1769-OF8V
1769-OF8V

一般认为输入点数是按系统输入信号的数量来确定的。但在实际应用中，通过以下措施可达到节省PLC输入点数的目的，下面以FX1N系列PLC来介绍。

（1）分组输入  如图1所示，系统有“手动"和“自动"两种工作方式。用X000来识别使用“自动"还是“手动"操作信号，“手动"时的输入信号为SB0～SB3，“自动"时的输入信号为S0～S3，如果按正常的设计思路，那么需要X000～X007一共8个输入点，若按图1的方法来设计，则只需X001～X004一共4个输入点。图中的二极管用来切断寄生电路。如果图中没有二极管，系统处于自动状态，SB0、SB1、S0闭合S1断开，这时电流从COM端子流出，经SB0、SB1、S0形成寄生回路流入X000端子，使输入位X002错误地变为ON。各开关串联了二极管后，切断了寄生回路，避免了错误的产生。但使用该方法应考虑输入信号强弱。

◆ 企业名称：厦门泰尼电气有限公司

◆ 企业性质： 有限责任公司

◆ 主营业务：DCS,PLC

◆ 经营模式： 贸易

◆ 贸易地区： 全国

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◆ 邮政编码： 361026

SQUARE D FH FH26100AC 100 AMP 2 POLE 600 VAC CIRC

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OMEGA PX771A-100WCDI PX771A100WCDI TRANSMITTER

SKF SYR-2-3/4 SYR234 REPLACES 212E PILLOW BLOCK B

SKF 22318-CCKJ 22318CCKJ 22318-CCKJ-C3-W33 BEARIN

SQUARE D HU662RWK 60AMP 600VAC SAFETY SWITCH

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HIRSCHMANN RSB20-0800T1T1SAABHH RSB200800T1T1SAAB

EMECANIQUE XBT-H012010 XBTH012010 DISPLAY UNIT

PHOENIX CONTACT FL-SWITCH-LM-8TX 28-32-63-2 28326

SKF 22314-CC-C-3-W513 22314CCC3W513 BEARING

FPE NEF NEF431100 100 AMP 3 POLE 480 VAC CIRCUIT 

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1 PHOTON CONTROL 3 AXIS SLIDE ASSEMBLY & CUSTOM ATTACHM

1 LOT LIGHT CHIP XYGEPREC/LL/PWR WTH GENERIC COMPUTERS

CUTLER HAMMER DH361UDKW2-GP DH361UDKW2GP

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NOVOTECHNIK LWG-360 LWG360 LINEAR TRANSDUCER

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CUTLER-HAMMER D60LA3 RELAY CONTROL

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GE CR387CT98MCEGALTA NEMA SIZE 1 COMBO STARTER

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KEMKRAFT 965 DATA INTERFACE BOX

MOELLER NZMB2-M125 NZMB2M125 CIRCUIT BREAKER

ALLEN BRADLEY 849-ZOD321 849ZOD321 TIMING RELAY

ALLEN BRADLEY 512-AAH-3-4R-6P-24R 512AAH34R6P24R

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TURCK VBM160-PX17-0.3M-RSM126-CS10864 MULTI BOX

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CUTLER HAMMER HFD HFD3125BP10 125 AMP 3P 600 VAC 

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