This 2-in-1 USB KVM cables are designed to connect a USB computer to the TRENDnet TK-803R and TK-1603R KVM switches. These cables consist of a USB keyboard/mouse cable and monitor cable bonded into a single device. Monitor: VGA/SVGA HDB 15-pin Male to Male Keyboard/Mouse: USB 1.1 Type A Connect computers with VGA and USB ports to a TRENDnet TK-803R, TK-804R, TK-1603R or TK-1604R KVM switch Length:3.1m Color: black
TRENDneti TK-C15 15-jalasel KVM kaablil on kõik pistikud, mida vajad klaviatuuri, monitori ja hiire ühendamiseks ning võimaldab sul viia kõik need seadmed KVM switchist, süle- või lauaarvutist kuni 15 jala kaugusele. Koos TRENDneti TK-200 2 pordiga, TK-400 4 pordiga ja TK-801R 8 pordiga KVM switchiga oled teinud parima valiku mitme PC haldamiseks vaid ühe klaviatuuri, monitori ja hiire abil.Pikkus: 4,5 m, Kõrgekvaliteediline KVM kaabel (UL2919 VGA monitori jaoks).Klaviatuur & hiir: PS/2 tüüpi 6 pi
Antud tester võimaldab:Testida patch kaablite PIN korrektsust - 10/100/1000Base-T, 10Base-2 (coax), RJ-11/RJ-12/RJ-45, EIA/TIA-356A/568A/568B ja Token Ring Patchidel Testida USB ja IEEE 1394 kaableid kaasas oleva adapteri abil Sisse ehitatud toon generator, mille abil saab leida õige kaabli kiu standartse Tone Probe abilTestida maandust või kaabli varjestustKontrollida kaablite ühendust, katkestust, lühist ja paaride korrektsustTestida kaableid kuni 300 meetritAuto-Skaneerimine või Manual-Skaneerimise
TU2-ET100 on kiire USB võrguadapter, mis võimaldab sul luua hetkega USB toega laua- või sülearvutist ühendus 10/100 Mbps kohtvõrguga. Seade on ühilduv USB 2.0 ja tagasiühilduv USB 1.0 ja 1.1 standarditega, selle abil saad jagada faile ning printereid ja kasutada interneti püsiühendust, et tutvuda väärtuslike veebiressurssidega.Võimalused Ühildub USB 2.0, 1.1 ja 1.0 spetsifikatsioonidega Ühildub IEEE 802.3 ja IEEE 802.3u spetsifikatsioonidega ANSI/IEEE 802.3 automaatse kiirusevaliku spetsifika
FEATURESCompliant with USB 1.1 SpecificationsCompliant with IEEE 1284 (Bi-Directional Parallel) InterfaceSupports Suspend/Normal Power Management ModesSupports Data Transfer Rate up to 12Mbps SpeedCompliant with Windows 98(SE)/ME/2000/XP (32/64-bit) /Vista (32/64-bit)Eliminate Manual or Automatic Parallel Switch BoxesSupports Plug & Play and Easy Installation
Gigabit ready rack mount 24-port panel Cat6 patch panels deliver a steady 250Mhz connection to copper Gigabit switches Ideal solution for Ethernet, Fast Ethernet and Gigabit applications Use with TRENDnet TC-PDT Punch Down Tool
TRENDnet understands the meaning of MOBILITY! When you’re on the go and need to take your work with you, TRENDnet’s "One of a Kind" Notebook, Laptop carrying case is the way to carry it in. This water resistance, easy to clean, and extremely durable case is fully padded for your Notebook PC protection. With many compartments for your disks, CD’s, business cards, pens, pencils, and papers, TRENDnet’s case is the all-in-one, get up and go. Carry all your network belongings in one convenient notebook bag!- Removable, adjustable, shoulder strap with anti-slip backing.- Pockets for disks, CD’s, business cards, pens/pencils.- Slip on luggage feature.- Interior pocket for files and folders.- Fully padded case and handgrip.- Gusseted front compartment for printer, digital items, and accessories.- Velcro secured exterior pocket.- Dual pulling, self-healing nylon zipper with lock loops.- Durable handgrip.- Water resistance.- Easy to clean.- Extremely durable.Maksimaalne ekraanisuuruse sobivus39,1 cm (15.4")Karbi tüüpPortfellToote värvMustMaterjalNailon
2-pordine kompaktne DVI USB KVM switch (audio ja mikrofoniga)Toetab PC, Macintosh G3/G4, iMAC arvuteidVideo resolutsioon kuni 1920 x 12002-aastane garantii
Portide arv: 4 PC port: 1 x VGA(F) 1 x 3.5mm stereo pesa (audio) 1 x 3.5mm stereo pesa (mikrofon)Konsool: 2 x USB 1.1 (hiir/klaviatuur)1 x VGA (F)1 x 3.5mm stereo pesa (audio) 1 x 3.5mm stereo pesa (mikrofon)Kaablid: komplektis VGA: 2048 x 1536 OP süsteemide tugi: Windows 98(SE)/ME/2000/XP/2003 Server, Linux ja Mac OS Räckitav: EI, Garantii: 2 aastat
Portide arv: 8 PC port: 1 x VGA(F)Konsool: 1 x USB(A)/ PS/2 (hiir) 1 x USB(A)/ PS/2 (klaviatuur) 1 x VGA (F)Kaablid: - VGA: 2048 x 1536 OP süsteemide tugi: Windows 98SE / ME / 2000 / XP / 2003 Server / Vista, Linux, Mac OS Toiteplokk: 9V DC 1A, väline, Räckitav: JAH, Garantii: 2 aastat
SC-type multi-mode fiber port connects over distances of up to 2km (1.2 miles) 10/100Base-TX port supports Auto-Negotiation, Auto-MDIX and Full-Duplex mode Functions as a stand alone converter or with the TFC-1600 fiber chassisCompliant with IEEE 802.3 10Base-T and IEEE 802.3u 100Base-TX / 100Base-FX standards1 x 10/100Base-TX auto-negotiation RJ-45 portAuto-negotiation 10/100Mbps connection speed and Half/Full-duplex mode on TX portAuto MDIX for 10/100Base-TX port1 x 100Mbps fiber port with multi-mode SC-type connectorStatus LED indicators for Power, Link/Activity, Full-Duplex, and SpeedDip-switch for full and half duplex selection on fiber portWall mountableOptional 19” system chassis with redundant power supply (TFC-1600), holds up to 16 TFC series Media Converters3-year limited warranty
Konverterit TFC-110S60 on võimalik kasutada nii shassi süsteemiga TFC-1600 , kui ka eraldiseisva konverterina. Single Mode SC-Tüüpi konverter toetab distantsi kuni 60km.IEEE 802.3 10Base-T ja IEEE 802.3u 100Base-TX / 100Base-FX tugi1 x 10/100Base-TX auto-negotiation RJ-45 port1 x 100Mbps FO port ( Single-Mode SC-Tüüp )Half / Full-Duplex reziimi valikLED indikaatorid: Toide, Link/Activity, Full-Duplex ja kiirusSeinale kinnitamise võimalus5-aastane garantiiTarneaeg 10-14 päeva.
1000Base-T 1 1000Base-LX 1 SC 1 RJ45 1 Cable distance 10km Power supply requirements 7.5V DC, 1A external power adapter Shipping box quantity 1 Unit Brutto Volume 0,001752 cubm Unit Net Weight 0,354 kg Unit Gross Weight 0,526 kg
1000Base-T 1 1000Base-LX 1 SC 1 RJ45 1 Cable distance 10km Power supply requirements 7.5V DC, 1A external power adapter Shipping box quantity 1 Unit Brutto Volume 0,001752 cubm Unit Net Weight 0,354 kg Unit Gross Weight 0,523 kg
Intelligent 10/100Base-TX to 100Base-FX Single Mode SC Fiber Converter TFC-110S60i (Version A1.1R) SC-type single-mode fiber port connects over distances of up to 60km 10/100Base-TX port supports Auto-Negotiation, Auto-MDIX and Full-Duplex mode Supports port level SNMP management Functions as a stand alone converter or with the TFC-1600 fiber chassis The TFC-110S60i Intelligent Fiber Converter works with the TFC-1600 chassis system or as standalone unit. This converter is a Single Mode SC-Type fiber converter that supports SNMP management and spans distances of up to 60km (37.2 miles). Ports include 1 x 10/100Base-TX (RJ-45) port and 1 x 100Base-FX fiber port (SC-Type). Compliant with IEEE 802.3 10Base-T and IEEE 802.3u 100Base-TX / 100Base-FX standards One 10/100Base-TX auto-negotiation RJ-45 port Auto MDIX for 10/100Base-TX port and one 100Mbps fiber port with single-mode SC-type connector Provides Dip switch to set: Fiber (FDX/HDX), Ethernet (Forced/Auto-Negotation), Ethernet Speed (10M/100M), LLR (Enable/Disable), LLCF (Enable/Disable) Half / Full-Duplex mode selector on Fiber port Support LLCF (Link Loss Carry Forward, Link Pass Through) Support LLR (link Loss Return) for FX port Monitor and configure Ethernet or Fiber’s duplex mode, speed, LLCF, LLR, and receive link down information via management module (TFC-1600MM) and chassis (TFC-1600) Status LED indicators for Power, Link/Activity, Full-Duplex, Link Fail, and Speed Wall-Mountable Optional 19” system chassis with redundant power supply (TFC-1600), holds up to 16 TFC series Media Converters 3-year limited warranty
The TFC-110S15 Fiber Converter works with the TFC-1600 chassis system or as a standalone unit. This converter is a Single Mode SC-Type fiber converter spanning distances up to 15km (9.3 miles). Ports include 1 x 10/100Base-TX (RJ-45) port and 1 x 100Base-FX fiber port (SC-Type).- Compliant with IEEE 802.3 10Base-T and IEEE 802.3u 100Base-TX / 100Base-FX standards- One 10/100Base-TX auto-negotiation RJ-45 port- Auto-negotiation 10/100Mbps connection speed and Half/Full-duplex mode on TX port- Auto MDIX for 10/100Base-TX port- One 100Mbps fiber port with Single-mode SC-Type Connector- Half / Full-Duplex mode selector on Fiber port- Status LED indicators for Power, Link/Activity, Full-Duplex, and Speed- Wall-Mountable- Optional 19” system chassis with redundant power supply (TFC-1600), holds up to 16 TFC series Media Converters
Intelligent 1000Base-T to 1000Base-LX Dual Wavelength Single Mode SC Fiber (40 km / 24.85 miles) TFC-1000S40D3 (Version C1.1R) Must use with TFC-1000S40D5 SC-type dual-wavelength single-mode fiber port connects over distances of up to 40 km (24.85 miles) 1000Base-T Gigabit copper port supports Full-Duplex mode Supports port level SNMP management Functions as a stand alone converter or with the TFC-1600 fiber chassis The TFC-1000S40D3 Bi-Directional Intelligent Fiber Converter works with the TFC-1600 chassis system or as a standalone unit. This converter is a Dual Wavelength Single Mode SC-Type fiber converter that supports port-based SNMP reporting and spans distances up to 40 km (24.85 miles). This module must be used with the TFC-1000S40D5 module. Ports include 1 x 1000Base-T (RJ-45) port and 1 x 1000Base-LX (SC Simplex Type) port. Compliant with IEEE 802.3ab 1000Base-T and IEEE 802.3z 1000Base-LX standards 1 x 1000Base-T RJ-45 port 1 x 1000Base-LX single-mode bi-directional simplex-SC type fiber port Provides Dip switch to set: Fiber (Forced / Auto-Negotiation), LLR (Enable / Disable) Support LLCF (Link Loss Carry Forward, Link Pass Through) Support LLR (Link Loss Return) for FX port Monitor and configure Ethernet or Fiber’s duplex mode, LLR, port on / off and receive link down information via management module TFC-1600MM and chassis TFC-1600 Status LED indicators for Power and Link / Activity Wall mountable Optional 19” system chassis with redundant power supply (TFC-1600), holds up to 16 TFC series Media Converters 3-year limited warranty
Peab kasutama koos TFC-1000S40D3-ga. SC-tüüpi kahe lainepikkusega ühemoodiline kiudoptiline port ühendab kuni 40 km (24,85 miili) kaugusele. 1000Base-T Gigabit vaskport toetab täisdupleksrežiimi Toetab pordi tasandi SNMP-haldust Toimib iseseisva muundurina või koos TFC-1600 kiudoptilise šassiiga TFC-1000S40D5 kahesuunaline intelligentne kiudkonverter töötab koos TFC-1600 šassiisüsteemiga või iseseisva seadmena. See muundur on kahe lainepikkuse ühe režiimiga SC-tüüpi kiudkonverter, mis toetab pordipõhist SNMP-aruandlust ja ulatub kuni 40 km (24,85 miili) kaugusele. Seda moodulit tuleb kasutada koos mooduliga TFC-1000S40D3. Pordid on 1 x 1000Base-T (RJ-45) port ja 1 x 1000Base-LX (SC Simplex-tüüpi) port. Vastab standarditele IEEE 802.3ab 1000Base-T ja IEEE 802.3z 1000Base-LX. 1 x 1000Base-T RJ-45 port 1 x 1000Base-LX ühemoodiline kahesuunaline simplex-SC-tüüpi kiudoptiline port Pakub Dip lüliti seadistamiseks: Fiber (Forced / Auto-Negotiation), LLR (Enable / Disable). Toetab LLCF (Link Loss Carry Forward, Link Pass Through). Toetab LLR (link Loss Return) FX-porti jaoks. Jälgib ja konfigureerib Ethernet või Fiber'i dupleksrežiimi, LLR, port on / off ja saab link down teavet juhtimismooduli TFC-1600MM ja šassii TFC-1600 kaudu. Toite ja ühenduse / aktiivsuse oleku LED-indikaatorid Seinale paigaldatav Valikuline 19-tolline süsteemikere koos üleliigse toiteallikaga (TFC-1600), mahutab kuni 16 TFC-seeria meediamuundurit.
The TFC-1600MM provides Chassis SNMP reporting and supports port based management for the TFC-1600, 16-Bay Fiber Converter Chassis System. Instant access to cooling fan and power supply status reports. Web browser based management via Ethernet port or Command Line Interface management via RS-232 serial port.Andmeedastuskiirus (maksimaalne)100 Mbit/sKaabeldustehnoloogia10Base-T, 100Base-TXÜhenduvustehnoloogiaJuhtmega ühendatudAndmelüli protokollidEthernet, Fast Ethernet, RS-232KujutegurPlug-inPacket transfer speed10/100 MbpsTäisdupleksJahI/O-pordid1x Ethernet 10Base-T/100Base-TX - RJ-451x RS-232
TFC-1000 series Fiber Media Converter transforms 1000Base-T (Copper Gigabit) media to 1000Base-SX/LX (Mini- GBIC) media and vice versa. The 1000Base-T port supports fullduplex Gigabit connection at wire speed with RJ45 connector. The Mini-GBIC connection supports shortwave (SX) or longwave (LX) laser optic with multi-mode or single-mode Mini-GBIC module. This converter will give your Copper Gigabit connection the ability to interface with fiber connection over a great distance. With the optional 16-slot EIA-19” rack-mount chassis, the TFC series converters are the perfect solutions for various fiber media conversions for your network. - Compliant with IEEE 802.3ab 1000Base-T, IEEE 802.3z 1000Base-SX/LX Gigabit Ethernet Standards- Provides One 1000Base-T Port, one 1000Base-SX/LX Mini-GBIC Slot- Support Full-Duplex and Auto-Negotiation Mode for Fiber Port- Provide Dip Switch to settings: Fiber (Auto/Manual), LLR (Enable/Disable)- Optional 19” Fiber Module Chassis (TFC-1600) holds up to 16 Media Converters- Hot PluggableManagement Features - Support LLCF (Link Loss Carry Forward, Link Pass Through)- Support LLR (Link Loss Return) for SX/LX Port- Monitor the Status of Duplex/Link with TFC-1600 and TFC-1600MM- Set Duplex force, LLCF on/off, LLR on/off for SX/LX, ports on/off with TFC-1600 and TFC-1600MM- Provides Link Down Source Port Information
Intelligent 1000Base-T to 1000Base-LX Single-Mode SC Fiber Converter (20km/12.4miles) TFC-1000S20 (Version C1.0R) SC-type single-mode fiber port connects over distances of up to 20km (12.4 miles) 1000Base-T Gigabit copper port supports Full-Duplex mode Supports port level SNMP management Functions as a stand alone converter or with the TFC-1600 fiber chassis The TFC-1000S20 Intelligent Fiber Converter works with the TFC-1600 chassis system or as a standalone unit. This converter is a Single Mode SC-Type fiber converter that supports SNMP and spans distances up to 20km (12.4miles). Ports include 1 x 1000Base-T (RJ-45) port and 1 x 1000Base-LX (SC-Type) port. Compliant with IEEE 802.3ab 1000Base-T and IEEE 802.3z 1000Base-LX standards 1 x 1000Base-T RJ-45 port 1 x 1000Base-LX single-mode SC type fiber port Provides Dip switch to set: Fiber (Forced/Auto-Negotiation), LLR (Enable/Disable) Support LLCF (Link Loss Carry Forward, Link Pass Through) Support LLR (link Loss Return) for Fiber port Monitor and configure Ethernet or Fiber’s duplex mode, LLR, port on/off and receive link down information via management module TFC-1600MM and chassis TFC-1600 Status LED indicators for Power and Link/Activity Wall mountable Optional 19” system chassis with redundant power supply (TFC-1600), holds up to 16 TFC series Media Converters 3-year limited warranty
Intelligent 1000Base-T to 1000Base-LX Single-Mode SC Fiber Converter (50km/31miles) TFC-1000S50 (Version C1.0R) SC-type single-mode fiber port connects over distances of up to 50km (31 miles) 1000Base-T Gigabit copper port supports Full-Duplex mode Supports port level SNMP management Functions as a stand alone converter or with the TFC-1600 fiber chassis The TFC-1000S50 Intelligent Fiber Converter works with the TFC-1600 chassis system or as a standalone unit. This converter is a Single Mode SC-Type fiber converter that supports SNMP and spans distances up to 50km (31miles). Ports include 1 x 1000Base-T (RJ-45) port and 1 x 1000Base-LX (SC-Type) port. Compliant with IEEE 802.3ab 1000Base-T and IEEE 802.3z 1000Base-LX standards 1 x 1000Base-T RJ-45 port 1 x 1000Base-LX single-mode SC type fiber port Provides Dip switch to set: Fiber (Forced/Auto-Negotiation), LLR (Enable/Disable) Support LLCF (Link Loss Carry Forward, Link Pass Through) Support LLR (link Loss Return) for Fiber port Monitor and configure Ethernet or Fiber’s duplex mode, LLR, port on/off and receive link down information via management module TFC-1600MM and chassis TFC-1600 Status LED indicators for Power and Link/Activity Wall mountable Optional 19” system chassis with redundant power supply (TFC-1600), holds up to 16 TFC series Media Converters 3-year limited warranty
The TFC-1000S70 Intelligent Fiber Converter works with the TFC-1600 chassis system or as a standalone unit. This converter is a Single Mode SC-Type fiber converter that supports SNMP and spans distances up to 70km (43.5 miles). Ports include 1 x 1000Base-T (RJ-45) port and 1 x 1000Base-LX (SC-Type) port.Andmeedastuskiirus (maksimaalne)1000 Mbit/sKaabeldustehnoloogia1000Base-T, 1000Base-LXLainepikkus1300 nmLED-indikaatoridVõimsusVõimsustarve (tüüpiline)7,2 WKasutamistemperatuur (T-T)0 - 40 °CHoiustamistemperatuur (T-T)-25 - 70 °CSuhteline õhuniiskus kasutamisel (H-H)10 - 90 protsentiSuhteline õhuniiskus (H-H) hoiustamisel5 - 90 protsentiAndmelüli protokollidCSMA/CDPistmik(ud)SC
Pikendab USB porti kuni 50m kaugusele läbi CAT5/5e/6 kaabli USB 1.1 tugi , kiirus kuni 12Mbps Ei vaja eraldi toidet Kaabli pikkustel kuni 40m on võimalik kasutada ka USB hub Saatja: A USB pistik & RJ-45 pesa Vastuvõtja: A USB pesa & RJ-45 pesa
Extends keyboard, mouse, and monitor distances up to: 150m (490ft.) at 1280 x 1024 resolution and 100m (328ft.) at 1600 x 1200 resolution Controls multiple servers remotely when used with a KVM switch Displays high quality resolution up to 1600 x 1200 pixels Provides local and remote console ports to access one computer Connect the local console (transmitter) to the remote console (receiver) with an Ethernet cable Cat. 5, Cat. 5E or Cat. 6 Ethernet cable compliant Fine-tune resolution on the remote co
The TFC-1000MSC Intelligent Fiber Converter works with the TFC-1600 chassis system or as a standalone unit. This converter is a Multi Mode SC-Type fiber converter that supports SNMP and spans distances up to 550m (1,800 ft.). Ports include 1 x 1000Base-T (RJ-45) port and 1 x 1000Base-SX (SC-Type) port.- Compliant with IEEE 1000Base-T and 1000Base-SX- One 1000Base-T RJ-45 port- One 1000Base-SX Port w/ SC-Type Connector- Status LED indicators for Power, Link/Activity, Full-Duplex, and Speed- Wall-Mountable- Optional 19” system chassis with redundant power supply (TFC-1600), holds up to 16 TFC series Media ConvertersLink Down Source Port Information
To prevent Ethernet devices from possible damage caused by surge voltages as a result of lightning strikes, PLANET has released a new Ethernet Lightning Arrest Box especially made in the current Ethernet environment. The ELA-100 Ethernet Lightning Arrest Box provides two passive 10 / 100 / 1000Base-T interfaces for connection of two Ethernet devices and one ground position for earth. The ELA-100 Ethernet Lightning Arrest Box is the ideal solution to preventing damages to Ethernet devices from surge voltages caused by lightning strikes. Outdoor Installation of Ethernet Lightning Arrest Box When installing the ELA-100 in an outdoor place with shelter, the Ethernet Lightning Arrest Box must be earthed or else the Ethernet Lightning Arrest Box may get electric shock and damage. Then connect two Ethernet devices to the two passive 10/100/1000Base-T ports (protected port and un-protected port) of Ethernet Lightning Arrest Box for lightning strike prevention.
See labidas omab õhukest tera ja sobib ideaalselt kergeks kaevamiseks parkides, mis võimaldab müntide otsimisel viisakaid auke lõigata. Mugava käepidemega ja kaitsva käekaitsega. Kerge, kuid tugev konstruktsioon.
Support VGA, SVGA and Multisync display Supports resolution up to 1920 x 1440 Simultaneous monitor display 2-port video splitter in metal enclosure Daisy-chain support up to 3 levels for scalable monitor port capacity Enhance video signal with a maximum cable distance up to 65 meters (210 feet) Simultaneous monitor display Power LED indicator for power status monitoring Plug-and-play, no extra software needed 2-Year Warranty
Features and Benefits Versatile socket operation modes, including TCP Server, TCP Client, UDP Patented ADDC® (automatic data direction control) for 2-wire and 4-wire RS-485 Cascading Ethernet ports for easy wiring (applies only to RJ45 connectors) Redundant DC power inputs Warning by relay output and e-mail 10/100BaseTX (RJ45) or 100BaseFX (single mode or multimode with SC connector) IP30-rated housing Overview NPort® IA device servers provide easy and reliable serial-to-Ethernet connectivity for industrial automation applications. The device servers can connect any serial device to an Ethernet network, and to ensure compatibility with network software, they support a variety of port operation modes, including TCP Server, TCP Client, and UDP. The rock-solid reliability of the NPort® IA device servers makes them an ideal choice for establishing network access to RS-232/422/485 serial devices such as PLCs, sensors, meters, motors, drives, barcode readers, and operator displays. All models are housed in a compact, rugged housing that is DIN-rail mountable. • LAN Interface Number of Ports 2 Speed 10/100 Mbps, Auto MDI/MDIX Connector(s) 8-pin RJ45 Magnetic Isolation Protection 1.5 KV built-in • Optical Fiber Interface Fiber Port(s) 100 BasedFX, SC connector Distance Multi mode: 0 to 2 km, 1310 nm (62.5/125 µm, 500 MHz*km) Single mode: 0 to 40 km, 1310 nm (9/125 µm, 3.5 PS/nm*km ) Min. TX Output -20 dBm (Multi mode), -5 dBm (Single mode) Max. TX Output -14 dBm (Multi mode), 0 dBm (Single mode) Sensitivity -34 to -30 dBm (Multi mode), -36 to -32 dBm (Single mode) • Serial Interface Serial Standards RS-232/422/485 Number of Ports NPort® IA5150: 1 NPort® IA5250: 2 Connectors NPort® IA5150: 8-pin RJ45 for RS-232, Terminal Block for RS-422/485 NPort® IA5250: DB9 male RS-485 Data Direction Control ADDC® (automatic data direction control)