M4RTU/M4 I/O User’s Guide
51
INSTALLATION AND SETUP
RS-485 COM1
4-Wire Mode Using an AC37
If you are using an Opto 22 AC37, connect the end of the cable with a male 9-pin D-shell connector to the
converter and the other end with a pluggable terminal block to the M4RTU/M4 I/O. Refer to Figure 3-18 and
Figure 3-19 for wiring details.
2-Wire Mode Using an AC37
The AC37 also supports a 2-wire mode. Refer to the following diagram for wiring.
Figure 3-18: RS-485 Wiring to a Host PC in 4-Wire Mode Using an AC37
Figure 3-19: RS-485 Wiring to a Host PC in 2-Wire Mode Using an AC37
Summary of Contents for Modular M4RTU
Page 6: ...6 M4RTU M4 I O User s Guide TABLE OF CONTENTS...
Page 74: ...74 M4RTU M4 I O User s Guide FIELD WIRING...
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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