Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Crystal oscillator

L0504-Murata muRata common mode inductor 90Ω 150mA

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Siemens s7-300 digital output module, the difference between thyristor output and transistor output, mainly in which aspects, which digital output module output can directly control contactor coil, solenoid valve coil, without intermediate relay Make a transition.
Answer: 1. The output module of Siemens plc has relay output, thyristor output, and transistor output. The difference between these three outputs is simply the form:

DC = transistor; AC = thyristor; AC / DC = relay;
Transistor output speed is fast, with DC load relay output switching frequency is lower than transistor, can be AC ​​load or DC load thyristor output can only have AC load, response speed between the first two

2, can not directly output depends on whether the power output of the module can meet your requirements, pay attention to the rated current and load. It is good to be able to load.
In general, in order to protect the module, it is necessary to add.
1. Relay output: The advantage is that different common points can have different AC and DC loads, and the voltage can be different, with load current up to 2A/point; but the relay output mode is not suitable for high-frequency action load, this It is determined by the life of the relay. Its life span decreases with the increase of load current, generally between hundreds of thousands of times to Jl million times, some companies can reach more than 10 million times, and the response time is 10ms.
2. SCR output: With load capacity of 0.2A / point, only with AC load, can adapt to high frequency action, response time is 1ms. .
3. Transistor output: The biggest advantage is that it is suitable for high frequency operation, and the response time is short, generally about 0.2ms, but it can only carry DC5-30V load, the maximum output load current is 0.5A/point, but every 4 The point must not be greater than 0.8A.
a. Relay: mechanical switch device, high noise, long reflection time, short life, suitable for high power, low frequency signal (220V, 380V AC and DC signal) switching; b. Transistor: electronic switching device, low noise, reflecting Short time, long life, suitable for small power switch signal transmission, can be used for high frequency pulse signal output; c. SCR: electronic switch device, low noise, fast reflection speed, long life, can withstand the transmission of high power signals task.