140DAI44000C Quantum

(1)從PLC主機至I/O站的信號大衰減值為35dB。因此，電纜敷設前應仔細規(guī)劃，畫出電纜敷設圖，盡量縮短電纜長度(長度每增加1km，信號衰減0.8dB);盡量少用分支器(每個分支器信號衰減14dB)和電纜接頭(每個電纜接頭信號衰減1dB)。

(2)通信電纜好采用單總線方式敷設，即由統(tǒng)一的通信干線通過分支器接I/O站，而不是呈星狀放射狀敷設。PLC主機左右兩邊的I/O站數(shù)及傳輸距離應盡可能一致，這樣能保證一個較好的網(wǎng)絡阻抗匹配。

(3)分支器應盡可能靠近I/O站，以減少干擾。

(4)通信電纜末端應接75Ω電阻的BNC電纜終端器，與各I/O柜相連接，將電纜由I/O柜拆下時，帶75Ω電阻的終端頭應連在電纜網(wǎng)絡的一頭，以保持良好的匹配。

(5)通信電纜與高壓電纜間距至少應保證40cm/kV;與高壓電纜交叉時，垂直交叉。

(6)通信電纜應避免與交流電源線平行敷設，以減少交流電源對通信的干擾。同理，通信電纜應盡量避開大電機、電焊機、大電感器等設備。

(7)通信電纜敷設要避開高溫及易受化學腐蝕的地區(qū)。

(8)電纜敷設時要按0.05%/℃留有余地，以滿足熱脹冷縮的要求。

(9)所有電纜接頭，分支器等均應連接緊密，用螺釘緊固。

(10)剝削電纜外皮時，切忌損壞屏蔽層，切斷金屬鉑與絕緣體時，要用剝線鉗，切忌刻傷損壞中心導線。

140DAI44000C 

Vacuum Chamber Pump VAT UHV Perkin Elmer Load-Lock

Kurt Lesker 3" Magnetron Sputtering Gun Source UHV

FSI Phoenix Cassette Holder for Upper Spinner Unit SRD

PentaMetric Battery Monitor Input & Computer Interface

Verteq SRD A182-50MEB 100mm Wafer Spin Carrier Rotor

STI SemiTool SRD Wafer Rotor A194.50MB for Wash System

Granville Phillips 303 Vacuum Process Controller 303007

STI Semitool Wafer Spin 11" SRD Wafer Rotor 2800 RPM

Applied Materials Capacitance Pirani Gauge CDG / Pi

Sony PVM-8041Q 8" Hi Resolution Video Monitor

Bogart TriMetric 2025 Solar Battery Meter & Shunt

NEW Trimetric 2020 Solar Battery Meter w/ Mount & Shunt

Fischer Mess-Und Regeltechnik Valve Assembly System

Kniel CP24.5 Primary Switched DC Power Supply VME

New Topward TPS-2000 DC Power Supply 0-60VDC 0-1A

Agilent HP J2177A Pair Scanner - Handheld TDR

Mattson Steag AST VME DAQ Interlock Modules w/ Keys

Kniel CP24.6 Primary Switched DC Power Supply VME 144W

Kniel CP24.0,6 Linearly Regulated DC Power Supply VME

Kniel CP15.6 DC Power Supply VME Primary Switched

Locus Kaman RF109-60-60 GaAs FET Amplifier 3.7-4.2 GHz

Pneumatic Valve Assembly Manufactured by Zamrot Ashalim

Bogart TriMetric 2025-A Solar Battery Meter w/Reminders

Vicor VI-TRY6-CCX 3-Ph Front End 5000W Power Supply

Aeroquip Barco Division Portable Master Meter 50" Water

KinTek Stopped-Flow Controller

Synchronous SNMP Proxy Agent Motorola

Five (5) Siemens Tristar Carbon Headsets Part # 67100

Inficon Leybold-Heraeus IMC-2 Memory / Printer

Leybold Inficon 908-141-G1 Power Module

Scientech Power Energy Meter 362 Model 36-2002

Mitsubishi PC4700L High Performance Emulation Bench

PADS Development Labs Voltage Regulator Power Source

Tylan General Capacitance Manometer Controller 80-6B

TTC/ACTERNA Fireberd MC2000 Data Error Analyzer

Nikon Rotation Swiveling Table 8" x 7"

Stratagene PosiBlot Pressure Control Station 400343

Renata AG Multicheck 500 System with Accessories

Electrohome Data Video Switcher Modules & Cables

Four (4) Siemens Encore Mono Monaural Carbon Headsets

Tektronix 015-0149-00 75 Ohm Return Loss Bridge

AP Circuit AP-4392 8 Channel Multi-Filter System

Airtron BUORD Waveguide 332746 187658 20 7/8" Long

Harris Farinon Ferrites 031 336666 Opt 001 Waveguide

7 Waveguides & Microwave Parts HP MDL Sage Airtron MORE

B&L Optical Density / Percent Transmittance Meter

Lot of 3 Statham Instruments Linear Accelerometers

Allen Bradley 700-PK200A1 & 700-P400A1 Relays

Hv Hf Antenna Base with Cables As Is

Astro Tool Insertion 1704B & Removal 1901B Tool Set

Three (3) Siemens Headset Amplifiers Part # 67115

Merrimac R-30 Coax Direct Reading Phase Shifter 0-360°

ATV FK 105-10 Milling Head Control Unit

HP Agilent Pod 5 Data Logic Analyzer Probe Cables

Cyclades PR-3000 T1 Router PR3000 Internet Connectivity

SONY PCS-U3010 PTH Pan Tilt Interface with Cables

WWII Vintage Lavoie Microwave Frequency Meter 105SM

Warm Gray Siemens Optiset E Advance Plus Phone White

Gatefield AsicMaker Device Programmer

MKS Baratron Pressure Meter Head Type 310CHS-1

Polytechnic Research Airforce Frequency Meter 579B

Ampex DT1392862 NTSC Color Field Identifier

Silicon Gear Mercury Jr LVD Array JBOD Solution M4LVD

Two Allen Bradley Transformers 1497-B-ABDX-3-F A

Ion Analyzer Beckman SelectIon 2000 Potentiometer

Prepared Meter to Shunt 50' Cable 4 Wire

Airtron Waveguide Freq 12.7-13.2 GC/S 336878 Magnet

Two Allen Bradley Relays 700-P800A1 & 700-P400A1

New Fusetron FRS-R 200 Amp Dual Element Time Delay Fuse

HP Agilent E1721A Non-Contact Push Pin Sensor Laser vxi

Tamar Electronics Adapter Coax to Waveguide 301045

Western Electro-Mechanical Vintage Kilo-Volt Tester

Hughes Microwave Components Circulator 1168 Waveguide

HP Modified As Is Detector Mount 5" Long X485B

Microwave Associates MA 836C Waveguide WR137 ?

Uniweld Brass Gas Pressure Gauge Assemblies

Mercoid Control DA-31-153 Bourdon Tube Pressure Switch

Sperry Microline 339 Coupler for Radar RF Microwave

Kearfott General Precision Model C993 100 911 Coupler ?

Weinschel Engineering 502-3 2.8db @1KMC - 3.1db @10KMC

Weinschel Engineering 502-10 9.4db @1KMC - 10.4db@10KMC

Melabs Circulator 4" x 4"As Pictured

Weinschel Engineering 50-20 19.93 db DC Attenuator

Lucent 1151A1 Power Unit 48 Volt DC 0.4 Amp

Device Programmer Module WSI MagicPro III

Device Programmer Module WSI MagicPro II

MKS Tenta cPCI PWRS-0720 Power Supply Compact PCI Card