When using an isolator, it is necessary to use a control module. The isolator cannot simply be mounted on a standard loudspeaker line. The isolator must be powered, the audio signal must be implemented on the loudspeaker line, and fault detection must be carried out. This functionality is provided by the loop monitor IS8200-100.
Our isolators can only operate in conjunction with the IS8200-100 loop monitors or the LM8200-4, which is exclusively manufactured for third parties.
The loop monitor was developed simultaneously in 2009 with the IS8200-1 isolator. Since then, the loop monitor has been certified multiple times as part of the certification of our voice alarm evacuation system. In addition, several other control panel manufacturers have already implemented and certified our loop monitor. It is now expected that we will soon be able to deliver an independent certificate based on EN54-17.
The IS8200-100 loop monitor consists of a main PCB with four detection PCBs for four loudspeaker lines. The system is supplied as standard in a wall-mounted housing, but integration into an existing voice alarm evacuation system is also an option. The loop monitor is only available as a DIN rail variant and can easily be incorporated into custom systems.
The loop monitor connects to the audio output of voice alarm evacuation systems. Regardless of the brand, if the system provides a 100 Volt (or even 70V or 50V) audio signal, it is possible to expand the installation with ring loop loudspeaker field cabling.
The loop monitor does not require a separate triggering signal. When the voice alarm evacuation system outputs a 100V audio signal, the loudspeakers will be activated. Special attention must be paid to ensure that the voice alarm evacuation system does not continuously transmit monitoring signals in the form of audio on the line, as this would keep the system permanently active. While this is not a problem, it is unnecessary. Pilot tones are often used for line monitoring purposes, but the loudspeaker line is already monitored by the loop monitor.
The loop monitor requires a 24V power supply. To remain within CE specifications, this must be an EN54-4/A2 compliant power supply. Almost any voice alarm evacuation system can provide this. If desired, we can supply a suitable power supply unit.
If a short circuit or line interruption occurs, this will be reported via the fault contact. Therefore, there is always a fault indication for each loudspeaker cable. The fault contacts from the different lines can be processed by the voice alarm system.
The IS8200-100 loop monitor can only operate with a 100 Volt amplifier equipped with an output transformer. If only a digital amplifier is used, the system will generally not function correctly. For such applications, we can provide an auxiliary coil.
Important: By using our IS8200-100 loop monitor, you always offer a certified solution. We are the first supplier worldwide capable of operating on any 100 Volt voice alarm evacuation system. Thanks to the certification, you as a supplier are fully covered for liability towards the end user.
