Where is the PWM pin on a 4 wire fan?
Intel specification (July 2004, Rev 1.2) defines the intended operation of a fan that implements the Pulse Width Modulation (PWM) control signal on the 4-wire fan interface. The following requirements are measured at the PWM (control) pin of the fan cable connector:
What kind of wire is used to turn on a fan?
SIGNAL CIRCUIT 12V SWITCHED (IGNITION OR FUSE PANEL) Power “ON” when key is in the “RUN” position. 1ST RELAY TURNS ON FAN WHEN TEMP SENSOR IS ACTIVATED BATTERY 86 30 87 85 12V SWITCHED WIRE TO GREEN WIRE AT A/C CLUTCH. NOTE: OR IN AN ’84 TO ‘89 240 YOU MAY USE THE A/C POWER ‘ON’ WIRE: RED/WHITE WIRE AT AC SWITCH MICROSWITCH IN DASH.
How does a 3 wire fan monitor work?
In a 3-wire fan, first two wires are the power supply wires of the fan. The third wire, comes directly from the output of the built-in ‘Hall Sensor’ chip generates output pulses during the fan rotation. With the help of this third wire, a monitoring circuit can ‘see’ the rotation.
How are end of line resistors used in alarm systems?
The main focus of the video is going to be on single end of line resistors, as those are the most commonly used. But we’ll also talk about advanced resistor uses, putting an end of line resistor in a can, doubling the line resistors, and I’ll briefly touch on zone doubling, as well.
SIGNAL CIRCUIT 12V SWITCHED (IGNITION OR FUSE PANEL) Power “ON” when key is in the “RUN” position. 1ST RELAY TURNS ON FAN WHEN TEMP SENSOR IS ACTIVATED BATTERY 86 30 87 85 12V SWITCHED WIRE TO GREEN WIRE AT A/C CLUTCH. NOTE: OR IN AN ’84 TO ‘89 240 YOU MAY USE THE A/C POWER ‘ON’ WIRE: RED/WHITE WIRE AT AC SWITCH MICROSWITCH IN DASH.
The main focus of the video is going to be on single end of line resistors, as those are the most commonly used. But we’ll also talk about advanced resistor uses, putting an end of line resistor in a can, doubling the line resistors, and I’ll briefly touch on zone doubling, as well.
Where is the fuse on an electric fan relay?
The orange wire on the relay should see a 12 volt signal when the ignition switch is turned on. The other two wires on the relay are the meat and potatoes of the system, with the yellow wire connecting to the battery along with the supplied fuse mounted within 12 inches of the battery.
Why does an end of line resistor show zero ohms?
When it’s open, again, it will show infinite ohms because the electricity is not making it back to the panel. Now if there’s a short anywhere along the wiring, it’ll travel to that short and then back to the panel. It won’t travel to the resistor, and so it will show zero ohms of resistance.