I'm in the process of wiring my OBA and I am stuck. I'm not an electrical guy and don't know all the types of relays. Here are my parameters: Off at 125 psi (pressure switch), off in Drive or reverse, On in Neutral or Park, and On below 80 psi. I am planning on running my leads from the Neutral safety switch to a relay and then I imagine I'll need a relay coming from the pressure switch, but I'm lost as to how to combine the two relays. I thought that a latching relay might work for me, but I don't know and I'd like some advise. Maybe they have relays that will require two electrical imputs before switching over and will drop out if any of the two are lost? Thanks guys!
Relay question, latching or non latching?
- Thread starter 53guy
- Start date
Lou
NAXJA Forum User
- Location
- ToronNo/Hamilton
You should be able to do that with one 'regular' relay.
Post link, or info on pressure switch.
Post link, or info on pressure switch.
Air Compressor Pressure Switch, Pressure Range 70 to 150 PSIG, Set Differential Pressure 30 PSIG, Factory Off Preset 125 PSIG, Port 1/4 Inch NPSF, Enclosure NEMA 1, Poles 2, Contact Form Normally Closed, Diaphragm Actuated, Power Rating @ 115 VAC 1 1/2 HP, @ 230 VAC 2 HP, Contact Current Rating @ 115 VAC 17.2 Amps, @ 230 VAC 10.7 Amps, Manual Cut-Out Lever Grainger Item # 3AY90
Price (ea.) $26.75
Brand SQUARE D
Mfr. Model # 9013FHG12J52M1X
Catalog Page No. 1462
Grainger is gay, so all I can do it take a screen shot of it and post that up.
I want the compressor to cut off if I shift into drive, reverse, or hit my max psi and I'm kinda stuck there. I know how to wire it to come on or off when I shift out of Neutral or Park and I know how to wire it to come on and off with pressure, but how do I combine the two is my question.
Price (ea.) $26.75
Brand SQUARE D
Mfr. Model # 9013FHG12J52M1X
Catalog Page No. 1462
Grainger is gay, so all I can do it take a screen shot of it and post that up.
I want the compressor to cut off if I shift into drive, reverse, or hit my max psi and I'm kinda stuck there. I know how to wire it to come on or off when I shift out of Neutral or Park and I know how to wire it to come on and off with pressure, but how do I combine the two is my question.
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Lou
NAXJA Forum User
- Location
- ToronNo/Hamilton
short answer:
Each switch(shifter & pressure) drives one side of the relay's coil.
Since the Neutral/Park switch, contact B, goes to ground when engaged -- one side of the coil goes goes to that point.
The other side of the relay's coil goes to pressure switch. Other contact on the pressure switch goes to 12Volts.
Each switch(shifter & pressure) drives one side of the relay's coil.
Since the Neutral/Park switch, contact B, goes to ground when engaged -- one side of the coil goes goes to that point.
The other side of the relay's coil goes to pressure switch. Other contact on the pressure switch goes to 12Volts.
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