Emerson Exchange 365

Provox 120 VAC I/O to S-Series Mass Term Block

I am converting some Provox 120 VAC Inputs/Outputs to S-Series traditional I/O. What options do I have to get the 120 I/O in and out of the S series? I don't want to use the 8 channel 120 VAC cards due to burning up all of my carrier space. I'd like to use a 32 ch DC DI/DO with some sort of Phoenix Relay solution. We have some M-Series mass term blocks that use Phoenix relays to do what I want but I cant seem to find them in an S-Series.

Thanks

s_brwn

• 18 Aug 2020 6:31 PM
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6 Replies

• Lun.Raznik

  

  • 18 Aug 2020 6:38 PM

  Have you considered CHARMs IO?

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• Lun.Raznik

  

  • 18 Aug 2020 6:39 PM

  In reply to Lun.Raznik:

  PDS for S-Series mass connections options
  www.emerson.com/.../product-data-sheet-s-series-mass-connection-solutions-deltav-en-57658.pdf

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• Andre Dicaire

  

  • 18 Aug 2020 7:00 PM

  The mass termination with the field termination blocks give you 32 channels per card. The termination assemblies have options for the field wiring side. Provox AC signals wre wired with low side sensing which provides a more robust signal response. You will want to make sure you implement a similar design.
  
  On CHARMS IO, the original DI VAC isolated charm was connected to the standard terminal block on the high side, which left the + lead floating when the field contact was open. We found that when the field wiring was long enough, the signal might not drop out when the contact opened. Wiring the DI on the low side resulted in solid signal response and no more false positives.
  
  Emerson released the 3 wire DI Terminal Block which allows the CHARM to be connected on the low side of the circuit.
  
  The 32 channel DI cards are 24 VDC so you need to interpose these to the 120 VAC field. The termination assembly provides you with some options to accommodate the 120 IO onto the 24 VDC DI channels of the card through the mass termination terminal block.

  Andre Dicaire

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• s_brwn

  

  • 18 Aug 2020 7:50 PM

  In reply to Lun.Raznik:

  Yes. Charms def have their selling points. Cost prohibitive for our project based on quantity and how our existing is installed. Charms were 3X the cost and not able to save cabling or install costs since it's a retro and all the I/O is already in one room.

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• s_brwn

  

  • 18 Aug 2020 7:53 PM

  In reply to Lun.Raznik:

  Thank for the link to the doc. I have that one already. I haven't found anything that calls out specific part numbers for the relay term blocks at the I/O end of the cable. Maybe I have to get with Phoenix instead of local DeltaV Distribution. Thanks again

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• Andre Dicaire

  

  • 18 Aug 2020 9:16 PM

  In reply to s_brwn:

  My bad. The DI assembly does not indicate support of AC voltages. PDS is at link below. The 8 channel card is a low side sense circuit, but as you said, that would take 4 times the IO space. Phoenix may be your best option.
  
  www.emerson.com/.../product-data-sheet-s-series-mass-connection-solutions-deltav-en-57658.pdf

  Andre Dicaire

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