本发明涉及一种用交流电的电子音乐门铃，由普通电子门铃加整流电源、继电器及功率放大器构成。本发明不再需要电池供电。
This AC electronic music door bell is composed of general electronic door bell, rectified power supply, relay and power amplifier and does not need battery to power it.
合上电梯供电开关，再分步控制柜内各控制回路电开关。检查所有电源电压和相序(相序继电器)是否正确。
Turn on the power switch, then turn on the switches in controller. Check phase and voltage.
31是一个简单的螺丝端子适用于接口应用线圈低压单稳态继电器(24V)和负荷在供电网络的电压(230 V)。
The 13.31 is a simple monostable relay with screw terminals suitable for interfacing applications where the coil is low-voltage (e. g. 24 v) and load is at the supply network voltage (230 v).
经过初步检查得知。灰色的为abs液压电动泵继电器，红色的为abs电磁阀继电器。是一种最常见的ABS系统的供电方式。
After a preliminary examination to know. Gray electric hydraulic pump for the ABS relay, the red relay for the ABS solenoid valve. Is one of the most common power supply ABS system.
经过初步检查得知。灰色的为abs液压电动泵继电器，红色的为abs电磁阀继电器。是一种最常见的ABS系统的供电方式。
After a preliminary examination to know. Gray electric hydraulic pump for the ABS relay, the red relay for the ABS solenoid valve. Is one of the most common power supply ABS system.
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