Installation guide

VAR4 / VAR12 / VAR20 - Product Description
3.9.2 Digital Inputs
Each of the digital inputs may be independently assigned as a Routing Control, Routing Reset or Remote
Fault input. Operation is as described in Sections “3.7.3.1 Routing” and “3.7.3.2 External Faults”.
L
If a Latched Route control is set up on an input on a Remote I/O Unit, then the matching Reset
Line must be on the same Remote I/O Unit.
3.9.3 Digital Outputs
The digital output is an active-low open-collector output.
The digital outputs may be assigned as ‘Busy Outputs’. Each such output may be assigned to correspond to
the busy state of any VAR Router output or group of outputs when being driven by any input or group of
inputs. In the case of a group of VAR Router outputs, it operates as an OR function of the busy state of the
VAR Router outputs, i.e. if any of them are busy with any of the selected inputs then the digital output is
driven.
Once an output has been assigned to the ‘Busy’ function, its open and short circuit fault monitoring is
enabled. The VAR Router will log a fault in the event of the output load becoming disconnected, or a short
circuit condition being detected at the output. The VAR Router fault report identifies the specific Remote I/O
Unit, and the particular digital output channel number affected. It does not differentiate between open and
short circuit faults.
3.10 Night Time Volume Control
The VAR Router provides a Night Time Volume Control function. This is a facility for automatically limiting
the volume of announcements at configurable times of the day, usually during the night.
The Night Time Volume Control is very flexible, with functions as follows:
• Start and end times individually programmable for each day of the week on a seven day cycle.
• Volume limits individually configurable for each output.
• Application or omission of volume limits individually configurable for each input.
3.11 Test Tone Generation
The VAR Router can synthesise different test tones to assist the commissioning process of the PA/VA
system eliminating the need of external tone generators.
These test tones are selectable via the VAR Router control software, and are available as a special input
called Test Tone.
The Test Tone input can be routed by activation of a contact, or a button configured for DVA Routing. See
Sections “3.7.3.1 Routing” and “3.2.1.1 Paging Microphone Mode”, and “3.2.1.2 Zoneable Fire Microphone
Mode” for further information on routing mechanisms.
Alternatively the Test Tone can be permanently allocated to specific outputs using a permanent route, see
section “3.8 Permanent Routes”.
With appropriate priority set-up the Test Tone can be indefinitely routed without compromising microphone
and DVA broadcasts. This enables the Test Tone to be provided for the required period of time. This is
useful especially when commissioning and testing PA/VA systems installed in large sites.
Issue: 03 complete, approved
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