UFC760BE42 接口板

ABB接口板UFC760BE42

①额定工作电压：是指继电器正常工作时线圈所需要的电压。根据继电器的型号不同可以是交流电压，也可以是直流电压。
②直流电阻：是指继电器中线圈的直流电阻，可以通过万用表测量。
③吸合电流：是指继电器能够产生吸合动作的小电流。在正常使用时，给定的电流必须略大于吸合电流，这样继电器才能稳定地工作。而对于线圈所加的工作电压，一般不要超过额定工作电压的1.5倍，否则会产生较大的电流而把线圈烧毁。
④释放电流：是指继电器产生释放动作的大电流。当继电器吸合状态的电流减小到定程度时，继电器就会恢复到未通电的释放状态，这时的电流远远小于吸合电流。
⑤触点切换电压和电流：是指继电器允许加载的电压和电流。它决定了继电器能控制电压和电流的大小，使用时不能超过此值，否则很容易损坏继电器的触点。
继电器测试编辑
①测触点电阻：用万用表的电阻挡，测量常闭触点与动点电阻，其阻值应为0；而常开触点与动点的阻值就为无穷大。由此可以区别出那个是常闭触点，那个是常开触点。
②测线圈电阻：可用万用表R×10挡测量继电器线圈的阻值，从而判断该线圈是否存在着开路现象。
③测量吸合电压和吸合电流：用可调稳压电源和电流表，给继电器输入一组电压，且在供电回路中串入电流表进行监测。慢慢调高电源电压，听到继电器吸合的声音时，记录吸合电压和吸合电流。为求准确，可以尝试多次求平均值。
④测量释放电压和释放电流：也是像上述那样连接测试，当继电器发生吸合后，再逐渐降低供电电压，当听到继电器再次发生释放声音时，记下此时的电压和电流，亦可尝试多次而取得平均的释放电压和释放电流。一般情况下，继电器的释放电压为吸合电压的10%~50%如果释放电压大小(小于1/10的吸合电压)，则不能正常使用，这样会对电路的稳定性造成威胁，使工作不可靠。

UFC760BE42

ABB interface board UFC760BE42

① Rated working voltage: refers to the voltage required by the coil when the relay is working normally. Depending on the type of relay, it can be AC voltage or DC voltage.
② DC resistance: refers to the DC resistance of the coil in the relay, which can be measured by a multimeter.
③ Suction current: refers to the small current that the relay can produce suction action. In normal use, the given current must be slightly greater than the draw current for the relay to work stably. For the working voltage added to the coil, generally do not exceed 1.5 times the rated working voltage, otherwise it will produce a large current and burn the coil.
④ Release current: It refers to the large current generated by the relay to release the action. When the current in the draw state of the relay is reduced to a certain degree, the relay will return to the unpowered release state, and the current is far less than the draw current.
⑤ Contact switching voltage and current: refers to the voltage and current that the relay allows to load. It determines the size of the voltage and current that the relay can control, and cannot exceed this value when used, otherwise it is easy to damage the contact of the relay.
Relay test editing
① Measure contact resistance: use the electric barrier of a multimeter to measure the normally closed contact and moving point resistance, and the resistance value should be 0; The resistance of the normally open contact and the moving point is infinite. So you can tell that one is a normally closed contact and that one is a normally open contact.
② Measuring coil resistance: a multimeter R×10 can be used to measure the resistance of the relay coil, so as to determine whether there is an open circuit phenomenon in the coil.
③ Measure the suction voltage and suction current: with adjustable voltage regulator power supply and ammeter, input a group of voltage to the relay, and in the power supply loop into the ammeter for monitoring. Slowly increase the power supply voltage, and record the voltage and current of the relay when the sound is heard. For accuracy, you can try the average multiple times.
④ Measure the release voltage and release current: it is also connected to the test as above, when the relay draws, then gradually reduce the supply voltage, when you hear the release sound of the relay again, record the voltage and current at this time, you can also try many times to obtain the average release voltage and release current. Under normal circumstances, the release voltage of the relay is 10% to 50% of the pull voltage. If the release voltage is less than 1/10 of the pull voltage, it can not be used normally, which will threaten the stability of the circuit and make the work unreliable.

UFC760BE42