ARU104MK2

Relay group 4 relays

4 Relays with NO & NC contacts
DIN rail mounting enclosure
RS-485 communication bus
Manual relay activation contacts
Terminal block input & output connections
ARU104MK2 - Relay group 4 relays

The ARU104MK2 is a special designed flexible relay module, consisting of 4 relays. These can be used for switching between two different input signals. In the most common situations, a background music signal and a priority signal are applied. In combination with the APM paging consoles, it offers a simple and versatile paging solution that can be applied to all types of systems. It has full priority and can be switched between 100V and standard low impedance speaker signals as well as line level signals. There’s the possibility to connect multiple units in cascade which offers a wide range of possibilities for all kinds of applications. They are suitable to be mounted on a standard DIN rail, providing connection strips for the in- and output signals.

System Specifications
Number of relays 4
Relay Type Two pole type
Inputs Signal 8 x 3-pin screw terminal for A & B input
Outputs Signal 8 x 2-pin screw terminal
Contacts Normal open & normal closed
Control Digital communication bus (RS-485)
Manual (contact) relay activation
Indicators Relay activation indicator LED’s
Power Consumption 6 W (max.)
Supply 24 V DC
Connectors 2 x RJ45 (input & linkthrough outputs)
Max. cable length 300 m
Connection standard TIA/EIA T568B
Product features
Dimensions 112.8 x 50.4 x 132 mm (W x H x D)
Weight 0.580 kg
Data protocol RS-485
Required cabling UTP CAT5E
Colours Green
Construction Unbreakable plastic housing

APM & ARU Setup Examples

Together the APM paging tables and the ARU Relays create a flexible setup that can easily be installed to match your every need.

 

Example 1:

This application diagram shows a simple and basic setup with an APM Paging Microphone in an analogue paging setup, combined with an ARU Intelligent Relay Unit. Besides the APM Paging Microphone, a Line-Level audio source is connected as background music source. On the output of the ARU Unit, a four channel 100V amplifier (or four independent amplifiers) is connected for amplification of the audio signal for every zone.

In normal operation, the music coming from the Line-Level audio source (CD-Player, Tuner, MP3 Player, … ) will be heard in all the zones. (The relays of the ARU will be switched to background music) In case of an announcement, the ARU will switch to the signal coming from the paging microphone (for the channels selected by the buttons on the APM microphone) and the announcement will be heard in the selected zone.

In this way, every zone has a separate amplifier (or channel) whereby the power or volume for each zone can be different. (e.g. Some zones are bigger than others, so need more amplifier power)

Advantage:

  • Volume can be set for each individual zone
  • Amplifier power can be different for each individual zone

Disadvantages:

  • Every zone needs separate amplifier

 


Example 2, 100V application:

This application diagram shows a simple and basic setup with an APM Paging Microphone in an analogue paging setup, combined with an ARU Intelligent Relay Unit. Besides the APM Paging Microphone, a Line-Level audio source is connected as background music source. The audio signal coming from the sources (APM Paging Microphone and Line-Level audio source) is amplified before it’s fed to the ARU unit. This way, only two amplifiers (One for paging and one for background music) are necessary, no matter how many output zones are used. As long as the amplifier power is sufficient for driving the loudspeakers.

In normal operation, the output of the background music amplifier will be fed to the ARU and will be heard in all output zones. (The relays of the ARU will be switched to background music) In case of an announcement, the ARU will switch to the signal coming from the Paging amplifier (for the channels selected by the buttons on the APM microphone) and the announcement will be heard in the selected zone.

In this way, only two amplifiers are required, no matter how many output zones are used.

Advantage:

  • Only two amplifiers are required, no matter how many zones used
  • Volume for background music and paging can be set separately

Disadvantage:

  • Amplifiers should have sufficient power for driving all zones

Example 3, Multiple Paging microphones:

This application diagram shows a more advanced analogue setup with multiple APM Paging Microphones linked with each other in bus structure, combined with two ARU Intelligent Relay Units.

Multiple APM Paging Microphones are connected, using different numbers of control buttons. This way, some paging consoles can be configured in such way that they only can control only some (and not ALL) zones, or they can be configured in such way that multiple zones are ‘grouped’ under one button, meaning by pressing one single button messages are announced in multiple zones at the same time.

The APM Paging consoles are connected in a bus structure, wherein only one Paging Microphone can be used simultaneously. The paging is priority based and can be configured by addressing. The first ARU Unit is used for switching between the line level signal coming from the background music source and the paging microphone. 

In normal operation, the music coming from the Line-Level audio source (CD-Player, Tuner, MP3 Player, … ) will be heard in all the zones. (The relays of the ARU will be switched to background music) In case of an announcement, the ARU will switch to the signal coming from the paging microphone (for the channels selected by the buttons on the APM microphone) and the announcement will be heard in the selected zones.

The second ARU Unit will switch simultaneously with the first ARU Unit, and in this application it’s used for overriding volume control.

As shown in the diagram, every zone is equipped with one or more additional 100 Volt volume controllers which can be used for reducing the volume in that particular zone, or for that particular loudspeaker. In case of an announcement, and external 24 Volt power supply (switched by the 2nd ARU unit) will trigger the priority relay on the 100 Volt volume controller, making sure the announcement is always heard on maximum volume.

 


Example 4 Industrial Application:

 

 

This application diagram shows an advanced setup where multiple APM Paging microphones and an ARU unit are used in a digital application.

The APM Paging microphones are connected directly to the Digital Matrix systems and the paging is configured using the software of the Matrix systems. The ARU Intelligent Relay Unit in this application is used for controlling external devices such as Lightning, Automatic projection screens and Automatic curtains. This provides the possibility for controlling an extreme variation of external devices, Almost everything controllable by contacts closure.

The ARU relays can be controlled simultaneously with voice announcements or by separately programmed buttons while both Relay-Toggle and Push-To-Hold is possible.


Example 5, Media Room controlled by AMX/ Crestron equipment:

 

The following example shows how Crestron/ AMX controls can be combined with an ARU unit to control a media room. The ARU operates the blinds, lowers the projection screen, controls the lights or, when using an additional relay, operates virtually any 220V appliance.

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