Building Automation
Industrial Automation
Power Automation & Safety
Bangladesh Distributor
Question
Is there an easy way to check whether the control output of the Photomicro Sensors is operating properly?
Answer
The operation can be easily checked with the following procedure using a tester.
| Output method and checking procedure | Determination procedure | ||
NPN open-collector output  | A resistor is inserted between and OUT, and the voltagebetween OUT and  is measuredusing a tester. R: Approx. 4.7 kΩ, 1/2W | The control output is operating property it the measurement voltage changes to low and high by the lighting turning ON or OFF. (See note.) | |
| Output status | Text measurement voltage | ||
| NPN collector load built-in voltage output  | The voltage between OUT and is measured using a tester. R: Approx. 4.7 kΩ, 1/2W | ||
| Output transistor ON | L: 1 V max. (residual output voltage) | ||
PNP open-collector output  | A resistor is inserted between OUT and and the voltagebetween and OUT is measuredusing a tester. R: Approx. 4.7 kΩ, 1/2W | ||
| Output transistor OFF | H: Power supply voltage | ||
Note:This is a simple check that determines only whether the control output is malfunctioning.
E2E
FAQ
Top of page