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7. CONNECTOR PINOUTS
The standard connector on OmniBus II products is a 60-pin Molex® LFH™ re-
ceptacle. Each OmniBus module (core) has an LFH connector dedicated to it.
Signals on the LFH connector are either general-purpose or module-specific.
General-purpose signals (including triggers, syncs, discretes, and timing) are
common to most modules and protocols. The databus signals are module-specific
in that their use and meaning depend on the protocol and functionality of the as-
sociated OmniBus II module. This chapter provides the information needed to
connect to the individual modules through the LFH connector. Should your Om-
niBus II product have a different connector or a module not listed here, please
consult other documentation provided with the product or call Customer Support
at Ballard Technology (see Section 1.5).
Ballard offers a number of special cable assemblies to facilitate the use of their
OmniBus product line.
7.1 Interface Connector
The user interface connector on OmniBus II products is a Molex 60-pin LFH re-
ceptacle (Molex PN 70928-2000). The recommended mating connector is a cable
plug assembly consisting of a frame subassembly (Molex PN 70929-2000) and
four terminal strips (Molex PN 51-24-2022). For more information, consult
www.molex.com. Appropriate shields, strain-reliefs, and backshells are also re-
quired. The LFH is a high-density connector about the size of a 15-pin D-sub-
miniature connector. For proper clearance from adjacent connectors, the overall
length of each LFH connector (including any backshell molding) must not ex-
ceed 1.64 inches.
7.2 General Pinout
All OmniBus II products have the basic pin designations shown in
Table 7.1
. Note
that wiring is done in pairs; 30 pairs total. Especially on databus signals (labeled
“
BUSxx ” in
Table 7.1
), be sure to use twisted pairs to avoid cross talk. The suffix
on the designations for databus signals in
Table 7.1
represents the polarity (P for
positive and N for negative). The use and meaning of databus signals depends on
the protocol and functionality of the associated OmniBus II module, as indicated
in Section 7.3.
OmniBus II PCIe/PXIe User’s Manual 7-1