Recent content by jfenwick

  1. jfenwick

    24V DC wire colors

    I guess the more direct question is: What colors should I use for 24+, 24-, and control on a floating 24V DC system?
  2. jfenwick

    24V DC wire colors

    I've been trying to understand what wire colors I should use for 24V in the US. Here are some pages that try to summarize: https://multilinedesigns.com/control-cabinet-standard-wire-colors/ https://www.eaton.com/ecm/groups/public/@pub/@europe/@Electrical/documents/content/pct_2930585.pdf I...
  3. jfenwick

    When does UL 508A apply?

    If I build a panel that is inside an enclosure that has a 120V AC cord going into a circuit breaker, which then feeds into a power supply that changes 120V AC to 24V DC, which then is fed to a bunch of 24V modules that do really simple things like data acquisition and send it out over the...
  4. jfenwick

    Passive Distribution Blocks

    I don't think you meant to reply to my thread. You need to start a new thread.
  5. jfenwick

    Passive Distribution Blocks

    This is an example of what I'm talking about: https://www.automationdirect.com/adc/shopping/catalog/wiring_solutions/circular_connection_cables/multi-port_distribution_blocks/8000-88590-0000000 What do people usually use this for? Like which protocols? Profibus? Modbus? DeviceNet? They often...
  6. jfenwick

    Cheap Modbus TCP module similar to STRIDE Field I/O?

    I did have those on my list to evaluate. The other thing I was looking at is the hardware from brainboxes. I feel like all of this hardware is more complicated and more expensive than it needs to be though.
  7. jfenwick

    Cheap Modbus TCP module similar to STRIDE Field I/O?

    The next level up seems to be Moxa E1200 Series but it costs about twice as much.
  8. jfenwick

    Cheap Modbus TCP module similar to STRIDE Field I/O?

    I've been using STRIDE Field I/O modules from AutomationDirect but they seem to have become unobtanium. https://www.automationdirect.com/adc/shopping/catalog/field_i-z-o/stride_i-z-o/analog_i-z-o/sio-mb04ads The features that I like about them is they are cheap, they can be configured over...
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