CI626A通訊模塊,CI626A控制系統(tǒng)
離散開關(guān)和負(fù)載通常是雙線設(shè)備。一般做法是終止
控制面板上的電線。CI626A 3BSE005029R1離散設(shè)備的一側(cè)通常是共用的電源或回路接頭
指向現(xiàn)場控制輸入/輸出接線板和輔助接線板連接點(diǎn)連接
提供足夠的位置來實(shí)現(xiàn)這一點(diǎn)。
輸出負(fù)載抑制
大多數(shù)固態(tài)控制包括輸出驅(qū)動器內(nèi)的負(fù)載抑制。交流固態(tài)繼電器
接近開關(guān)在低電流下關(guān)閉，并帶有一些內(nèi)部抑制。直流設(shè)備
CI626A通訊模塊
如果設(shè)備未包含，通常指定抑制。如果出現(xiàn)以下情況，則需要額外抑制：
要耗散的存儲負(fù)載能量超過模塊輸出的額定值
關(guān)閉放電時(shí)間內(nèi)的抑制器。
2、機(jī)械觸點(diǎn)與從動輸出線圈串聯(lián)使用。安裝其他
抑制，如串聯(lián)電阻電容器緩沖器，以抵消
通過外部觸點(diǎn)而非模塊切換線圈時(shí)發(fā)生。
Discrete switches and loads are usually two-wire devices. General practice is to terminate both
wires at the control panel. One side of discrete devices is usually a common supply or return tie
point. Field Control I/O Terminal Block and Auxiliary Terminal Block tie point connections
provide sufficient locations to accomplish this.
Suppression at the Output Load
Most solid state controls include load suppression within the output drive. AC solid state relays
and proximity switches turn off at low currents with some internal suppression. DC devices
usually specify suppression if not included with the device. Additional suppression is required if:
1.
The stored load energy to be dissipated exceeds the rating of the module's output
suppressor during the turn-off discharge time.
2.
A mechanical contact is used in series with a driven output coil. Install additional
suppression such as a series resistor-capacitor snubber to counteract electrical noise that
occurs when the coil is switched by the external contact instead of the module.
