36
Technical Specifications
9.1
Data Handling Performance
The
FC-21ETH
,
FC-22ETH
and
FC-24ETH
are designed to support mainly AV-
relevant RS-232 communication.
These devices have overall data bandwidth limits which should be high enough in
most AV installations to support the required communication bandwidth.
In extremely demanding cases, we recommend that you take into account the
bandwidth limitations.
The total sustained data bandwidth that each device can handle for all ports
simultaneously is as follows:
FC-21ETH
—150kbps
FC-22ETH
—140kbps
FC-24ETH
—180kbps
9.2
Example Bandwidth Calculation
The
FC-22ETH
has two serial ports. Each serial port can support up to:
140kbps / 2 = 70kbps
If each of your protocol commands is 100 bytes, (that is, 800bits), you can safely
send and/or receive a minimum of 85 of these commands per second on each
serial port ((140kbps * 1024) / 800bits / 2 = 89.2). The same calculation applies to
all devices. A similar calculation applies when fewer ports are used at the same
time; in this case higher bandwidth per port can be achieved.
In critical applications requiring a lossless data transfer, we recommend that
communication on all the other ports is stopped when making a long file transfer (for
example, when performing a firmware upgrade via one of the serial ports).
Summary of Contents for FC-21ETH
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