EMC12 ETC2 [List of Unclassifed Manufacturers], EMC12 Datasheet - Page 42

• Manufacturer Part Number: EMC12
• Description: Audio Interface for the EmPack System
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

EMC12 Hardware Reference Manual
1.5.4 EmPack Audio Signals
The input and output audio channels as routed through the EmPack system are differential, i.e. a pair of
wires (+ and -) carry each signal. The numbering of the twelve channels start with 0 and ends with 11.
Therefore, the input side of the first channel consists of the signals IN00+ and IN00-. Likewise, the
outputs are labeled OUT00+ and OUT00-. In addition to the 48 signal wires, there are 20 pins that are
either grounded or no-connections making a total of 68-pins. Two standard 68-pin SCSI connectors (one
from AMP and the other from Thomas&Betts) and standard 68-pin SCSI cable are used for interconnect
of the audio components of the EmPack system.
Figures 3-4 and 3-5 can be used to distinguish between the AMP and T&B styles of connectors and to
locate pin 1 for each type. Note that these figures represent the connectors soldered onto the circuit
board and not the cable connector.
Typically, Thomas&Betts (T&B) connectors are used between the EmPack codec cards mounted inside
the card cage and the rear-panel circuit board. Flat ribbon cable is used for the interconnection.
Figure 1-6: Thomas & Betts connector
09 Jan 2006
Communication Automation Corporation
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