Section 2 - Installation and Operation
VM700A Option 01 (NTSC) & Option 11 (PAL) User Manual
2-7
Fan Exhaust
RS–232 Ports
Figure 2-3: VM700A rear panel
RS-232C Connections. The two RS-232C DTE ports of the VM700A are used to
output graphics and reports to a printer, as well as for remote operation via a
modem or direct serial connection. Both connectors are located on the A5 CPU
board and are accessible on the rear panel. Both are 25-pin male “D” connectors.
The Communications Setup file is found in the Configure Files directory (press
Configure and then touch the Configure Files soft key), and contains parameter
settings for both ports. Configuring the Communication Setup file is covered in
Section 3, Configuring the VM700A.
The following list describes the signals the VM700A outputs and the input
signals required on all the active pins of the serial ports:
Pin 1 - Chassis Ground.
Pin 2 - TX (Transmit Data). The VM700A transmits data on this pin.
Pin 3 - RX (Receive Data). The VM700A receives data on this pin.
Pin 4 - RTS (Request To Send [data to the VM700A]).
With Flow Control (CTS/RTS selected), normally RTS connects to the
CTS line of a terminal, and the line is active when the VM700A is ready
to receive data. When the receive buffers of the VM700A are nearing
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