ke6gwf
Member
Howdy Ya'all!
I got a couple of questions on the pinout for the interface connector for the A/B PLC 2/15 or 2/05 (should be the same).
First, what pins do the Transport Cable (I don't have the # handy) use to provide memory backup power?
I have tested and pulled the 2/15 apart, but can't trace, find continuity, or voltage on the 15 pin, that seems to match the Bat+ from the backplane. And I haven't been able to find the pinout from A/B. If I have to, I will find an unconnected pin (I think I saw at least one) on the 15 pin, and jumper it to the Bat+ line...
Second, what pins do the 25.5vdc EPROM programming PS 1771-P3? use, and is it just a straight PS, anotherwords, could I just put a couple of gel cells in series for 24vdc?
Also, one of my 1771-PA PS' died a couple of days ago. It was a hot day, and the PS is in an unvented cabinet. It did nothing, but when power was removed, the DC light would flash. Then I went to test it yesterday when it was cool, and it works fine. What should I look at as a bad/going bad component?
And finally, I am doing a project for my church involving interfacing the new DMX512 stage lighting system to the old 24v latching low voltage house lighting system, and unless I find an easy and cheap way to interface direct to the DMX, I am going to use a spare dimmer, and input it into one of my PLC 2/15 units to give single channel cascading control over house lights (10-15 circuits). So I need an Analog Input card. I will run a transformer off of the dimmer, so any voltage will work, as would an external 8-16 step A/D converter. (I have lots of AC input cards)
Price is key, since this a no-budget project. (read out-of-pocket)
I have seen them on Ebay before, almost won one a while back too, but all the ones I am seeing now are in the $2-300 starting range, and I need $20-30 range!
Thank you,
Ben Blackburn
Blackburn Services
Napa Valley, CA
[email protected]
I got a couple of questions on the pinout for the interface connector for the A/B PLC 2/15 or 2/05 (should be the same).
First, what pins do the Transport Cable (I don't have the # handy) use to provide memory backup power?
I have tested and pulled the 2/15 apart, but can't trace, find continuity, or voltage on the 15 pin, that seems to match the Bat+ from the backplane. And I haven't been able to find the pinout from A/B. If I have to, I will find an unconnected pin (I think I saw at least one) on the 15 pin, and jumper it to the Bat+ line...
Second, what pins do the 25.5vdc EPROM programming PS 1771-P3? use, and is it just a straight PS, anotherwords, could I just put a couple of gel cells in series for 24vdc?
Also, one of my 1771-PA PS' died a couple of days ago. It was a hot day, and the PS is in an unvented cabinet. It did nothing, but when power was removed, the DC light would flash. Then I went to test it yesterday when it was cool, and it works fine. What should I look at as a bad/going bad component?
And finally, I am doing a project for my church involving interfacing the new DMX512 stage lighting system to the old 24v latching low voltage house lighting system, and unless I find an easy and cheap way to interface direct to the DMX, I am going to use a spare dimmer, and input it into one of my PLC 2/15 units to give single channel cascading control over house lights (10-15 circuits). So I need an Analog Input card. I will run a transformer off of the dimmer, so any voltage will work, as would an external 8-16 step A/D converter. (I have lots of AC input cards)
Price is key, since this a no-budget project. (read out-of-pocket)
I have seen them on Ebay before, almost won one a while back too, but all the ones I am seeing now are in the $2-300 starting range, and I need $20-30 range!
Thank you,
Ben Blackburn
Blackburn Services
Napa Valley, CA
[email protected]
