Справочник Пользователя для Pelco VMX300-E

C1552M-C (7/07)

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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.

A direct serial connection means connecting the device to one of the COM ports on the VMX300(-E) rear panel. If your system contains more than 
one VMX300(-E) workstation, be sure to connect the device to the workstation that the device driver runs on. 

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

Table G provides the pin assignments for the VMX300(-E) COM ports and Figure 25 on page 28 illustrates the RS-422 wall block connections.

Table G.  VMX300(-E) COM Port Pin Assignments

COM 1, COM 2

RS-232, 9600 baud, no parity, 8 data bits, 1 stop bit

COM 3, COM 4

RS-422, 2400 baud, no parity, 8 data bits, 1 stop bit

PIN 2

RX

PIN 3

TX

PIN 5

Ground

PIN 2

Rx+

PIN 3

Tx-

PIN 5

Ground

PIN 7

Tx+

PIN 8

Rx-

VMX300(-E)

EXTERNAL DEVICE

SERIAL DATA