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S-Series Devicenet

I have a question regarding S-Series carriers and what cards can be mixed on an 8 slot carrier.

Here is what I would like to accomplish.

I have back to back MMC’s on one Devicenet network and want to split them and add an additional Devicenet card.

(NODE4 controller) has five 8 slot carriers.  The first opening to install another Devicenet card is on a carrier with 120v DI cards all fed separately on their respective power bus plug.  I have no other carrier with an open slot providing 24vdc power to the carrier “AI’s and AO’s”. 

Can I install a Devicenet card onto a carrier with DI’s and feed it 24vdc on the power bus plug? 

Regards

Raymond

Raymond Pfister

• 21 Jul 2020 8:54 PM
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4 Replies

• YogBhagwat

  

  • 21 Jul 2020 9:19 PM

  Hi Raymond,
  This is what I can see in PDS.
  ntegrated power distribution. Controller and I/O interface
  power distribution is integrated into the carriers to reduce and
  simplify power and grounding. I/O Carriers have an integrated
  shield ground bar to isolate and drain field noise away from
  system power. They also provide an integrated redundant 24
  VDC bussed field power distribution to reduce installation
  wiring and provide fused, isolated power to each I/O interface,
  using Power Buss Plugs. Alternatively, the I/O carriers can be
  ordered with Power Terminal Plugs to bring dedicated power to
  each card, which can be either 24 VDC or 120/230 VAC. Power
  Buss Plugs and Power Terminal Plugs can be mixed on one
  I/O Carrier.
  A single Power Terminal Plug will come with any 120 VAC DI or
  120/230 VAC DO card.
  
  Product Description
  The S-series IO subsystem has been redesigned with a focus on
  fast assembly and simplified power connections. The system
  uses only 24 VDC bulk power supplies. All power is connected
  to system carriers. Bus connectors have been upgraded to
  support additional 12 VDC power to the IO cards, allowing
  additional power carriers to be inserted anywhere along
  the bus.
  Carriers mount to standard t-type DIN rail with latches that
  require no tools for quick installation. The latches can be
  released using a blade screw driver. Simply snap the carrier to
  the rail and slide adjacent carriers together to engage the
  bus connector.
  The I/O carrier supports 8 IO modules. Each card can be
  connected to an internal 24 VDC bus using the Power Buss
  Plugs, or it can be individually powered by using the Power
  Terminal Plugs. The internal 24 VDC bus is divided into primary
  and secondary power, with primary power distributed to odd
  numbered slots and redundant power distributed to even
  numbered slots using the Power Buss Plugs.
  hope this helps

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• Raymond Pfister

  

  • 21 Jul 2020 9:27 PM

  In reply to YogBhagwat:

  Thank You for the information. I understand now that I can feed the buss with 24vdc, install a devicenet card and still have 120vac DI cards using the power terminal plugs on the same carrier.

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• Andre Dicaire

  

  • 22 Jul 2020 3:55 PM

  In reply to Raymond Pfister:

  In BOL, the simplified circuit diagram shows that there is no connection to the 24 VDC field power of the Carrier. The card uses 12 VDC power on the IO power bus, which is supplied by the System power supplies. The Device net card requires no power from the individual slot power plug.
  
  DeviceNet field power is provided through separate bulk power supplies connected to the segment.
  
  In general, I avoid installing 24 VDC levels and bus communications in close proximity to unshielded AC signal wiring. One reason is to avoid issues with EMI negatively affecting the Bus communications, and secondly, avoiding having someone who is thinking about 24VDC and Bus level signals having their fingers and screw drivers in a 120 VDC wiring environment. But DeviceNet is an Electrician's protocol, and they are 120VDC savvy. If neither of these are a concern, then you can certainly install this card in the available slot.

  Andre Dicaire

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• Raymond Pfister

  

  • 22 Jul 2020 9:55 PM

  In reply to Andre Dicaire:

  Thank You Andre, we have taken precautions so that all devices are labeled with the appropriate hazards.
  
  Raymond

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