Woodward SPM-A Synchronizer output
Woodward SPM-A Synchronizer output
(OP)
I have a Woodward SPM-A 9905-001 synchronizer on my system. I am trying to use one of the three outputs (Low Impedance, High Impedance or EPG) to send a signal to my engine control to speed up or slow down the generator.
I am having a heck of a time finding out what type of signal each of these outputs puts out. The vendor info does not specify what these signals are other than high impedance, low impedance.
I suspect that the signal is a +- 5VDC for +-3.5% speed change, but I'm not sure.
I also have a vendor looking into this, but not having much luck.
Anybody out there know what type of signal the synchronizer puts out? (Terminals 20-21 or 21-22 or 23-24)
For those of you who want to suggest for me to look at the Woodward manual #82384, I already have. It does not have the information I am looking for.
I am having a heck of a time finding out what type of signal each of these outputs puts out. The vendor info does not specify what these signals are other than high impedance, low impedance.
I suspect that the signal is a +- 5VDC for +-3.5% speed change, but I'm not sure.
I also have a vendor looking into this, but not having much luck.
Anybody out there know what type of signal the synchronizer puts out? (Terminals 20-21 or 21-22 or 23-24)
For those of you who want to suggest for me to look at the Woodward manual #82384, I already have. It does not have the information I am looking for.





RE: Woodward SPM-A Synchronizer output
Both synchronizers versions have three output options: high impedance, low
impedance, and EPG. Select the high impedance output for single-unit
synchronization when the engine is controlled by a Woodward 2301 control.
Select the low impedance output for single-unit synchronization when the engine
is controlled by a Woodward 2301A, 2500, or Electrically Powered Governor
(EPG) control through a Generator Load Sensor. Use the EPG output when using
a Woodward EPG control without load sensing.
from Page 2 of Manual 82384, I have Revision R.
Mike L.
RE: Woodward SPM-A Synchronizer output
The older 2301 was something close to 1VDC was about 1% speed change, but I not in the office and don't carry the old info around with me.
What governor do you have?
Mike L.
RE: Woodward SPM-A Synchronizer output
RE: Woodward SPM-A Synchronizer output
If you need a synchronizer with a broad application range and a direct 4-20mA output, use an SPM-D. I'm guessing you already have the SPM-A and are trying to upgrade or change existing? I think you'll find the cost of the SPM-D better than the time and effort you will spend trying to get the SPM-A to work, unless you're luckier than I am.
Mike L.
RE: Woodward SPM-A Synchronizer output
I will look into the SPM-D thanks!
RE: Woodward SPM-A Synchronizer output
Mike L.