X20AT4222+X20BM11+X20TB12
X20AT4222+X20BM11+X20TB12
：祖巧丽
：
:
PLC与电气回路的接口，是通过输入输出部分（I/O）完成的。I/O模块集成了PLC的I/O电路，其输入暂存器反映输入信号状态，输出点反映输出锁存器状态。输入模块将电信号变换成数字信号进入PLC系统，输出模块相反。I/O分为开关量输入（DI），开关量输出（DO），模拟量输入（AI），模拟量输出（AO）等模块。
常用的I/O分类如下：
开关量：按电压水平分，有220VAC、110VAC、24VDC，按隔离方式分，有继电器隔离和晶体管隔离。
模拟量：按信号类型分，有电流型（4-20mA,0-20mA）、电压型（0-10V,0-5V,-10-10V）等，按精度分，有12bit,14bit,16bit等。
除了上述通用IO外，还有特殊IO模块，如热电阻、热电偶、脉冲等模块。
按I/O点数确定模块规格及数量，I/O模块可多可少，但其zui大数受CPU所能管理的基本配置的能力，即受zui大的底板或机架槽数限制。
电源模块
PLC电源用于为PLC各模块的集成电路提供工作电源。同时，有的还为输入电路提供4V的工作电源。电源输入类型有：交流电源（220VAC或110VAC），直流电源（常用的为24VDC）。
底板或机架
大多数模块式PLC使用底板或机架，其作用是：电气上，实现各模块间的，使CPU能访问底板上的所有模块，机械上，实现各模块间的连接，使各模块构成一个整体。
PARKER 110/120V 10W 150 PSI SOLENOID VALVE COIL, 71315AKDKN00, NNB
NUMATICS 24VDC 4.0W 14.5-232 PSIG-AIR SOLENOID VALVE, I22BB500R061D61 *NEW*
SMC 145PSI, 24VDC, SOLENOID VALVE WITH PLUG VPN-8-FIG-D
MAXON 50PSIG, 120/60 SOLENOID/CLUTCH?, 280VA, SHUT-OFF VALVE 2-1/2" F5000CP 1
ASCO SOLENOID VALVE REBUILD KIT 264013 NIB
FESTO 232 PSI VALVE MANIFOLD SUB BASE VIGK-04-D-1
MAC 20-120PSI, 24VDC, 6.4W, PNEUMATIC SOLENOID VALVE 92B-BAB-000-DM-?DDAP-1DH
JAMESBURY QUADRA-POWR ACTUATOR W/ 316SS 6" VALVE 815L 11 3600TT
APOLLO 2" 1000PSI BALL VALVE 83R-208-01 NIB
HYDAC HIGH PRESSURE IRON BALL VALVE KHM-32SAE-1114 5000 PSI
HYTORK 680 ACTUATOR W/ 4" TRICENTRIC VALVE ACCUTRAK MONITOR, PLASTIC 103395
VICKERS DIRECT CHECK VALVE DGMDC-5Y-PK-30
JAMESBURY 125PSI ACTUATOR ST-1800 MOD. A W/ 10" 316SS VALVE 10-6150-71-3600?-TT1
SMC 3 PORT LOOK OUT VALVE NIB VHS50-F10
FOXBORO PRESSURE REGULATOR B0123HF NIB
NUMATICS 24VDC 4.0W 14.5-232 PSIG SOLENOID VALVE W/ BASE, I22BB615R061D61 *NEW*
PARKER PREP-AIR II PRECISION REGULATOR 035501030
SMC 01~0.83MPa, SOLENOID VALVE ARBF5050-00-B-2?-P
KITZ 88W CHECK VALVE FC 10K-50
JAMESBURY ACTUATOR ST-200 B ESPE POSITIONER W/ 3" VALVE 5150313600MT
KIP INC. 120V 10W SOLENOID VALVE 652015
MASONEILAN DRESSER 4" ACTUATOR VALVE 87-80386 103458
MANNING MAXWELL & MOORE 2" 26480LB CONSOLIDATED SAFETY VALVE 1557HD20
PARKER MANUAL SOLENOID VALVE 52981100
CRANE F1361FP ANSI/NSF61-8 3/8" NPT 600 WOG BRONZE BALL VALVE, NNB
VICKERS 1000PSI REDUCING VALVE XCT-08-1B-30
VELAN 12" 316SS 150 CWP KNIFE GATE VALVE L18-0320B-13BL -M
ECKSTROM 12" GATE VALVE 170126
CAPITAL CONTROLS ADVANCE GAS CHLORINATOR 200 SERIES
FISHER BAUMANN 1 INCH, 7-15PSI, 13Cv UNIVERSAL GLOBE VALVE 32.24577SVF / 3661
ASCO RED HAT SOLENOID VALVE 8320G172
DEZURIK 16" PRECISION CONTROL VALVE 9157090
JAMESBURY 316SS 275PSI 8" BALL VALVE 9150313600XTZ2
NUMATICS PNEUMATIC SOLENOID VALVE 031SA400E000061
PARKER 5000 PSI HYDRAULIC CHECK VALVE, CM2PP30
ASAHI 150 PSI 3" AV BALL VALVE, 80-3"
NUMATICS 026 AMPS PNEUMATIC SOLENOID VALVE 24 VDC 081SS400M
SMC 24VDC DIRECT OPERATED POPPET SOLENOID VALVE W/ (2) FITTINGS, VK332V
JAMESBURY QUADRA-POWR II ACTUATOR QP2C/ M W/ 2" VALVE R23C B02 CCJA
VICKERS HYDRAULIC VALVE DGMPC 3 ABK BAK 41
NUMATICS 150PSIG, 24VDC, 4.0W SOLENOID VALVE 134BB415MP00061 *NEW*
NUMATICS 120V 50-60HZ .37A 150PSI SOLENOID VALVE A23SS43AS000030 *NEW*
OTHER * HYCON HIGH PRESSURE BALL VALVE * KHM-40NPT-1114
NIBCO 10", 250 CWP BUTTERFLY VALVE LD 3110
PARKER HYDRAULIC PRESSURE CONTROL VALVE PRC3MM
NUMATICS 120V .30A 150 PSIG-AIR DOUBLE SOLENOID VALVE I34SS500K000030?, *NEW*
WATTS REGULATOR 1" BRASS SHUT OFF VALVE
LUBRIQUIP DIVIDER VALVE F89 MSP-5T
A-C VALVE 18" KNIFE GATE VALVE 76-6 18 5-91
PARKER D1VW20BNYCF 75 DC DIRECTIONAL CONTROL VALVE
NUMATIC SHUT OFF VALVE VK21-04N 9E8 NNB
PROMINENT 10-150PSI BACK PRESSURE VAVLE 7740967 103743
HD BAUMANN INC. CONTROL VALVE ACTUATOR 23-26-200 104553
SKINNER PARKER SOLENOID VALVE COIL V5-7724-F24 NIB
PARKER 110/120V .42-.50A 5000 PSI DIRECTIONAL CONTROL VALVE, D1VW20BVYCF 72
NORGREN FILTER REGULATOR B08-297A3MA, NNB 103034
MANESMANN REXROTH 24V 1.46A DIRECTIONAL CONTROL VALVE 4WE-10Q32/CG24N?9DK24L
