Network components
OmniTrax Product Guide Page 221
The NIU operates on 12 to 48 VDC. The enclosure occupies 1 RU in an EIA-19 in. equipment
rack. Desk-top mounting is also possible. The front panel includes a removable terminal block for a
Form C relay output, which is used to report equipment/communication failure. There are LEDs for
power, and communications (all modes) and a USB port is provided for the connection of the UCM
(to configure the device). The rear panel includes a two-pin power input (removable terminal block)
and a ground screw terminal (the NIU requires a low resistance earth ground connection). There
are two mirrored communication channels (Side A and Side B). Each communication channel
includes the following:
• for the NM - Ethernet (RJ45), EIA-232 (DB9-F), USB
• for the Silver Network - EIA-422 removable terminal block, ST connectors for fiber optic cable
There is also a DB37-F connector on the rear panel (reserved for future use).
Network Interface Card
Each processor communicating on the Silver Network requires a Network Interface Card (NIC),
which piggybacks onto the processor card via a 40-pin header. The NIC manages all network
communications for the processor and includes a regenerative repeater, which reshapes and
retimes the network data. There are five variants of the NIC available. Each performs the same
functions for the processor, but is specific to the transmission media.
The network interface card supports the following network media:
• 00BA0301 - Multi-mode fiber optic cable
• 00BA0302 - EIA-422 copper wire
• 00BA0303 - Single-mode fiber optic cable
• 00BA0304 - Mixed media, EIA-422 and multi-mode fiber
• 00BA0305 - Mixed media, EIA-422 and single-mode fiber
Note You can use only one of the communication options between the NIU and
the NM for both channels (Ethernet OR EIA-232 OR USB) - no
combinations.
You can use either one of the communication options for each channel
between the NIU and the Silver Network devices (e.g., EIA-422 on Side A
and fiber optic on Side B) - combinations can be used.
The NIU cannot communicate with OmniTrax processors via the sensor
cables. An EIA-422, or fiber optic link must be established between the
NIU and one or more processors.
Note OmniTrax processors, which communicate over the sensor cables
require an NIC.
Do not use a mixed media NIC to connect an NIU to an OmniTrax
processor, which will communicate with other processors over the sensor
cables. In this case, use an 01, 02 or 03 variant (single media NIC).
Note The second generation single-mode fiber optic NICs (00BA0303-002,
00BA0305-002) are not compatible with first generation single-mode
NICs (00BA0303-001, 00BA0305-001) or the first generation single-
mode NIU (00EM0200-001).
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