西門子S7-1500 PLC通信模塊6GK7542-6UX00-0XE0
西門子S7-1500 PLC通信模塊6GK7542-6UX00-0XE0
西門子S7-1500 PLC通信模塊6GK7542-6UX00-0XE0
交換是按照通信兩端傳輸信息的需要，用人工或設(shè)備自動完成的方法，把要傳輸?shù)男畔⑺偷椒弦蟮南鄳?yīng)路由上的技術(shù)的統(tǒng)稱。交換機根據(jù)工作位置的不同，可以分為廣域網(wǎng)交換機和局域網(wǎng)交換機。廣域的交換機就是一種在通信系統(tǒng)中完成信息交換功能的設(shè)備，它應(yīng)用在數(shù)據(jù)鏈路層。交換機有多個端口，每個端口都具有橋接功能，可以連接一個局域網(wǎng)或一臺高性能服務(wù)器或工作站。實際上，交換機有時被稱為多端口網(wǎng)橋。
網(wǎng)絡(luò)交換機，是一個擴大網(wǎng)絡(luò)的器材，能為子網(wǎng)絡(luò)中提供更多的連接端口，以便連接更多的計算機。隨著通信業(yè)的發(fā)展以及國民經(jīng)濟信息化的推進，網(wǎng)絡(luò)交換機市場呈穩(wěn)步上升態(tài)勢。它具有性價比高、高度靈活、相對簡單和易于實現(xiàn)等特點。以太網(wǎng)技術(shù)已成為當今最重要的一種局域網(wǎng)組網(wǎng)技術(shù)，網(wǎng)絡(luò)交換機也就成為了最普及的交換機。
Switch是交換機的英文名稱，這個產(chǎn)品是由原集線器的升級換代而來，在外觀上看和集線器沒有很大區(qū)別。由于通信兩端需要傳輸信息，而通過設(shè)備或者人工來把要傳輸?shù)男畔⑺偷椒弦髽藴实膶?yīng)的路由器上的方式，這個技術(shù)就是交換機技術(shù)。從廣義上來分析，在通信系統(tǒng)里對于信息交換功能實現(xiàn)的設(shè)備，就是交換機。
Hanna Instruments HI7639829/10 pH/EC/DO/Temp/Turb probe for HI9829
Hanna Instruments HI769828/100 Spare Temp. probe for HI9828 w/100m Cbl
Hanna Instruments HI769828/60 Spare DO/EC/C probe for HI9828 w/60m
Hanna Instruments HI769828/70 Spare DO/EC/C probe for HI9828 w/70m
Hanna Instruments HI769828/80 Spare DO/EC/C probe for HI9828 w/80m
Hanna Instruments HI769828/90 Spare DO/EC/C probe for HI9828 w/90m
Hanna Instruments HI8001-0400U Fertigation controller, Panel, 32, 115V
Hanna Instruments HI9828/4-01 Multiparameter Water meter w/4m Probe
HANSA MOTOREN FCM 225M-47HE MOTOR
Hanse Environmental TC-1
HANSEN GEAR REDUCER 83B 11-1, SHELF WORN RATED 125 HP AT 1750 RPM
HANSEN GEAR REDUCER RNE 34 - 31-1 SURPLUS
Hansen RDE43 275.49
HANSEN REFRIGERATION OIL CHILLER
HANSEN TRANSMISSIONS INTERNATIONAL TYPE NE21-AN-20 40 HP RPM 933 / 46.7 (GEARBOX
Hardinge 3 Jaw Chuck 2535H _ Thru-Hole 2-1/4"
HARDLY PHABRIX SxD DUAL LINK W/ ORIGINAL PACKAGING
Hardy HI 1756-2WS Series B Dual Weigh Scale Mod - with 30 Warrantee
Hardy HI 1756-2WS Series B Dual Weigh Scale Mod - EXLNT with 30 Warrantee
HARDY INSTRUMENTS HI 4050-PM-AC-EIP-N2-N3 WAVERSAVER C2
Hardy Instruments HI-1756-2WS Weigh Scale Module 1756-2WS WOW
HARDY INSTRUMENTS HI2160RC-RM-A1-E1 USPP HI2160RCRMA1E1
Hardy Instruments Load Cells Weight Controller 8489
HARFELY P90.1/PEFT Junior CONTROL UNIT / BURST-TESTER
HARFELY PHV 25.1 U-NETWORK 1,2/50us; 10/700us
HARLAND SIMON H4893P4075 INTELLA 310
Harland SIRIUS Patton Labeler Labelling Label Feed System Machine Serial # 7682
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Harmer & Simmons SM1800 Rectifier SM1800-50-33-DB
HARMON ELECTRONICS PMD-1 PHASE MOTION DETECTOR
HARMONIC DRIVE 472446-1 NSFP 4724461
HARMONIC DRIVE 472448-1 NSFP 4724481
HARMONIC DRIVE 479543-1 NSFP 4795431
Harmonic Drive and Electric Motor - Intromitter Drive A
HARMONIC DRIVE HTL8000-1L-AS-DC USPP HTL80001LASDC
Harmonic Drive HW9280634 Speed Reducer 32-120-347272-4 FRS-32-120-2-GR-SP
Harmonic Drive Systems AC Servo Motor MAC16-1B-CT1E
Harold Beck & Sons 14-108 LINEAR VALVE ACTUATOR 1800LBS THRUST
Harold Beck & Sons Actuator Model #11-305-046899-01-01
Harold Beck & Sons Group 11 Rotary Damper Drives and Actuators 11-155 045081-01-
HAROWE ENCODER 11BRCX-300-J10B
HAROWE SYSTEMS 11BRCX-300-G10/5 FNFP 11BRCX300G105
HARRINGTON HOISTS AH5000-P NSFP AH5000P
HARRIS 10307-1610-01 SPLITTER ASSEMBLY RF CONNECTOR BOARD NSN 5895-01-464-4365
HARRIS CORPORATION 101-115540-001 USPP 101115540001
HARRIS CORPORATION 12045-4001-102 NSFP 120454001102
HARRIS CORPORATION 193-115038-013 USPP 193115038013
HARRIS CORPORATION 193-115039-013 USPP 193115039013
Harris Dielectric RF System ATSC Digital TV Mask Filter Chan 9 20 KW-can retune
Harris Flexstar exciter
Harris Graphics STA7780 Electronics Board (Brand , never )
Harris RF-1310 AM/FM/SSB/ISB/CW Exciter
Hart 375 field communication unit
HART FIELDBUS 375 FIELD COMMUNICATOR WITH CASE, MANUAL, LEADS
Hart Scientific 7012
Hart Scientific 9107 Dry Well Calibrator Transcat 24344T with 1 Insert
HARTFORD 411BLFNBRMFBJ63 USPP 411BLFNBRMFBJ63
HARTFORD 411BLFNCOEMBJ6C NSFP 411BLFNCOEMBJ6C
Hartford Steam Boiler/LD-180P/LD180P/999-0267/9990267 OFFERS ACCEPTED
HARTMAN FIELD OVERVOLTAGE RELAY A-927AA NSN: 5945-00-719-4092 COIL 28V
HARTMAN RELAY BHR-125TH 5945-00-172-4002 123SCAV5242-1 250 AMPERES
HA-SH152CK Mitsubishi 3.5KW Servo Motor HASH152CK HA-SH152
HA-SH352CK Mitsubishi 3.5KW Servo Motor HASH352CK HA-SH352
HA-SH353 Mitsubishi 3.5KW Servo Motor HASH353
Hastings 6714 Ground / Jumper Assembly Tester w/ 6799 Hot Stick Tester Kit
HAUSER / 940-20001 COMPAX 0200-E
HAUSER HBV HBV 5000 SE0 SEO ( HBV5000 SE0 )
Hauser Parker COMPAX-M MOTION&CONTROL
Hauser Parker HLE 100 Linear Actuator Drive w/ Servo
Hauser Parker HLE 100 Linear Drive w/Servo 62" Travel w/Emerson DXM-455C & Neuga
Have the est N8972-60101 input module. Calibrated.
HAYSSEN 1078-7A-0002 I/O PC BOARD PART NO 1078 7A 0002
HAYSSEN 1078-7F-0054
HAYWARD DA10600FTP3 NSFP DA10600FTP3
HAYWARD EVT30KC2E24A NSFP EVT30KC2E24A
Hazardous Location Switch Gear. Stainless steel flameproof three phase plug EXD
HBC RADIOMATIC INC FSE-735 USPP FSE735
HBS DC Power Supply L25060X, Variable Powerstart Transformer,Semiconductor,lab
HCC HOFFMAN ENGINEERING PHOTOMETER TSP-904/LT S/N 384
HCN50924 SQUARE D PANELBOARD INTERIOR I-LINE 400A MLO 400A 600V 3P CIRCUIT (d)
HC-SFS152 Mitsubishi Servo Motor 200V 1500W 1.5KW 7.16Nm
HC-SFS202 Mitsubishi Servo Motor 200V 2000W 2.0KW 9.55Nm
HC-SFS502 Mitsubishi Servo Motor 200V 5000W 5.0KW 23.9Nm
HC-SFS702 Mitsubishi Servo Motor 200V 7000W 7.0KW 33.4Nm
HC-UFS502B MITSUBISHI SERVO MOTORS REMANUFACTURED
HD VideoScope with 5.8mm Semi-Rigid Probe a�“ Extech HDV610
HD VideoScope with 5.8mm Semi-Rigid Probe a�“ Extech HDV620
HD-1033/UA Integral Stirling Cryogenic Cyrocooler Thermal Camera Infrared FLIR
HD-3WXL CONTINUOUS DUTY HARD DRIVE DEGAUSSER- MACHINE WITH CASE
HD-3WXL CONTINUOUS DUTY HARD DRIVE DEGAUSSER- MACHINE WITH ONE
HD-3WXL CONTINUOUS DUTY HARD DRIVE DEGAUSSER WITH CASE/
HD64F2357 VTE14, Package TQFP-120, Date: 0B1, 600pcs.
HD64F2357F20 Microcontroller
HDMI OC-030M Fiber Optic Cables
HDR 2099108 USPP 2099108
HDS02.1-W040N-HS12-0 INDRAMAT CONTROLLERS REMANUFACTURED
HDS02.1-W040N-HS12-01-FW INDRAMAT CONTROLLERS REMANUFACTURED
HDS02.2-W040N INDRAMAT PLC MODULES REMANUFACTURED
HDS02.2-W040N-HS12 INDRAMAT DRIVES REMANUFACTURED
HDS03.2-W075N INDRAMAT DRIVES REMANUFACTURED
HDS03.2-W075N-HS12-01-FW INDRAMAT DRIVES REMANUFACTURED
HDS03.2-W075N-HS32-01-FW INDRAMAT DRIVES REMANUFACTURED
HDS03.2-W075N-HS45-01-FW INDRAMAT DRIVES REMANUFACTURED
HDS03.2-W100N-HS12-01-F INDRAMAT DRIVES REMANUFACTURED
HDS03.2-W100N-HS12-01-FW INDRAMAT DRIVES REMANUFACTURED
HDS04.2-W200N-HS79-0 INDRAMAT CONTROLLERS REMANUFACTURED
HDSIOC ROLLER B NOVELLUS 02-308058-00 VERSION 4.72
HDW SEBA KMT EZ-RESTORE LOCATOR L K~
HE697BEM600 Horner Electric GE Fanuc PLC I/O Controller
HEADER, 1.27MM, H:1.75MM, SMT, 50WAY, 15 11 050 2601000 2066957
HEADER, 1.27MM, H:1.75MM, SMT, 68WAY, 15 11 068 2601000 2066958
HEADER, 1.27MM, H:1.75MM, SMT, 80WAY, 15 11 080 2601000 2066959
HEADER, 1.27MM, H:3.25MM, SMT, 26WAY, 15 12 026 2601000 2066961
HEADER, 1.27MM, H:3.25MM, SMT, 50WAY, 15 12 050 2601000 2066962
HEADER, 1.27MM, H:3.25MM, SMT, 68WAY, 15 12 068 2601000 2066963
HEADER, 1.27MM, H:3.25MM, SMT, 80WAY, 15 12 080 2601000 2066964
Headers & Wire Housings 40P OPEN END PLUG 4640-6300 (50)
HEAT TIMER HWR USPP HWR
HEAT TIMER HWR-Q-G NSPP HWRQG
HEATSHRINK, 2:1, 76.2MM, 60M, TF21 76,2/38,1 BK 2070907
