1771-OZ

1771-OZ

1771-OZ

、高速与低速：数据的传输速率

    串行通信的传输受到通信双方配备性能及通信线路的特性所左右，收、发双方必须按照同样的速率进行串行通信，即收、发双方采用同样的数据传输率。数据传输率批量的是串行通信中每一秒所传送的数据位数，单位是bit/s，简写为bps。经常可以看到产品的规格书上都写着4800bps、9600bps、19200bit/s、38400bit/s······，所指的就是数据传输率。在异步串行通信中，每传送一个字符需要8位，如果采用数据传输率4800bit/s进行传送，则每秒可以传送600个字符。

    就仪器或工业场合来说，4800bit/s、9600bit/s是最常见的数据传输率，现在的个人计算机所提供的串行端口的数据传输率最高都可达到115200bit/s，若传输距离较近而设备也提供时，使用最高的数据传输率也可以。最高通信速率为19200bps的转换器我们归类为“低速”、最高通信速率为115200bps的转换器我们归类为“高速”。一般低速的隔离器无需供电，高速的隔离器需要5V供电，其中BS232HA可以达到最高500Kbps。

WYSE 9011866-02 KEYBOARD, IEPC, FRENCH

AMCC 9500S-4LP RAID CONTROLLER

AMCC 9550SX-8LP RAID CONTROLLER

AMC EXHAUST CLEANER, model: AMC610-10

SUN 540-5922 SEAGATE 3T373453FC 73GB

SUN SOLARIS 10 OPERATING SYSTEM N1 MANAGEMENT SOFTWARE

TDK Lambda Single Output DC Power Supply 24V RAX24-12R

SUN 0020772 Seagate ST39102LC 9.1GB UltraScsi 10K

SUN - Seagate ST336607LC 9V4006-043 36.7GB 10K RPM

SUN 370-4682-01 AC Power Adapter 14V 3A (GENUINE OEM)

PRECISE SENSOR 4863-45-GA-4WS-CE

SMC Pneumatic POSTTTION Manifold Solenoid Valve P/N #: S

Intel Gigabit CT desktop, model: EXPI9301CTBLK Single P

CISCO 10-2250 DS-SFP-FC-4G-MR

NORGREN DA/8032/X1/220 PNEUMATIC CYLINDER

HP Smart Array 5300 Quad Port Controller - p/n #171383-

Power Supply Single Output by Cosel U.S.A. Inc. - model

ADC KENTROX DataSMART - model: 688

HUBBELL HBL2416 NEMA L14-20 AC Flanged Outlet

Barber COLMAN HC-201 Duct Humidistat (Ref. #23177)

HITACHI DESKSTAR HDS724040KLA80 400GB 7200RPM& BRACKET

HEWLETT PACKARD J4113-60001 EXPANSION MODULE "2"

BANNER SENSOR Q12RB6R W/30

Seagate Barracuda 36ES 18.4 GB,Internal,7200 RPM (ST

STIHL Professional Hearing Protectors 0000-886-0402

BELKIN OMNIVIEW PRO2 8 PORT KVM SWITCH

Supermicro CSE RR2UE-AX Riser Card

NORTEL NETWORKS M3904 TELEPHONE

Alacritech SEN2102ET TNIC Accelerator - network adapter

HITACHI Deskstar HDS724040KLSA80 400GB 7200 RPM SATA

SIEMENS SIMATIC TERMINAL BLOCK 6ES7 193-1CL00-0XA0

DV REPEATER VP-332

LIGHT FIXTURE FOR DROP CIELING 48"X24"X5" W/TWO BALLAS

PROVON DISPENSER SOAP - MODEL # 2115-06 "QTY 6" 

3COM 3CSFP93 SFP TRANSCEIVER

AIRTROL VACUUM ELECTRIC SWITCH F-4200-X30 

3-Slot PCI 32bit Passive Riser Card (MITAC) - model: PC

GE Security 80-632-3X SIMON 3 STARTER PKG A1

SUN MICROSYSTEMS 370-5211-01 FINISAR 2GB TRANSCEIVER

SUN MICROSYSTEMS 370-5211-01 JDS UNIPHASE 2GB TRANSCEI

HEWLETT PACKARD HFBR-0528 Evaluation Kit

San Ace 60 Sanyo Denki fan 9GA0612P1G041

ABB SACE S1 S1N 30A 3 Pole 277/480VAC Circuit Breaker I

APPLIED MATERIALS P/N 3950-01029 SPRAY NOZZLE HH-TYPE 1

MAXTOR 160 GB ULTRA ATA/133 HARD DRIVE

Supermicro RSC-RR1U-ER rev 3.00 and RSR64_1U Rising Car

APPLIED MATERIALS P/N 3060-00275 BALL BEARING 12MM BORE

SMC FITTING KQ2T07-11 BAG OF 10 EACH

McMASTER-CARR SUPPLY #6423K5 BOLT DOWN VIBRATION MOUNT 

Weinschel Engineering Binary Step Attenuator

CISCO GLC-SX-MM 30-1301-02

FURNAS 45CA20AF DEFINITE PURPOSE CONTROLLER