PoE?

Digi One IA/IAP
21

How will this change?

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This isn’t a software issue - it is hardware.

As of today, we should have a NEW version of the Digi One IAP hardware out in Jan 2007 (or Feb 2007). This is mainly to design out some end-of-life’d components, but does include some general fixes or improvements.

Changes:

  1. For better or worse, the NEW hardware will remove the PoE from the standard DOIAP and a 2nd product likely called Digi One IAP PlusPower will have the newer PoE design supporting either end or mid-span. I don’t know the exact new product names, prices, or model numbers.

  2. The input DC-to-DC power isolator has been changed to have no inrush current, so you should be able to use the small 7watt 24vdc DIN-rail supplies from someone like Omron or Idec. The older design had enough inrush to normally cause these small supplies to treat as a short-circuit.

  3. The serial lines will inherit true transient surge diodes with defined IEC-waveform specs. The old hardware had better over-voltage protection than standard Digi products but the exact spec was fuzzy.

  4. The GoodLink LED will become “normal” - Green means GoodLink and dark means none. The old design (for legacy reasons) was dark means good and RED mean no-link.

  5. The way the 2 ports verse 1 port will change slightly - the old hardware used a dual 232/485 chip which turned out to be too expensive and didn’t support its own published spec! For example, applying a +12.1v signal to an RS-232 input caused it to latch up and start heating. That is not good; one wonders why the chip maker didn’t handle this. So the new design uses better (and more standard) RS-232 and 485 chips.