描述
分时分组输入。一般系统中设有“自动”和“手动”两种工作方式，两种方式不会同时执行。将两种方式的输入分组，从而减少实际输入点。如图1所示。PLC通过I1.0识别“手动”和“自动”，从而执行手动程序或自动程序。图中的二极管用来切断寄生电路。若图中没有二极管，转换开关在“自动”，S1、S2、S3闭合，S4断开，这时电流从L+端子流出，经S3、S1、S2形成的寄生回路电流流入I0.1，使I0.1错误的变为ON。各开关串如入二极管后，则切断寄生回路。
PPC/PMC-8260 MPMC8260 01-W3514F-01E 01-W3628F-01A
SCSI Hard Disk Seagate ST34572W 9J6002-010 A-02-9847-2
486 Motherboard MiniEISA-486AS EISA DX4-100 32 MB 256K
07L9196 IBM Dual CPU Card 35L0817 Gemini DD5.0
09P1162 18P1471 18P1470 34L9618 SM390HGSFN30G20 IBM
ASUS P/I-P6NP5 Pentium Pro MediaBus Motherboard Rev1.41
ASUS P/I-P6NP5 Pentium Pro MediaBus Motherboard Rev1.3
Octal II Card SULCUS Squirrel POS D71051C 8-Port Serial
Data Translation 05206 DT26216-SE DT5727-SE-PGH ISA Crd
DigiChannel Connection Box PC/16i MC/16i 16 DB25
Motherboard Super Socket7 ASUS * P5A-B * 1.03/500/sound
486 Motherboard Small Tiny Zida Tomato 4DPS 2.1 PCI SIS
Motherboard Pentium Soyo SY-5EH ETEQ AGP ISA S-Socket7
Motherboard Pentium QDI P51430HX-280T2 Frontier I V1.0
Motherboard Athlon Skt AM2 ASUS M2N-E w/ 64 X2 3800 CPU
Matrox MGA-MYST/RRSTC MY220P/BYZ4C Rainbow Runner
Base Systems Motherboard V20 Turbo 12MHz IBM PC/XT 1.44
