External Interfaces - GE HEALTHCARE CARESCAPE Monitor B650 Technical Manual

CARESCAPE Monitor B650
Speaker
The main speaker is used to provide audible alarms. The speaker cable is connected directly to
the CPU board. The audio signal for the speaker is generated in the CPU board using a tone
generator and an audio amplifier. Audio feedback controls the operation of the speaker.
Buzzer
The buzzer is connected to the user interface board. It functions as a back-up speaker and also
provides an audible power loss alarm.

9.1.5 External Interfaces

Interface boards
There are two versions of the interface board: a Standard Interface Board and an Advanced
Interface Board.
Connector
USB 2.0
DVI-I
10/100 BASE-T Ethernet
interface (RJ-45)
ePort (DB9)
Remote-on connector
The interface boards provide the following main functions:
• They have a high speed USB hub that provides 2 to 4 downstream (Type A) USB ports for
the USB input devices. The on board USB hub interfaces with the USB host controller (root
hub) in the CPU board.
• It passes the analog video signals from the video controller in the CPU board to the DVI-I
connector.
• The 24-bit digital video input from the video controller is converted by an on board DVI
transmitter to 3 TDMS data channels (single link). These provide digital video signals to the
DVI-I connector.
• It provides Ethernet interfaces:
•
•
•
• The Advanced Interface Board passes the remote-on signal, i.e., an on/standby signal
from an external device, to the PMC CPU in the DC/DC board. The operation of the
remote-on connector is disabled when the patient monitor is battery powered.
• The Advanced Interface Board has I2C A/D converter and I2C temperature sensor to
measure the on board VSYS and VSYS ePort (DB9) voltage and board temperature. This
information is communicated to the PMC CPU in the DC/DC board over the I2C -bus.
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2081903-001
Standard Interface Board Advanced Interface Board
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The Standard Interface Board has a single Ethernet transceiver to provide a physical
layer interface for 1 RJ-45 connector.
The Advanced Interface Board has an Ethernet switch that provides physical layer
interface for 4 RJ-45 connectors and for 1 DB9 ePort connector.
Both boards have one link layer interface to the Ethernet controller that is integrated
to the microprocessor in the CPU board.
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