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907-0601-00 Rev. C
5.4
907-SER (8-Channel Serial Data Card)
Card P/N
Config. Dwg.
Diagnostics:
The 8-Channel RS/232/485/422 serial data expansion card (907-SER) is shown in Figure 5-4. This card is
switch configured to multiplex eight data channels onto a single backplane data port (8:1). The 8:1
configuration uses one backplane data channel from the motherboard and supports a maximum baud rate of
250 Kbaud on each of the eight channels. Alternatively, 4:4 and 4:1 options are configurable, at maximum
input channel data rates of 2.5 Mbaud and 400 Kbaud respectively. The 4:4 configuration requires four
backplane data ports from the motherboard.
A 907-DIAG-E diagnostic card may be added to the same stack as the console 907 motherboard to obtain
critical system diagnostics of both the remote and console stacks through an Ethernet interface. Details of the
907- DIAG-E card are provided in the System Modules section 6.0.
Switch SW1 is used to configure the 907-SER card for either remote or console use, although this is only
needed for diagnostics purposes when used with a 907-DIAG-E card. Refer to configuration drawing for
switch settings.
Configure switch SW2 to set the backplane data port used by the 907-SER card. All ports (1~6) are available.
The default setting is data port #1.
The 907-SER card is compatible with 907-232 and 907-485 cards, although the pin outs on the data I/O
connectors are different in RS-232 mode, so any existing RS-232 harnessing must be rewired. The 907-SER
card supports only RS-232 and RS-485 signals when the card part number used is 907-0242-00 or only
RS-422 signals when the card part number used is 907-0242-01. In some cases, two RS-485 channels can
be used as equivalent to one RS-422 channel.
Focal Technologies Corp.
907-0242-00 (RS-232/485), 907-0242-01 (RS-422)
907-2047-00
907-DIAG-E Compatible
Figure 5-4: 907-SER, Serial Data Expansion Card
Model 907 Video/Data Multiplexer – User's Guide
Page 5-5
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