描述
内部继电器数，有的称为标志位数，代表着PLC的内部继电器数。它与I/O继电器区相联系着，有时与后者相联系进行处理。内部继电器多，便于PLC建立复杂的时序关系，以实现多种多样的控制要求。一般讲，内部继电器数比I/O继电器要多得多。
NATIONAL INSTRUMENTS R1005050 182762B-01 NEW 182762B01
National Instruments SH100100 2-Meter E-Series Cable
National Instruments NI GPIB-120B Isolator and Expander
68 Pin Break w/F V Conn for National Instruments Qty 10
NATIONAL INSTRUMENTS SCXI-1326 TERMINAL BL0CK
NATIONAL INSTRUMENTS SCXI-1326 182245D01 Terminal Block
NI National Instruments AT-MIO-16E DAQ Card ++
National Instruments SC-2052 Cable Adapter – 32-pin IO
National Instruments NI SH100-100-F FLEX 185095-02 2 m
NATIONAL INSTRUMENTS PXI-1000B PXI MAINFRAME CHASSIS
NATIONAL INSTRUMENTS SCXI-1162HV 32-CHANNEL INPUT
