根据PLC的安装方式，系统分为集中式、远程I／O式和多台PLC联网的分布式。集中式不需要设置驱动远程I／O硬件，系统反应快、成本低。大型系统经常采用远程I／O式，因为它们的装置分布范围很广，远程I／O可以分散安装在I／O装置附近，I／O连线比集中式的短，但需要增设驱动器和远程I／O电源。多台联网的分布式适用于多台设备分别独立控制，又要相互联系的场合，可以选用小型PLC，但必须要附加通信模块。
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Schneider Electric LXM05AD14N4 Servo Motor Drive With BSH0703M31A1A Servo Motor
Schneider Electric XS1N08PA349L1 Inductive Proximity Sensor, Range: 25mm
Schneider Electric Zelio SR2A101BD Smart Relay, 24VDC DC, Programmable, 2.7 Watt
Schneider NSC60E Circuit Breaker With Rotary Handle, 3-Pole, Rating: 60 Amp
Schneider SyMAX ADP100 Power supply Mount Slot
Schneider ZB4-BG6 Selector Switch 2 Pos.
Schneider-Kreuznach XENOPLAN 1.9/25 C-Mount Lens
Scholly Fiberoptik 150H Universal Fiber Optic Light Source *Broken Brightness*
Schrader Bellows FLC112121 Hydraulic Cylinder, 2.5" Bore, 6" Stroke, 500psi Max
Schroeder LF12K3HPXG874 Bypass Valve
Schroff 60118-340 Keyboard PS/2 w/ Trackpad Rack Mount Tray 19" 482mm Width Gray
Schunk 302317 Quick Change Tool Adapter *No Support Pins Included*
Schunk 302317 Quick Change Tool Adapter w/ 5/32" Elbow Quick Connect
Schunk 356855 Rev. CA Connector Cable 30VDC 6 Pin
Schunk KGG 80 Parallel Gripper, Stroke: 15mm Per Finger, Closing Force: 88N
Schunk MRU 10.2-E-2 Rotary Actuator, Rotating Angle: 180°, 4.5-8 Bar
Schunk OSE-B 45 Hydraulically Damped Rotary Actuator
Schunk OSE-B57/1 Pneumatic Rotary Actuator, 0-90degrees
Schunk PGH30 Parallel Pneumatic Air Gripper 60mm Stroke
Schunk PGN+64/1AS Pneumatic Parallel Gripper, 6mm Stroke Per Finger, 340N Force
Schunk PHE80-80 Pneumatic Air Linear Slide Compact Cylinder 80mm Stroke
Schunk SKE22 Pneumatic 90 Degree Rotary Unit
Schurter CDA4.4199.151 Power Entry Module 250V 50/60Hz W/Press Switch
Schurter CG 10.6101.151 Power Entry Module With Line Filter, Voltage: 250VAC
Sciemetric 1103 Intelligent Signature Analysis Meter 120VAC 30W w/Encoder Input
Sciemetric sigPOD 1804 Process Monitor, 8 Digital I/O, 4 Analog In, 4 Encoder In
Scienscope Digital Microscope w/STC HD-133DV Camera, Ring Light, Lens Coupler
Scienscope SSZ Series Stereo Zoom Microscope, No Eyepieces, No Stand
Scientech 380401 Laser Calorimeter, Absorber Type: Volume, Aperture Dia: 100mm
SciMatCo SC5000 Polypropylene Acid Lab Bench Storage Safety Cabinet 2.5 Liter
Scinics Multistirrer MC-303 Lab Stirrer, Voltage: 120 VAC, Agitator
Scitec Instruments Model 420 Dual Phase Analogue Lock-In Amplifier 115/230VAC
Scott Instruments 4600MB Universal Gas Transmitter w/ 0-1PPM Diborane Sensor
Scott Instruments 4600MB Universal Gas Transmitter w/ Power Supply & Sensor
Scully Plug & Cable Assembly With Sculcon Junction Box and Deadman Switch
Sea Level 7804 Interface Card
SeaMetrics Analog Sensor Transmitter 4 to 20 mA AO55
Seco D29206 Electronics Card Cage Control Module, Voltage: 460VAC
Seco Electronics 8500 SCR DC Motor Speed Control 120VAC to 100VDC *For Parts*
Seeka F1RM-PN Fiber Optic Amplifier With FRSV83BC Fiber Optics, 12-24VDC
Seeka F1RM-PN Fiber Optic Sensor 12-24VDC
Seepex Inline Gear Reducer 32.5:1 Ratio, 14mm I.D. Input, 20mm Output Shaft
Selcom 808246 SLS-PU Power Supply for SLS 7000 Laser Systems w/Cables & Key
Selcom LMI SLS7000 SLS7000-1/15-IS SLS-PU Laser Sensor System
Sellstrom Wall Mounted Spill Control Station 15" x 30.375" x 9.5" w/Contents
SEM 30M4-59 DC Servo Motor, Max Speed: 2400RPM, Voltage: 142V, Stall Torque: 3NM
SEM BMF115J6-60T Brushless DC Servo Motor 180V 24A 3000RPM 3/8" Shaft
SEM MT-30R4-37 Permanent Magnet DC Servomotor 3750 RPM *For Parts Only*
Senix Ultrasensor Ultra-S Ultrasonic Non-Contact Distance Level Sensor *Damaged*
Sensiflo Model P1 Single Stage Pressure Reducing Regulator,1/4 NPT Ports,3600PSI
Sensotec DM Demodulator for AC Transducer With PLVK AC-AC Transducer
Sensotec FPG/C748-01 Pressure Transducer, Supply: 9-28VDC, Output: 4-20mA
Sensotec SC2000 Transducer and Signal Conditioning Unit 100-230V w/ Load Cell
Sensus 122-12 Gas Regulator 1-2PSI Spring Range 1 1/2" NPT 02-12 12" Diaphragm
Sentech STC-400 CCD Camera with Control Unit & Cables 120VAC
Sentech STC-400 Monohcorme Hi-Resolution CCD Camera, B/W 768x494, No PWR Supply
Sentech STC-400HOL CCD Camera 12VDC 12Pin Monochrome
Sentech STC-400L Monochrome Hi-Resolution CCD Camera 1/2" Sensor w/Power Supply
Sentrex CLC-0750-AAA Line Conditioner, Input: 120V 5.52A, Output: 120V 6.25A
Sentrol 301-BLT-06J GuardSwitch w/Sensor Actuator
Sentrol 301-BLT-06J GuardSwitch, 48VAC/DC Maximum
Sentrol Industrial 301-BLT-06J Guardswitch, 48VAC/DC Max, 40VA/W Max
Sentrol Industrial 301-CT-06K Safety Interlock Switch, 2.5VA, 30V (83mA)
Sentrol Industrial INT-03 Safety Relay 120/230VAC, 24VDC 5VA *Case Damage*
Sentry 250 Current Switch 250Amp
Serfilco APS3000A JB1S071N 44-0715D Pump 2500RPM, 1/15HP, 1.04A
Servo Dynamics SD.51-36 7300-8066 Servo Controller
Servo Dynamics SD4-1015-101-3 4 Axis Drive Controller
Servo Dynamics SD4-1015-101-4 4 Axis Chassis w/4 Mods and 1 Sectional Shunt
Set of 10 Alcoswitch 3-Way Selector Switch 164P
Set of 12 Green Alcoswitch Toggle Pushbuttons 164EL5
Set of 14 Alcoswitch Green Led Indicators 164EZ
Set of 20 Alcoswitch Green Led Indicators 164EZ
Set of 6 Alcoswitch 3-Way Selector Switch 164P
Set of 7 Alcoswitch Green Toggle Pushbuttons 164EL5
Set of Vintage McGrath St. Paul Calipers 600mm & 900mm
Sethco 574P00K36331D4C Motor 190/360VAC 50Hz 230/460VAC 60Hz 1/4HP 3PH
Setra 280E Pressure Transducer 0 to 500 PSIG, 24VDC, 0 to 5V
Setra C207 Pressure Transmitter 0-100 PSIG 24VDC