PNP sensor. With the 24v+ and 0v coming from a power supply and the signal going to an input channel? Thank you
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    ESD relay

    I believe it was just the way the client split the scope. The safety relays are in a panel separate from the MCC which we are supplying so it made sense to leave dry contacts for the MCC vendor to wire into. Thanks
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    ESD relay

    Hello, We have a few drives and DOL starters which will be provided by others( in an MCC)We will supply an ESD panel which will house a safety relay and expansion modules. The proposal is to leave dry contacts in the ESD panel for each of the drives/starters to be wired into. I assume that the...
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    Control panel surge protection

    Hello, I have a general question. If a control panel (plc modules etc) is powered from a ups source would it require a surge protector in the panel ? Thanks
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    Instrument cabling

    Thank you for the reply. Cheers
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    Instrument cabling

    Hi, With regards to instrument cabling ( PT,LT,FT etc) can anyone point me in the direction of information/ standards on how this is sized 0.5mm2 , 0.75mm2 , 1mm2 etc for a particular application. Thanks
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    Siemens Digital input

    Thanks for the replies. I agree that as long as we provide the +24v and oV and pick off a signal then this should input into the card with no issues. Thanks again
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    24vDC power supply

    Thanks for this power supply in this instance is Siemens Sitop 20A and instrument is E&H pro mass 300 and also a Siemens HMI
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    24vDC power supply

    Hello, I have a question about 24vDc powering instruments from a control panel. My question is why do we use a 2 core cable going to the device/instrument and do not provide a 3rd for for the earth connection like would be provided if the device was powered by AC single phase? Thanks
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    Siemens G120 Drive

    Again for your help
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    Siemens G120 Drive

    Sorry. Yes went through the manual and believe that STO would be best for our application as it is a category 0 Thanks
  12. I

    Cables for instrumentation

    Hello, I know that for 4-20ma transmitters twisted pair cable should be used with the screen grounded at one end only. However for digital signals ( limit switches , push buttons ) can 2 core/ part of a multi core cable be used ? Thanks
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    Siemens G120 Drive

    Thanks. I will look for the English version of this. Thanks again.
  14. I

    Siemens G120 Drive

    Sorry The manual I found was the first hit by searching Siemens PM330 it is 74 pages and around 2MB. It is too big to share. Can you post the name/description of the manual you have that goes up to over 500 pages Thanks
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    Siemens G120 Drive

    Sorry ground to terminal 7 not terminal 2
  16. I

    Siemens G120 Drive

    Thanks for this the original manual I was looking at had 98 pages and didn’t mention em stop. I am now looking at the pm330 manual and can see that we can use terminal 5 for a category 0. Just to be clear for this to operate would we would need to supply a voltage( say a permissive coming...
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    Siemens G120 Drive

    Hi with regards to the following drive Siemens g120(7.5kw) with control(start/stop, speed control) and feedback(running) through profinet would it be best to wire an emergency stop into the contactor upstream of the drive or does this drive have a specific remote em stop input that can be used ...
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    SPDT switch cable

    Hi, Sorry. These would be level switches. Endress and hauser fmr62. Thanks
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    SPDT switch cable

    Hi, Can the C and NC of a SPDT( 24vdc) switch be wired in 2 core cable or would it need to be a 3 core cable with one cable for earth ? Thank you
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    Multicore cable earth

    Thank you for this. As this is a push button station with simple NO push buttons I believe that cored cable instead of twisted pairs is a suitable choice. The client has no specific cable specs that I have seen. I was just curious that if the enclosure was earthed to steelwork then why the...
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