Switch card specifications typically specify relay drive current rather than coil power.

开关卡的技术指标通常给出继电器的驱动电流值，而不是线圈功率。

youdao

Relay Drive Current. The amount of current necessary to energize a relay. Usually specified per channel.

继电器驱动电流激励继电器所需的电流总量。通常以每通道给出。

youdao

This charge transfer is due to the mechanical release or closure of the contacts, the contact-to-coil capacitance, and the stray capacitance between signal and relay drive lines.

这种电荷转移是由于触点的机械释放或闭合、“触点-线圈”电容以及信号和继电器驱动线路之间的寄生电容引起的。

youdao

You and I use it to get to work every day as a distributed network of hundreds of sensors relay vital information to the dashboards of the cars we drive.

FORBES: The Massive M2M Business Opportunity (Part 3)