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3 Specifications of the Devices
Direct Switching
The eight logic inputs may be used to directly recall a configuration. It is irrelevant how long the control
voltage is applied to the input.
3.14.9.2 Error Matrix
In the case that the SXL II is not integrated into a network, it is still possible to provide an error indication.
The error matrix offers 8 fault indication contacts. Every relay may be allocated to a certain type of defect.
Type of Defect Description
AC Status Mains fuse or mains supply failure
Protect Amplifier channel in protect mode
Line Monitor* Impedance measurement could not be accomplished
Load Short* Impedance below lower limit
Load Open* Impedance above upper limit
Overheat* Critical temperature
Offline Amplifier does not answer via data bus
* This function is available for certain devices only
The allocation of the relays applies to all connected amplifiers. In case of a defect, the 8 LEDs on the front
of the SXL II (section 3.14.5) will indicate which amplifier is affected.
Although, the 8 relays may be programmed to indicate different types of defects (refer to section 3.14.8.5),
a general default indication is usually required instead. This may be created by allocating all types of defect
to one relay only.
It is also possible to combine the error matrices of several SXL II. To achieve this, every SXL II is set to the
same relay allocation. The relays of each SXL II are then either wired in series (released contacts).
Caution
“Released relay contacts in case of defect” are the regular case in installations. The SXL II works
accordingly: In case of error-free operation of the connected amplifiers, the relays are active. In
case of an error (including a failure of the mains supply of the SXL II) all relays release.
3.14.9.3 Line Monitoring
The SXL II may be used as a low impedance line monitoring device together with appropriately equipped
Bittner Audio amplifiers. If required, the measurements may be accomplished in intervals less than 100
seconds to provide full compliance with EN–60849.
The following functions and parameters are involved in the line monitoring (also refer to section 3.14.8.4):
• Signal Generator
• Parameter LoadSigChk per amplifier channel
• Parameter Short Threshold and Open Threshold for impedance window
c
2016 Bittner Audio Int. GmbH
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