OPTO 22 G4LC32ISA-LT, Руководство пользователя

Страница: 31 / 50

G4LC32ISA-LT User’s Guide 3-15
CONNECTING TO I/O UNITS
The built-in RS-485/422 COM0 or COM1 port can be used as a serial link to communicate with digital
or analog remote I/O units. One method for doing this is to use an Opto 22 P/N G4IOR I/O remote
interface as illustrated in Figure 3-14. This method allows the use of Opto 22 standard I/O equipment
(G4 panels, cables, etc.). Refer to the
Mistic Installation Guide (Opto 22 form 595) for more details.
Figure 3-14 shows a 2-wire RS-485 shielded connection from COM0 on the G4LC32ISA-LT to the
G4IOR Remote Interface block. Connect pin 1 (TX/RX+) to G4IOR “TH+,” pin 2 (TX/RX-) to G4IOR “TH-
,” and pin 3 to “COM.” If you are using the interrupt lines, connect pin 6 to “IRQ+” and pin 7 to “IRQ-.”
Figure 3-14: Communication to a remote interface
INSTALLATION AND SETUP