Kongsberg Simrad MF90, Installation Manual

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476671/B
The maximum length of the Ethernet cable is 100 meters.
Serial line connectors
Maximum length for an RS-232 serial cable is typically 60 meters with 2400 bps data
rate, however this depends on the cable quality. Always check the cable manufacturers
specifications for the actual "shunt capacitance". A common figure is 47.5 pF/m, which
gives a maximum cable length of about 50 meters.
Even though a standard exist for RS-232 pin configuration, certain manufacturer may still
choose their own connector pins for the various signals used. In order to make the RS-232
connection to your peripheral device work properly, you must always consult the relevant
instructions provided by the device manufacturer.
Note
Observe that long runs of unshielded cable will pick up noise easily. This is because
the RS-232 signals are not balanced.
COM1/COM2/COM3/COM4
This serial port is set up for RS422 communication. In order to set up the serial ports
to match your interface requirements, use the dedicated software utility in the device
driver. If you need to change these settings, contact your local dealer or distributor for
advice. You can also contact our support department.
COM5
This serial port is set up for RS232 communication. This serial communication format
is fixed and cannot be changed. This serial port may not be fitted on all computer
models.
Use USB-to-serial converters if additional serial lines are required. Several types are
commercially available. Note that most USB-to-serial converters will introduce some
latency. They may also introduce jitter in the communication. The amount of jitter depends
on the quality of the converter.
USB connectors
The Processor Unit offers several USB interface sockets. The USB sockets can be used
to interface peripheral devices such as USB flash drives, portable hard disks, mouse and
keyboard. USB is normally not used to interface peripheral devices, but this may be possible
if you use USB to Serial converters. Note that most USB-to-serial converters will introduce
some latency. They may also introduce jitter in the communication. The amount of jitter
depends on the quality of the converter.
Dedicated USB ports are provided for the "Wake-up on USB" functionality. "Wake-up on
USB" means that you can turn on the MF90 system by activating any USB device connected
Simrad MF90 Installation Manual