Harman JBL Professional Ivx HP-DS170 Installation Manual page 15

JBL Intellivox HP series Installation Manual Rev 2.1
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• Impedance sensing mode: When wired for impedance-
sensing use, the impedance between 'Common' and pin 2
is 10 kOhm. When a fault condition occurs, the impedance
between 'Common' and pin 2 rises to 20 kOhm.
The relay contacts have maximum current and voltage
ratings of 100 mA and 24 V respectively.
202007/IvxHPIM_v2.1
Fault Monitoring when using the 70 V/100 V input.
If the Intellivox's 100 V input is in use, a simple failure
monitoring scheme requiring no additional connections
can be easily implemented. This is based on impedance
switching.
The amplifier driving this input should be capable of
detecting changes in its load impedance.
The impedance between pins 1 and 2 of the 100 V input
connector can be two values:
• High impedance (> 500 kOhm @ DC).
• Low impedance (approximately 2.2 kOhm @ DC).
The Intellivox can be configured to switch to the low
impedance state in case of a failure by means of the
WinControl software.
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