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EXTERNAL DEVICES
External devices can be connected either with a direct serial connection or with an Internet Protocol connection. An overview of each type of connection is provided below; refer to the specific instructions provided for each type of external device in the following pages.
Direct Serial Connection
A direct serial connection means connecting the device to one of the COM ports on the
EXTERNAL DEVICE |
SERIAL DATA
Figure 24. Sample of a Direct Serial Connection for an External Device
The VMX300(-E) provides the following types of COM ports:
•RS-232: COM 1, COM 2
•RS-422: COM 3, COM 4
After installing system hardware, ensure that the device’s internal settings match the VMX300(-E) COM port serial communication settings. If they do not match, you must either
•configure the internal settings to match the VMX300(-E) COM port default settings, as identified in Table F, or
•change the VMX300(-E) COM port settings to match the device; instructions are provided in the Appendix on page 42.
Table F. Default Settings for VMX300(-E) COM Ports
Default Settings | |
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COM 1, COM 2 | |
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COM 3, COM 4 | |
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Table G provides the pin assignments for the
Table G.
PIN 2 | RX |
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PIN 3 | TX |
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PIN 5 | Ground |
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PIN 2 | Rx+ |
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PIN 3 | Tx- |
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PIN 5 | Ground |
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PIN 7 | Tx+ |
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PIN 8 | Rx- |
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27 |