Harman AXYS TUNNEL IndustryAmp Dante PB-400-DN, Инструкция по установке и эксплуатации, Страница: 14 / 20

AXYS
®
IndustryAmp-DN User Manual Rev 3.0
201911/IAMPDN_3.0 14
Failure relay
The IndustryAmp includes a single-pole changeover relay
whose contacts are accessible on a 3-pole 3.81 mm-pitch
screw terminal connector. The conditions under which
the relay operates are defined as part of the amplifier
configuration in WinControl.
The relay connections may be configured either as volt-
free, or with additional internal resistors to allow them
to be connected directly to impedance-sensing line
monitoring equipment such as the AXYS
®
Cerberus. This
selection is made by moving an internal PCB jumper. See
“fig.5: Failure relay”.
In volt-free operation, CO is connected to NC; a failure
condition causes CO to be connected to NO.
When configured for impedance-sensing use, the
impedance between CO and NC is 10k
Ω
and open-circuit
between CO and NO in normal operation. When a fault
condition occurs, the impedance between CO and NC rises
to 20k
Ω
, and CO is short-circuited to NO.
An AXYS ® Cerberus or other impedance-sensing fault
monitoring equipment may be connected to CO and NC.
The contact wiring arrangement is shown in “fig.5: Failure relay”.
The relay contacts have maximum current and voltage
ratings of 100 mA and 24 V respectively.
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





fig.5: Failure relay
Configuration Jumper Notes
Volt-free Towards bottom Factory default
Impedance-sensing Towards top -