Palak
Aluminum
- Joined
- Jul 12, 2013
- Location
- Pacific NW
I want to wire into a CNC grinder a flame detector into the e-stop circuitry, such that when a flame is detected it shuts the grinder down and stops coolant flow.
The e-stop on this machine is a NC (normally closed) circuit, as per usual according to my understanding. We have a fire suppression system wired in, such that when the extinguisher goes off, it creates an open circuit, triggering the e-stop. We want to do the same thing for the flame detector (this is for redundancy).
The flame detector we have is a Det-Tronics PM-5MPX -- a detector commonly used in machining, according to their marketing materials. The wires into the detector are input power, power return, and 4 alarm out wires, as well as 2 trouble wires. So, the alarm switch appears to be normally open.
With the fire suppression, it was easy -- we have a single switch at the extinguisher, which is closed (held closed by the extinguisher pressure). We simply wire both ends of the switch in series in the e-stop circuitry.
But, I don't understand how I can incorporate the flame detector. In series, we would have a 24DCV input from the estop circuit, the return back to the circuit, but how do I get the alarm-out signal to create an open circuit when the flame detector is triggered.
FYI, the detector is potted, so no possibility of changing anything with the detector.
I am currently talking to "customer support", but they don't seem to know a lot about the product.
Would appreciate any thoughts.
The e-stop on this machine is a NC (normally closed) circuit, as per usual according to my understanding. We have a fire suppression system wired in, such that when the extinguisher goes off, it creates an open circuit, triggering the e-stop. We want to do the same thing for the flame detector (this is for redundancy).
The flame detector we have is a Det-Tronics PM-5MPX -- a detector commonly used in machining, according to their marketing materials. The wires into the detector are input power, power return, and 4 alarm out wires, as well as 2 trouble wires. So, the alarm switch appears to be normally open.
With the fire suppression, it was easy -- we have a single switch at the extinguisher, which is closed (held closed by the extinguisher pressure). We simply wire both ends of the switch in series in the e-stop circuitry.
But, I don't understand how I can incorporate the flame detector. In series, we would have a 24DCV input from the estop circuit, the return back to the circuit, but how do I get the alarm-out signal to create an open circuit when the flame detector is triggered.
FYI, the detector is potted, so no possibility of changing anything with the detector.
I am currently talking to "customer support", but they don't seem to know a lot about the product.
Would appreciate any thoughts.