54
M4RTU/M4 I/O User’s Guide
INSTALLATION AND SETUP
CONNECTING TO OPTO 22 I/O UNITS
The built-in RS-485 COM1 port can be used as a serial link (remote) to communicate with Opto 22 digital or
analog I/O. A M4SSER serial expansion card installed in the M4RTU/M4 I/O can also be used for this purpose.
One method for doing this is to use a Mistic 200 I/O Remote Interface board (G4IOR) as illustrated in Figure
3-20. This method allows the use of Opto 22 I/O equipment (G4 panels, cables, etc.).
Figure 3-20 shows a 2-wire RS-485 shielded connection from COM1 on the M4RTU/M4 I/O to the G4IOR
Remote Interface board. 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 3-20: Communications to a Remote Interface (G4IOR)
Note: Refer to cable
specifications in
Appendix B.
Updated: 12/18/00
Summary of Contents for Modular M4RTU
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Page 80: ...80 M4RTU M4 I O User s Guide PRODUCT SPECIFICATIONS...
Page 82: ...82 M4RTU M4 I O User s Guide ADDRESS JUMPER CONFIGURATION...
Page 86: ...86 M4RTU M4 I O User s Guide UPGRADING RAM AND FLASH EEPROM...
Page 89: ...M4RTU M4 I O User s Guide 89 WORKSHEETS Figure F 3 M4RTUX I O Extender I O Module Worksheet...
Page 91: ...M4RTU M4 I O User s Guide 91 WORKSHEETS Figure F 5 Field Wiring Worksheet Example 2...
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