Advantech MOS-1120Y-1402E handleiding
Handleiding
Je bekijkt pagina 32 van 34
MOS-1120Y/1121Y Series User Manual 24
5.3 RS-485 Signal Wiring
The RS-485 standard supports half-duplex communication. This means that just two
wires are needed to both transmit and receive data. Handshaking signals (such as
Request-To-Send signals) are normally used to control the direction of the data flow
and to switch transmissions accordingly. In RS-485 mode, MOS-1121Y cards auto-
matically sense the direction of the data flow and switch the transmission direction,
thereby eliminating the need for handshaking. This means users can build an RS-485
network with just two wires. This RS-485 control is completely transparent to the
user. The software written for half-duplex RS-232 functions without requiring any
modification.
Termination Resistor Setup
If necessary, termination resistors can be installed for impedance matching. MOS-
1121Y cards have mounting spaces for termination resistors, but no resistors are
installed at the factory. Depending on the application, users may need to solder on a
single resistor to handle the DATA+/DATA- pair (and a corresponding resistor on the
other end of the connection). The value of the resistor should equal the characteristic
impedance of the signal wires (approximately 120 Ohms or 300 Ohms).
Bekijk gratis de handleiding van Advantech MOS-1120Y-1402E, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Advantech |
| Model | MOS-1120Y-1402E |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 2822 MB |
