Myalarm V-LCD1 Manual de Instruções descarregar pdf (Página 54)

INSTALLATION

5-48

System 2 Installation / Programming Manual

Video Display Terminal (VDT) (p/n #4100)

Unpack and inspect the terminal shipping box. Included are a terminal, a keyboard with coiled cable, a power

cord, and a VDT Users Guide. The VDT is UL listed, requires 120VAC, 50/60 hz at 0.7A and requires a

three prong grounding outlet. It is supplied with a five foot power cord.

Serial data is sent to and received from the terminal via a RS232 data link which requires a five conductor

shielded cable. It may be located up to 100 ft. from the System 2. Connections to the System 2 are made

using the on-board 9-pin male connector (P1). The baud rate is factory set at 9600. The number of data bits is

8, there is one stop bit and no parity. This terminal emulates the VT-100 (ANSI) standard.

In order to prevent "screen burn-in", we recommend that you set the VDT's screen-saver option to ON. This

will cause the screen to shut off after several minutes of inactivity. The screen will be reactivated when a key

is struck or a new message is sent.

VDT Ground

The foil shield of the cable to the VDT must be earth grounded. Attach the shield only to Terminal #1 of the

System 2 which must be earth grounded. DO NOT CONNECT THE FOIL SHIELD TO PIN #1 OF THE

25 PIN "D" CONNECTOR.

VDT Connections

The optional VDT requires a five conductor, 22 or 24 gauge stranded wire, with an overall shield. Maximum

cable length from the System 2 to the VDT is 100 ft. You will need a female 9 pin connector and a 25 pin "D"

male computer connector. Use a good soldering iron, small tip, suitable for electronic components. Do not

connect the shield to the 25 pin "D" connector. (See Figure 10).

Using a five conductor, shielded wire, make the following connections:

9 Pin Connector (P1 - System 2) 25 Pin Male DB25 Connector (VDT):

Pin #2 Pin #2

Pin #3 Pin #3

Pin #5 Pin #7

Pin #7 Pin #5

Pin #8 Pin #4

Plug the 25 pin "D" connector into the MODEM input on the rear of the terminal. It is the connector on the

left side as you look at the back of the terminal.

There is a CTS LED which remains illuminated on the lower right hand side of the circuit board. If you are

connected to a PC or VDT correctly, the CTS LED will “go out”. If it doesn’t, your wiring is either incorrect

or you are programmed for the wrong COM port on your PC.

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Myalarm V-LCD1 Manual de Instruções Página 54