The PIC microcontroller has four oscillation modes to choose from. The oscillation mode is selected by the F0SC1 and F0SC0 bits of the configuration register CONFIG and written during EPROM programming.
Crystal Oscillator / Ceramic Oscillator:
In the XT, LP, and HS modes, a crystal or ceramic resonator is required to be connected to the OSC1/CLKIN and OSC2/CLKOUT pins of the microcontroller to establish oscillation, as shown in Figure 1. Resistor RS is often used to prevent the crystal from being overdriven. Under crystal oscillation, the resistance RF ≈ 10 MΩ. For crystal oscillators above 32KHz, when VDD>4.5V, it is recommended that C1=C2≈30PF. (C1: phase adjustment capacitor; C2: gain adjustment capacitor.)
Table 1: Oscillator Type Selection
F0SC1 | F0SC0 | Oscillation mode |
0 | 0 | Low Power Oscillation LP (Low Power) |
0 | 1 | Standard crystal oscillation XT (Crystal/Resonator) |
1 | 0 | High Speed ​​Crystal Oscillation HS (High Speed) |
1 | 1 | Resistor oscillating RC (Resistor/CaPACitor |
Super AC Contactor is exactly copy schneider newest model.The up parts and base will be easy opened to change the coils. On the top of Magnetic AC Contactors, there is a transparent cover for dust improved purpose.
Super AC Contactor is suitable for using in the circuits up to the rated voltage 660V AC 50Hz or 60Hz,rated current 95A.It's mainly used for making and breaking electric circuits at a long distance and for frequent starting/stopping & controlling AC motors. Combined with the auxiliary contact group,air delayer,machine interlocking devence etc,it is combined into the delay contactor,mechanical interlocking device etc,it is combined into the delay contactor,mechanical interlocking contactor,startriangle starter,with the thermal relay,it is combined into the electromagnetic starer.
Super AC Contactor,Electric Magnetic Contactor,Alternating Current Contactor,AC Contactor Alternating Current
Ningbo Bond Industrial Electric Co., Ltd. , https://www.bondelectro.com