907-0601-00 Rev. C Model 907 Video/Data Multiplexer – User’s Guide
Focal Technologies Corp. Page 4-2
4.1 907-MC (10/100 Mbps Ethernet)
Note: This card is not recommended for new designs. Refer to 907-GBE or 907-GBES cards.
The 907-MC Ethernet media converter card supports single channel 10Base-T and 100Base-Tx, both full and
half-duplex links, with link-speed auto-detection. An example of one configuration is illustrated in Figure 4-2.
The fiber link is limited to a length of 2 km when half-duplex mode is used, as per IEEE 802.3 standards. If the
907-MC card is configured to use full-duplex mode, the fiber link length is limited only by the optical budget.
The external fiber optic bushing is typically ST/PC, but FC/PC versions are available.
The 907-MC 10/100 Ethernet media converter is powered from +5 VDC (±5%) with a maximum current draw
of 0.7 A via Molex connector labeled J2. The board is fitted with circuitry to support an optional DC-DC
converter for input voltages ranging from 10 to 28 VDC. When stacked on a motherboard, the card is typically
powered via the PC/104 backplane. The card has a 1 A time delay, soldered fuse for each of the connector-
powered and backplane-powered configurations.
The 907-MC Ethernet media converter is outfitted with diagnostic status LEDs that indicate both the copper
(Ethernet) and optical speeds. Power and Ethernet Rx/Tx indicator LEDs are also provided. Multiple
configurations and PCB assemblies are available for this card. For more details on the different configurations
of the 907-MC media converter card, refer to the configuration drawings 907-2007-00, 907-2007-01, and 907-
2007-02.
Figure 4-2: 907-MC (10/100 Ethernet) Card without WDM
The 907-MC is available in pressure tolerant versions with a 3000 psi rating.
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