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参数资料
| 型号： | XG2A |
| 元件分类： | 功率/信号继电器 |
| 英文描述： | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| 文件页数： | 16/16页 |
| 文件大小： | 1015K |
| 代理商： | XG2A |
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
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| XE4N | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.056A (COIL), 28VDC (COIL), 1568mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| XE4B | POWER/SIGNAL RELAY, DPDT, MOMENTARY, 0.096A (COIL), 12VDC (COIL), 1152mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
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相关代理商/技术参数 |
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|---|---|
| X-G2A | 制造商:Leach International Corporation 功能描述:EM RLY DPDT 5A 28VDC 500OHM SCKT - Bulk |
| XG2A1001 | 制造商:Omron Electronic Components LLC 功能描述:CONN IDC CONN F 10 POS 2.54MM IDT RA TH - Bulk 制造商:Omron Electronic Components LLC 功能描述:CONN SOCKET IDC 10POS .1X.1 |
| XG2A-1001 | 功能描述:集管和线壳 Connector w/Standard Terminal 10 Contacts RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
| XG2A1002 | 制造商:Omron Electronic Components LLC 功能描述:CONN IDC CONN M 10 POS 2.54MM IDT RA CBL MNT - Bulk 制造商:Omron Electronic Components LLC 功能描述:CONN SOCKET IDC 10POS .1X.1 |
| XG2A-1002 | 功能描述:集管和线壳 Connector w/Reverse Terminal 10 Contacts RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
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