Hi All,
It's been a long time since the high school electronics classes doing circuit design.
I have a CNC router and need to connect up 2 Proximity Sensors to the one GPIO input. I have tried connecting them in series, but I am only getting a 12V trigger signal with 24V supply. So I thought I'd connect each of them up to a small 24V relay and wire them in series.
All well and good, except when I connect the sensor signal output to the relay I'm only getting 1.6v, instead of the 24V I see when it's not connected.
I have two types of NPN NO sensors
LJ8A3-2-Z/BX (this is the preferred sensor I'd like to use)
LJ12A3-4-Z/BX
I have two types of Relay. I'd prefer to go with the solid state
JW1FSN-DC24V
KG3RD50D2-12 (I tested this on using a 12V regulator on the 24V power for the proximity sensors, but I couldn't get these to work, so I reverted back to the mechanical relays)
Attached is a rough hand drawn sketch of what I have hooked up.
Any ideas what I am missing, or whether what I am trying to achieve is possible?
It's been a long time since the high school electronics classes doing circuit design.
I have a CNC router and need to connect up 2 Proximity Sensors to the one GPIO input. I have tried connecting them in series, but I am only getting a 12V trigger signal with 24V supply. So I thought I'd connect each of them up to a small 24V relay and wire them in series.
All well and good, except when I connect the sensor signal output to the relay I'm only getting 1.6v, instead of the 24V I see when it's not connected.
I have two types of NPN NO sensors
LJ8A3-2-Z/BX (this is the preferred sensor I'd like to use)
LJ12A3-4-Z/BX
I have two types of Relay. I'd prefer to go with the solid state
JW1FSN-DC24V
KG3RD50D2-12 (I tested this on using a 12V regulator on the 24V power for the proximity sensors, but I couldn't get these to work, so I reverted back to the mechanical relays)
Attached is a rough hand drawn sketch of what I have hooked up.
Any ideas what I am missing, or whether what I am trying to achieve is possible?
Attachments
-
175 KB Views: 22