描述
在程序组态设计中,一定要采用保障机组安全运行控制策略。保护或连锁的逻辑判据必须是充要的。对汽轮机转速、汽轮机润滑油压力等,宜采用硬接线保护和软件保护相结合,建议采用常闭信号,以确保保护的可靠投入;对重要的三取二保护信号,要采用模拟量和开关量进行组合,在保证重要主设备安全的前提下,建议尽可能采用常开信号,以避免保护的误动作;
Symbol Motorola MC9090-K Excellent Condition, Orig Box
Expedited shipping available
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Symbol or Motorola MC9060 MC 9060-G MC 9060
w/ wrnty & bat !! other configs in hse. quantites avail
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Motorola Symbol Barcode Scanner LS3478 USB Wireles NEW
Motorola Symbol VRC6940-00V651US Barcode Terminal Scann
SYMBOL, MOTOROLA MC7090-PK0DJQFA8WR, WM5.0, WiFi !!!!!
CHARGING AND COMMUNICATION CABLE KIT INCLUDED MINT !!