RET670 1MRK004816-AC | ABB| Oscillator input module

Description

RET670 1MRK004816-AC | ABB| Oscillator input module

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Among them, RET670 1MRK004816-AC is the oscillator input, OSOC is the oscillator output,/INT is the interrupt output (open drain; low level effective), ssV is grounded, SDA is the serial data I/O, SCL is the serial clock input, CLKOUT is the clock output (open drain), and DDV is the positive power supply.

The third terminal of the integrated comparator LM311 maintains a constant input voltage of 5V. Due to the proportional relationship between the sensor output current and the indoor gas (smoke) concentration, i.e. I=kC (where I is the sensor output current, C is the indoor gas concentration, and k is the proportional constant), the concentration can be converted into a voltage signal through the sensor and potentiometer 1R and input to the second terminal of LM311 (i.e. V=kC * 1R). A voltage comparator can convert analog signals into binary signals. LM311 is a universal integrated RET670 1MRK004816-AC with low open-loop gain, high offset voltage, and low common mode rejection ratio; But it has fast response speed, short transmission delay time, and can directly input high-level signals to the microcontroller. From the above analysis, it can be concluded that the resistance value of the potentiometer can be adjusted to adjust the upper limit of indoor alarm concentration.

Mailbox：sauldcsplc@gmail.com |RET670 1MRK004816-AC
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