描述
开关量输出模块是将PLC内部低电压信号转换成驱动外部输出设备的开关信号，并实现PLC内外信号的电气隔离。选择时主要应考虑以下几个方面。继电器输出的价格便宜，既可以用于驱动交流负载，又可用于直流负载，而且适用的电压大小范围较宽、导通压降小，同时承受瞬时过电压和过电流的能力较强，但其属于有触点元件，动作速度较慢（驱动感性负载时，触点动作频率不得超过1Hz），寿命较短，可靠性较差，只能适用于不频繁通断的场合。
Newbridge / Alcatel RS-422 Card P/N: 90-1549-01
Expedited shipping available
Alcatel 690-3703-001 Conditioner Card N54N5465 w/ Wires
Expedited shipping available
ALCATEL ACL22 CPM CARD. Refurbished
Alcatel 628035-000-001 D448 POWER CONVERTER PCU CARD
Alcatel 3AL00294AA Vtg-301 Interface Card (SNCDTXECAA)
ALCATEL/NEWBRIDGE 90-0050-04/C CONTROL CARD
ALCATEL/NEWBRIDGE 90-0075-02B EXPANDER CARD
ALCATEL 300-1121-900-AS RPOTS LN CARD
Alcatel Audio Program Card PN: 690-0209-001, Rev. A
One-day shipping available
ALCATEL 300-1121-900-P RPOTS LINE CARD. REFURBISHED
Alcatel NewBridge OC12 IR card P/N: 90-2304-01/F
Alcatel 628492-025-001 Alarm & Ballast BD Circuit Card
Newbridge / Alcatel Switching Card P/N: 90-0639-03
Expedited shipping available
