Manuale d’uso / di manutenzione del prodotto RS-422 del fabbricante ATEN Technology
Vai alla pagina of 22
.
FCC Information This equipme nt has been tes ted and found to comply with the limits for a Class B d igital d evice, purs uant to Part 1 5 of the FCC Ru les. These lim its are designed t o provide rea sonable pr otection aga inst harmful interfer ence in a residenti al installa tion.
- 3 - ic485ai User Manu al Online Registration T elephone Sup port T echnical Support For international online technical support – i ncluding troubleshooting, documentation, and software updates: http://support. aten.com For North American technical support: International h ttp://support .
- 4 - Pa c k a g e C o n t e n t s The RS232 / RS485 Interface Converter package contains the following items: 1 IC485AI Bidirectional Isolate d Converter 1 Power Adapter 1 User Manual Check to make sure t hat all the components are present and that nothing got damaged in shipping.
- 5 - Overview Although RS-232 serial ports are found on almost every computer , becau se of their slow transmission speeds, limited range, and limi ted networking capabilities, they are not an effective solution for industrial strength long distance communications systems.
- 6 - Cable distance of up to 1200 m (4000 ft.) Compact size Components T op view: 1. S tatus LEDs RTS: Lights to indicate that R TS has been pulled high. TxD: Flashes when data transmission occurs. 2. RS-422 / RS-485 T erminal Block 3.
- 7 - Bot tom V iew: 1. DIP Switch This eight segment DIP Switch, located on the unit’s bottom panel, is used to configure the switch’s operating p arameters.
- 8 - DIP Switch Configuration The IC-485AI’s settings for Baud Rate, Data Format, and RS-422 / RS-485 Mode are configured b y setting the eight se gment DIP Switch located on its bottom panel Note: When you change any of the DIP Switch settings, you must reset the device by pow ering it off, then powering it on again.
- 9 - SW 5-6: Data Format These two switch segments configure the bit settings for S tart, Data, Parity , and S top. Note: The default is 10 bits (1 Start; 8 Data; 0 Parity; 1 Stop). Unless you have a special reason to change this, we recommend that you leave it as is.
- 10 - Operating Modes The IC-485AI supports three operating modes: Point-to-Point; Multidrop; and Simplex. Point-to-Point and Mu ltidrop can be configured for Fu ll or Half Dupl e x.
- 11 - 2. Point-to-Point 2 Wire Half Duplex Point-to-Point Half Duplex uses straight through two wire cabling, as shown in the diagra m below . For both IC-485AI units, set the unit to DCE or DTE depending on what type of devi ce the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
- 12 - 1. Multidrop Full Duplex Multidrop Full Duplex uses reverse fo ur wire cabling, to link all the connected IC-485AI units: For all IC-485AI units, set the unit to DCE or DTE depending on what type of devi ce the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
- 13 - 2. Multidrop Half Duplex Multidrop Half Duplex uses reverse two w ire cabling, to link all the connected IC-485AI units: For all IC-485AI units, set the unit to DCE or DTE depending on what type of devi ce the IC-485AI will plug into (if it will plug into a DCE device, configure it for DTE, and vice versa).
- 14 - Simplex A Simplex configuration is one in which more than two devices are linked for commu nication using several IC-485AI units in a manner similar to Multidrop. The difference is that in a Simplex configuration, the Master device can only talk, and the Slave devices can only listen.
- 15 - Installation 1. Make sure that all the devices you will be connecting up are powered of f. 2. Set each IC-485AI’s configuration switches accordin g to the information provid ed in the Switch Configuration and Operating Modes sections. 3. Plug the IC-485AI’s DB-25 female connector into the computer’s RS-232C por t.
- 16 - RS-422 / RS-485 Inst alla tion Diagr ams RS-422 Full Duplex Note: When the distan ce between both ends of the installation is large and/o r the transmitted si gnals are unstable, insert 120 Ω terminal resistors between pins 1 and 2 an d between pins 3 and 4 on the terminal blo cks of the two units at each en d of the instal lation.
- 17 - Appendix T erminal Block Pin As signments Circuit T est T o test the IC-485AI’s internal circuits, connect a dumb terminal to the unit and do the following: 1. Set the DCE / DTE switch to the opposite of the terminal. 2. Set all DIP Sw itch segments to ON .
- 18 - RS-485 Oper a tion Mode Flow Char ts RTS Co n tr o l M o de The IC-485AI operates in RS-4 85 RTS Control Mode when both SW7 and SW8 are set to OFF .
- 19 - Au t o S en d D at a M o d e The IC-485AI operaties in RS-485 Auto Send Data Mode when SW7 is set to OFF , and SW8 is set to ON . In this mode, the status of t he bus li ne is auto-detected in order to prevent more than one signal on the line.
- 20 - DCE / DTE Connection Description D CE DTE DCE DTE DB- 9 DB-9 DB-25 DB-25 1 1 (PG) 1 1 2 3 3 2 2 3 3 2 2 .
- 21 - Specifica tions Function Specification Power Consumption DC 9V ; 900mW (max.) Data Rate Up to 1 15.2 Kbps under 1200 m (4000 ft.) Connectors 1 x DB-25 female (RS-232); 1 x 4 Post T erminal Bloc.
- 22 - T roubleshooting Limited W arr anty IN NO EVENT SHALL THE DIRECT V E NDOR’S LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FROM THE DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQ UENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, DISK OR ITS DOCUMENTATION.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il ATEN Technology RS-422 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del ATEN Technology RS-422 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso ATEN Technology RS-422 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul ATEN Technology RS-422 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il ATEN Technology RS-422, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del ATEN Technology RS-422.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il ATEN Technology RS-422. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo ATEN Technology RS-422 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
