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RS-232 to RS-422/485 Converter, DTE/DCE Compatible
RS-232 to RS-422/485 Converter
Remises de volume disponibles
Calendrier de remise sur volume
| Quantité | Prix unitaire |
|---|---|
| 1-9 | C$396.59 |
| 10-24 | C$376.76 |
| 25-49 | C$368.83 |
| 50-99 | C$352.97 |
| 100-199 | C$345.03 |
| 200+ | C$337.10 |
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Échec de l'enregistrement des configurations, cliquez sur le bouton Configurer Recommencer
- User Selectable RS-422 or RS-485
- RS-485 User Selectable 2 or 4-Wire Operation
- Intelligent Control of RS-485 Transmitter and Receiver
- Td and Rd LED Indicators
CAT-285 Options de modèles
Voir tous les modèlesModifiez ces spécifications pour commander un modèle différente. Toutes les combinaisons ne sont pas valides. Les options compatibles avec les sélections précédentes seront en gras.
*Les options en surbrillance ne sont pas compatibles. Veuillez sélectionner une combinaison différente.
Input Type
Output Type
Number of Ports
Description
The CAT-285 is a unique interface converter that can be configured by the user to convert either RS-422 or RS-485 to RS-232. When operating in RS-485 mode, the CAT-285 has an “intelligent” mode which provides control of the RS-485 line. When configured to operate as an RS-232 to RS-422 interface converter, the CAT-285 converts full duplex data, Td and Rd, between RS-232 and RS-422. As an RS-232 to RS-485 converter, the unit can be configured for either 2 or 4-wire operation. In either mode, the CAT-285 allows control of the transmitter so that multi-dropped operation can be accommodated. The CAT-285 can be configured to control its data flow in one of two ways. The first is via the use of RTS, pin 4, of the RS-232 port. In this case, the RS-485 transmitter will turn ON when RTS is turned on. When RTS is OFF, the CAT-285 is in the receive mode. In the 4-wire mode, the receiver is always on. The second method of controlling the RS-485 transmitter is to turn it on when Td data is applied to the RS-232 port.The receiver also operates differently depending on whether the mode is 2 or 4-wire. In the 2-wire mode, when no data is received by the RS-232 receiver, the RS-485 receiver is switched ON. When data is detected for transmission, the receiver is switched OFF. In the 4-wire mode, the RS-485 receiver is constantly ON while the transmitter is switched as required. The CAT-285 is equipped with a five position dip switch that is used to select the following: RS-422 mode: 4-wire RS-485 mode: 2-wire RS-485 mode: 4-wire RS-485 mode: controlled by RTS RS-485 mode: controlled by data 220 ohm terminator: in or out The CAT-285 is also equipped with a DTE/DCE switch to allow reversing pins 2 and 3 on the RS-232 interface. Td and Rd LED indicators help verify operation.
For complete product specifications see the Related Links section at the bottom of this page.
