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