PLC分配输入/输出点 

　　一般输入点和输入信号、输出点和输出控制是一一对应的。分配好后，按系统配置的通道与接点号，分配给每一个输入信号和输出信号，即进行编号。在个别情况下，也有两个信号用一个输入点的，那样就应在接入输入点前，按逻辑关系接好线（如两个触点先串联或并联），然后再接到输入点。 

　　（1）确定I/O通道范围 

　　不同型号的PLC，其输入/输出通道的范围是不一样的，应根据所选PLC型号，查阅相应的编程手册，决不可“张冠李戴”。必须参阅有关操作手册。 

　　（2）内部辅助继电器 

　　内部辅助继电器不对外输出，不能直接连接外部器件，而是在控制其他继电器、定时器/计数器时作数据存储或数据处理用。 

　　从功能上讲，内部辅助继电器相当于传统电控柜中的中间继电器。未分配模块的输入/输出继电器区以及未使用1：1链接时的链接继电器区等均可作为内部辅助继电器使用。根据程序设计的需要，应合理安排PLC的内部辅助继电器。

KROHNE ALTOMETER MODEL# GS7 F2

10 METRIC EMB CARBON STEEL FITTING EQUAL ELBOW ME42L

EAGLE TIMER CG310A6

SIEMENS MOTOR PROTECTOR 3VE3000-2LA00

SIEMENS MOTOR PROTECTOR 3VE3000-2MA00

VWR 87001-694 20ul BARRIER PIPETTE TIPS LOW BINDING, ST

PERKIN ELMER 1295-4010 PRECISE TIP 550ul TWENTY RACKS

VWR 87001-698 200ul BARRIER PIPET TIPS. STERILE. 10 RAC

NUMATICS SH SERIES LINEAR SLIDE SH15006LB36DS4

NUMATICS LINEAR SLIDE MODEL# XX03I0017

VALVE MANIFOLD WITH 3 SOLENOID VALVE 110VAC 50/60HZ 0.1

GE REAL PARTS FOR UNIGLOW UNIMOUNT 35-969920-60 NIB

EPPENDORF REPEATING PIPETTE DISPENSING TOOL

4 STAINLESS STEEL SANITARY 2 TUBE CAPS 1" 9-3/4" ANGLED

KOLD DRAFT FTR-01500 ICE MAKER EVAPORATOR ASSEMBLY

APPLIED MOTION PRODUCTS 3540M STEP MOTOR DRIVER

ABB B7-40-00 CONTACTOR SEE PICS FOR SPECS

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REXROTH BOSCH 082007228 5/3 WAY SOLENOID SPOOL VALVE

PACIFIC SCIENTIFIC MOTOR E31NRFT-LNF-NS-00

SUPELCO 52794-U HybridSPE Phospholipid Small Volume 15

4 SORVAL 00894 5 TUBE SWINGING CENTRIFUGE BUCKETS 28 MM

2 SORVAL 00833 20 TUBE SWINGING CENTRIFUGE BUCKETS 16 M

Animatics Power Supply - 24 Volt 8 Amp #PS24V8A-110

SYMBOL PDT8148 POCKET PC SCANNER AND CRADLE

FULTON B125-150-2003-S 1-1/4" BALLSIGHT FLOW INDICATOR

FIRESTONE INDUSTRIAL 12" 28-312 2 PLY AIRMOUNT

CAMFIL FARR, 30/30 PLEATED PANEL AIR FILTER P/N 049880-

ALLEN BRADLEY 100-A09ND3 CONTACTOR W/RELAY 193-BSB22

MAC-MOD PRE-COLUMN FILTERS MMCS-210 COLUMN SAVER 10PK

MATHESON 55A MANUAL PACKED STEM VALVE 1/4" OD COMPRESSI

WATERS 186001124DV Deactivated Clear Glass 12 x 32mm Sn

LOT OF 7 BRASS SPRACO LECHLER 7204XX0242 AIR ATOMIZER B

BROADLEY-JAMES CORP 330-61-H070 MDL 330 HOUSING FOR PRO

PHENOMENEX SECURITYGUARD AJ0-9000 ULTRA HOLDER FOR UHPL

FISHERBRAND 02-707-182 1-200ul GEL LOADING PIPET TIPS 1

PART CASE OF 32 CORNING 3610 ASSAY PLATES. 96 WELL, FLA

RAININ CR-7 Carousel Stand

ANALYTICAL SALES & PRODUCTS 62510 10cm DOUBLE UHPLC ASS

WILKERSON F16-03-G00 FILTER W/ WDV3-G12BL ELECT DRAIN

ECA PROXIMITY CONTROL SWITCH MODEL# 42SRP-6006 

POTTER WATER FEEDER AND WATTS REGULATOR

VICKERS DOUBLE-A QF-5-0-10A3 DUAL SOLENOID VALVE

LOKRING MAS-3000-EL90-P32-LR 2" CARBON STEEL 90° ELBOW

LAB CONNECTIONS TC-TRANSFORMER LC3002 LCT CONTROLLER

NUPRO 1/8" TUBE 316 SS METERING VALVE

AMICON CENTRICON PLUS-80 UFC5LGC08 CENTRIFUGAL FILTER D

BECTON DICKINSON FALCON 353113 TISSUE CULTURE FLASKS 19

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COSTAR MICROCENTRIFUGE TUBE .65ml CAT#3206 SEE PICS FOR