1 Power Inlet
The OHM CRED series unit should be connected to a suitable mains electricity supply using the cable
supplied. The processor has a switch mode power supply that is capable of operating with a nominal
mains voltage of 85V to 240V, 50/60Hz without re-configuration.
2 Network Expansion Port
This allows for a network card to be fitted.
3 Audio Input Connectors
All audio connections are fully balanced and wired pin-1 ground, pin-2 hot & pin-3 cold. The two
inputs have pin-1 connected directly to the chassis and feed the signal processing chains. If an
unbalanced source is used, a connection should be made between the pin-3 'cold' signal and the
4 Audio Output Connectors
The processed outputs are impedance balanced, and wired pin-1 ground, pin-2 hot and pin-3 cold. An
unbalanced input may be driven by connecting pin-3 'cold' signal to the ground connection of the
unbalanced destination input. Note that output pin-1's are ground lifted at audio frequencies but
connected to ground at RF for good EMC performance. The intention being that the amplifiers the
processor is driving should be responsible for the grounding of their input cable shields.
5 Communications Port Connector
A CRED processor may be controlled entirely from another controller, typically a Personal Computer,
running an application that is compliant with the ObCom standard. Connection will normally be made
to the controller via this serial port connector. This port is also used for updating the firmware in the
unit.
Note that the communications port is NOT disabled when the front panel is made secure using the
secure button.
8
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5
3
4
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4 44444
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444
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PUSH PUSH
PUSH PUSH
2
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Rear Panel
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