Aspect BIS VISTA Spezifikationen PDF herunterladen (Seite 28)

SECTION 3 PRINCIPLES OF OPERATION

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3-6

The Main board controls all input and outputs, power, data memory, and clock functions.

The Card Engine controls the screen display.

The Connector board connects the reset button, USB and serial ports to the main board.

There are two USB ports. The USB Type A port is used to export data to a removable drive.

It is also used to upgrade monitor and BISx software. The RS-232 serial port can be used to

transfer data from the monitor.

3.2.2.1 The BISx Interface

The BISx interface is composed of two unidirectional bi-phase encoded serial lines, one

going to the BISx and another bringing data from the BISx.

The power to the interface is under software control. An overcurrent detector circuit

monitors current to the BISx. If the current exceeds the expected value, the power is shut

off to the BISx by the hardware and the user is notified.

3.2.2.2 The Interconnect Board

The Interconnect board provides the physical mounting and electrical connections for the

serial and USB ports. Its mechanical construction includes ESD protection.

3.2.2.3 The Power Supply

The power supply operates on AC power from 100-240 VAC, 50-60 Hz, with output of 12

VDC, 24 watt maximum. It charges the battery; 7.2 V (nominal), 2150 mA hr. Signals are

provided to the processor to indicate AC FAIL, RESET, and LOW BATTERY. The power

supply contains internal fuses.

Caution:

To turn off all A/C power, disconnect power cord from A/C outlet.

Battery can be removed to shut down unit completely.

3.2.2.4 The Battery

The battery is for backup use only. The battery includes temperature and current control

elements, and has a nominal output of 7.2 volts DC. The battery charges whenever the BIS

VISTA monitor is plugged into A/C power. It is capable of supporting monitor operation

for approximately 45 minutes.

Note:

The BIS VISTA monitor may not power up entirely if battery power is

low. If that should occur, connect unit to wall power and press the

Reset button. (Refer to Section 8.10 “Using the Reset Button”).

3.3 System Features

3.3.1 System Self Checks

The BIS VISTA monitor has several self-checking features to ensure that the system is

operating properly. These include:

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Aspect BIS VISTA Spezifikationen Seite 28