M4RTU/M4 I/O User’s Guide
39
INSTALLATION AND SETUP
Serial Port Switches (COM1)
The M4RTU/M4 I/O base unit comes standard with one RS-485 serial port COM1. This port includes configuration
switches. The following diagram shows the serial port COM1 switches as they appear on the end cap of the
M4RTU/M4 I/O. See below for details on configuring these switches.
TERM IN/TERM OUT
This switch selects termination for the RS-485 port. In the IN position, the RS-485 lines are terminated and
biased. Terminate the port when it is physically the first or last unit in an RS-485 multi-drop serial network
application.
In the OUT position, the RS-485 lines will be floating. This setting should be used when the port is part of a
multi-drop serial network application and is not physically the first or last unit in the network. The default is
TERM IN.
2-WIRE/4-WIRE
This switch selects the wiring method used to connect to the RS-485 serial port. The choices are 2-wire and
4-wire. The default is 4-wire. If you are using COM1 as an RS-485 serial link (remote), select 2-wire mode.
Figure 3-7: Serial Port COM1 Switches on the M4RTU/M4 I/O
Содержание Modular M4RTU
Страница 6: ...6 M4RTU M4 I O User s Guide TABLE OF CONTENTS...
Страница 14: ...14 M4RTU M4 I O User s Guide INTRODUCTION Figure 1 3 M4RTU M4 I O Communications Configurations...
Страница 32: ...32 M4RTU M4 I O User s Guide INSTALLATION AND SETUP Figure 3 3 Installing the Power Supply on the M4RTU M4 I O...
Страница 74: ...74 M4RTU M4 I O User s Guide FIELD WIRING...
Страница 80: ...80 M4RTU M4 I O User s Guide PRODUCT SPECIFICATIONS...
Страница 82: ...82 M4RTU M4 I O User s Guide ADDRESS JUMPER CONFIGURATION...
Страница 86: ...86 M4RTU M4 I O User s Guide UPGRADING RAM AND FLASH EEPROM...
Страница 89: ...M4RTU M4 I O User s Guide 89 WORKSHEETS Figure F 3 M4RTUX I O Extender I O Module Worksheet...
Страница 91: ...M4RTU M4 I O User s Guide 91 WORKSHEETS Figure F 5 Field Wiring Worksheet Example 2...
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Страница 96: ...96 M4RTU M4 I O User s Guide PRODUCT SUPPORT...