描述
外部DC24V电源若输入回路有DC24V供电的接近开关、光电开关等，而PLC上DC24V电源容量不够时，要从外部提供DC24V电源；但该电源的“—”端不要与PLC的DC24V的“—”端以及“COM”端相连，否则会影响PLC的运行。
NATIONAL INSTRUMENTS GPIB-SCSI-A CONTROLLER
National Instrument cFP-TC-120 and cFP-CB-3
National Instruments CB-2162 Proto VHDCI – FREE WW SHIP
National Instruments PCI-MIO-16E-1 / 6070E – NEW – 2010
National Instruments Terminal Base FP TB-10 Dual Ch
NATIONAL INSTRUMENTS PCI-6251 DATA ACQUISITION
National Instruments Digital I/O PC Card DAQCARD-DIO-24
National Instruments: 180950-01, SC-2070 Board, Rev. D
*NATIONAL INSTRUMENTS GPIB-422CT
National Instruments MXIbus Bulkhead Cable MB-4 66-PIN
National Instruments PCI-6713 NI DAQ Card Analog Output
VHDCI Breakout for National Instruments NI PCI-6229
