Philips FM-2, Service Manual

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Parallel I/O Communications Interface
18 Chapter 2 - System Interfaces
Parallel I/O Communications Interface
Caution
General-purpose personal computers and modems are not designed to
meet the electrical safety requirements of medical devices. The RS-232 and
parallel connectors on the monitor are electrically isolated to permit safe
connections to non-medical devices, which should be connected with a
cable of sufficient length to prevent the non-medical equipment from
contacting the patient.
If a non-medical device is connected to the serial port, a recorder or
printer connected at the same time to the parallel port should be located
outside the patient vicinity, as the two interfaces are not isolated against
eachother.
The parallel communications port is used to connect the FM-2 to the Recorder
or to a standard PCL Level 3 printer. Supported printers that have been
validated at the time of printing are:
• HP Deskjet 640c
• HP Deskjet 840c
• HP Deskjet 990 CXi
• HP Deskjet 980 CXi
• HP Deskjet 960c
• HP Deskjet 840c
• HP Deskjet 640c
• HP Deskjet 350
• HP Photosmart 1215
A standard PC parallel printer cable is used (IEEE-1284 compliant). This is
supplied with the recorder.
Although the same cable is used to connect the monitor to the Recorder or a
PCL Level 3 printer, a different protocol is used for communicating between the
monitor and the Recorder. This protocol does not conform to the IEEE 1284
norm, and is actually a serial connection.