DPW02, 电源24VDC,5A 

DPW02, 电源24VDC,5A 

DCS是由模拟仪表控制系统发展而来，初期的功能以回路调节为主，之后又加入了顺序控制的功能。DCS的设计思想是操作管理集中，控制分散以提高整个系统的可靠性及管理能力。DCS的上述优势使它在控制系统的高端市场仍占主流。但DCS比PLC价位高，对一些资金有限的中小型企业有时难以承受。

    本文探讨的这种混合式控制系统整合了PLC与DCS的优势，对需要实现低成本自动化（LCA）的场合尤为适用。

    二、混合式控制系统结构

    该系统主要以DCS的设计思想为基础，综合PLC与DCS的各自优势。它主要由系统网络、操作员工作站、中央服务器、控制器及输入/输出（I/O）模块等部分组成。

    1、系统网络

    对DCS而言，系统网络是整个系统的基础和核心，对整个系统的实时性、可靠性和可扩充性起着决定性的作用。对混合式控制系统也是如此。

    如图1所示，HCS是分级控制系统，共分两级：操作管理级及过程控制级。操作管理级的各项设备——操作员工作站及中央服务器由N1网连接。N1网是一局域网（LAN），对它的要求是能以较高的速率传输大量数据，可选用Ethernet（以太网）或ARCNET。Ethernet采用载波侦听/多路访问协议，具有10Mbps及100Mbps的通讯速度，但它不具备实时性；ARCNET采用令牌传输协议，具有2.5Mbps的通讯速度，具有好的实时性。N1网的网络拓朴结构可采用星形、总线形、混合形等。总线结构的网络技术比较成熟，施工相对简单，节点的加入或退出也无需中止网络运行，是工业控制网常用的网络结构。N1网的传输介质可使用双绞线、同轴电缆或光纤。

MICROSCOPE TURRET OBJECTIVE HOLDER (5 POSITIONS) CODE: OT-101
 
MICROSCOPE TURRET OBJECTIVE HOLDER (5 POSITIONS) CODE: 0T-100

ZEISS MICROSCOPE OBJECTIVE A-PLAN 10/0.25 160/-
 
REICHERT-JUNG ULTRATRIM ULTRA MICROTOME MICROSCOPE MIC-127
 
TRW HIGH SPEED DC MOTOR 405A223 12VDC 7000RPM (2ea.)
 
LEESON 7.5 HP AC MOTOR #140593.00 575VAC 60HZ. 2780RPM
 
TOSHIBA 3HP AC MOTOR # B0032FLF2AK 230/460VAC 60HZ 3490 RPM TEFC
 
BALDOR 3/4HP AC MOTOR & BRAKE #VBL3507 115-208/230VAC 60HZ 1725 RPM
 
LINCOLN ELECTRIC 1.5HP AC MOTOR #KM40 230/460VAC 60HZ 3420 RPM
 
LINCOLN ELECTRIC 1HP AC MOTOR #KM428CN 208-230/460VAC 60HZ 1740 RPM
 
LINCOLN ELECTRIC 3/4HP AC MOTOR #KM422C 208-230/460VAC 60HZ 1740 RPM
 
LINCOLN ELECTRIC 1/2HP AC MOTOR #KM416 208-230/460VAC 60HZ 1745 RPM
 
LEESON 3/4HP AC MOTOR #110354.00 575VAC 60/50HZ. 3450 RPM
 
LINCOLN ELECTRIC 3/4HP AC MOTOR #KM422G 208-230/460VAC 60HZ 1740 RPM
 
LEESON 10 HP IEC METRIC AC MOTOR #193120.60 230/460VAC 60/50HZ. 3520RPM
 
TATUNG ELECTRIC 2HP AC MOTOR # TB0022FFA 208-230/460VAC 60HZ. 3420 RPM
 
TATUNG ELECTRIC 1-1/2HP AC MOTOR # TB1Y52FFA 208-230/460VAC 60HZ. 3420 RPM
 
TATUNG ELECTRIC 1HP AC MOTOR # T0014DFA 208-230/460VAC 60HZ. 1720 RPM
 
LEESON 5HP AC PUMP MOTOR # 131580.00 208-230/460VAC 60HZ. 3500RPM
 
LEESON 10HP STAINLESS STEEL AC MOTOR # G140699.00 208-230/460VAC 60HZ. 3510RPM
 
LEESON 2HP IEC METRIC AC MOTOR # 192143.00 575VAC 60/50HZ. 1700RPM
 
LEESON 2HP AC MOTOR # 111611.00 575VAC 60HZ. 3450RPM
 
AJAX 1/3 HP AC MOTOR # N0-NAT-13 208-230/460VAC 60HZ. 1725RPM
 
LEESON 1/3 HP AC MOTOR # 092038.00 208-230/460VAC 60/50HZ. 1725RPM
 
CGI INC. PRECISION PLANETARY GEAR HEAD frame SIZE: NEMA 56 RATIO: 28:1
 
LEESON 1/2 HP AC MOTOR # 110176.00 575VAC 60/50HZ. 1725RPM
 
LEESON 1/3 HP AC MOTOR # 110711.00 575VAC 60/50HZ. 1725RPM
 
LEESON 1/4HP AC MOTOR # 110030.00 208-230/460VAC 50/60HZ. 1725RPM
 
DAYTON 3/4HP AC MOTOR # 3N496 208-230/460VAC 60HZ. 1140RPM NIB
 
AIR PRODUCTS GAS REGULATOR # E11-K-N515D DUAL GAUGE 0-200PSI 0-4000PSI
 
WAVE BIOTECH WAVE BIOREACTOR P/N base 2E (PARTS)
 
SEW EURODRIVE AC GEAR MOTOR # RF17 DR63S4 240/415VAC 60HZ. 121RPM
 
RELIANCE ELECTRIC 2HP AC MOTOR # P14G7510R-AB 230/460VAC 60HZ. 1725RPM
 
RELIANCE ELECTRIC 2HP AC MOTOR # P14G7510M-FB 230/460VAC 60HZ. 1725RPM
 
LEESON 3HP AC MOTOR # 110222.00 230VAC 60HZ. 15AMPS 3450RPM frame H56
 
LINCOLN 25HP AC MOTOR # LM31681AA 230/460VAC 60HZ. 1774 RPM 284T frame
 
AO SMITH 1HP AC MOTOR & START CAPACITOR 115/208-230VAC 60HZ. 1725RPM 56C
 
RELIANCE ELECTRIC DUTY MASTER 3/4HP AC MOTOR & GEAR REDUCER 460VAC 117RPM
 
Intermec Sabre 1552 Wireless Barcode Scanner 9745 base Station & software
 
HYTROL SPEED REDUCER MODEL# 4A RATIO: 10:1 OUTPUT SHAFT: 1.0" X 1.875"
 
NSK LINEAR GUIDE BEARING BLOCK # LAH20HL WEIGHT: 1.5LBS
 
NSK LINEAR GUIDE BEARING BLOCK # LAH25GL-90 WEIGHT: 2LBS
 
IKO LINEAR WAY BEARING BLOCK # LWHD35C1BT1PS2 WEIGHT: 3.5LBS NIB
 
RELIANCE ELECTRIC DC MOTOR DRIVE 3/4HP INPUT:115VAC OUTPUT: 90VDC 7.

RELIANCE DODGE GEAR SPEED REDUCER 56 MOUNT RATIO 15:1 #Q175B015M056L 524 IN-LBS
 
GE GENERAL ELECTRIC 2HP AC MOTOR DRIVE ConTROLLER AF-300ES 380/460VAC 50/60HZ.
 
GE GENERAL ELECTRIC 1HP AC MOTOR DRIVE ConTROLLER AF-300ES 380/460VAC 50/60HZ.
 
DODGE GEAR SPEED REDUCER 56 MOUNT RATIO 10:1 #Q175B010M056K1 524 IN-LBS
 
DODGE GEAR SPEED REDUCER 56 MOUNT RATIO 20:1 #15A20R56 TORQUE: 407 IN-LBS
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