- 您现在的位置：买卖IC网 > PDF目录205969 > XCD7N POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT PDF资料下载
参数资料
| 型号： | XCD7N |
| 元件分类： | 功率/信号继电器 |
| 英文描述： | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| 文件页数： | 14/14页 |
| 文件大小： | 2057K |
| 代理商： | XCD7N |
Application notes
N°007
SUPPRESSOR DEVICES FOR RELAY COILS
The inductive nature of relay coils allows them to create magnetic forces which are converted to mechanical movements to
operate contact systems. When voltage is applied to a coil, the resulting current generates a magnetic flux, creating
mechanical work. Upon deenergizing the coil, the collapasing magnetic field induces a reverse voltage (also known as back
EMF) which tends to maintain current flow in the coil. The induced voltage level mainly depends on the duration of the
deenergization. The faster the switch-off, the higher the induced voltage.
All coil suppression networks are based on a reduction of speed of current decay. This reduction may also slow down the
opening of contacts, adversly effecting contact life and reliability. Therefore, it is very important to have a clear understanding
of these phenomena when designing a coil suppression circuitry.
Typical coil characteristics
On the graph below, the upper record shows the contacts state. (High level NO contacts closed, low level NC contacts closed,
intermediate state contact transfer). The lower record shows the voltage across the coil when the current is switched off by
another relay contact.
The surge voltage is limited to -300V by the arc generated across contact poles. Discharge duration is about 200
mircoseconds after which the current change does not generate sufficient voltage. The voltage decreases to the point where
the contacts start to move, at this time, the voltage increases due to the energy contained in the NO contact springs. The
voltage decreases again during transfer, and increases once more when the magnetic circuit is closed on permanent magnet.
Operating times are as follows:
Time to start the movement 1.5ms
Total motion time 2.3ms
Transfer time 1.4ms
Contact State
Date of issue: 6/00
- 8 -
Page 1 of 4
相关PDF资料 |
PDF描述 |
|---|---|
| XCD7R | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.096A (COIL), 12VDC (COIL), 1152mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCD7V | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.3A (COIL), 6VDC (COIL), 1800mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCE1A | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCE1B | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.096A (COIL), 12VDC (COIL), 1152mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XCE1C | POWER/SIGNAL RELAY, SPDT, MOMENTARY, 0.3A (COIL), 6VDC (COIL), 1800mW (COIL), 10A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XCDC01 | 制造商:Excelsys Technologies 功能描述:CONF POWER CHASSIS 1200W 6 SLOT |
| XCDMTWRK1 | 制造商:Intel 功能描述: |
| XCDN0000 | 制造商:Red Lion Controls 功能描述:OPTION CARD, DSP/MC DEVICENET 制造商:Red Lion Controls 功能描述:DSP/MC DEVICENET OPTION CARD |
| XCDP-GLX044-21051 | 制造商:SMART Modular Technology Inc 功能描述:XCEEDPC/GEODE EMBEDDED PC - Trays |
| XCDP-GLX-OSWXPP | 制造商:SMART Modular Technology Inc 功能描述:OS: WINDOWS XP PRO - Trays |
发布紧急采购，3分钟左右您将得到回复。