Compex Systems AP4530 manual Linking iDR-8 Units, Slave

Linking iDR-8 Units

Several iDR-8units can be daisy chained together such that audio is passed between them using the 8 channel expander bus. An iDR-inexpander can be added to the first unit in the chain, and an iDR-outexpander can be added to the last unit. This provides a flexible solution for complex installations, for example one where each floor of a building has its own iDR-8with local inputs and outputs but have common audio such as global announcements and alarm messages passing through all. The units can be up to 250 metres apart. Each unit requires its own iDR System Manager session for configuration.

iDR-in

iDR Unit A

SYNC MASTER

ext sync

slave lock 96k

iDR Unit B

SYNC SLAVE

ext sync

slave lock 96k

iDR-out

	ext
	sync
slave	lock	96k		MASTER
	ext
	sync
slave	lock	96k		SLAVE
	ext
	sync
slave	lock	96k		NO SYNC
DR-LINK	AUDIO	IN 16A	15A	14A	13A	12A	11A	10A	9A
OUT IN	OUT
LINK-DR	IN OUT	IN 8A	7A	6A	5A	4A	3A	2A	1A
	OUT 8		7	6	5	4	3	2	1
DR-LINKIN OUT		IN 8B	7B	6B	5B	4B	3B	2B	1B
	OUT 8		7	6	5	4	3	2	1

LINK	OUT 16B	15B	14B	13B	12B	11B	10B	9B
DR-
	IN

Master / Slave When iDR-8units are linked one becomes the master and the others the slaves. This is so that they synchronise their audio communication. The first iDR-8in the chain automatically becomes the master. However, this is not the case in a ‘loop back’ system where the audio from the last unit is linked back into the first unit. Here, you need to force one unit to become the master. This is described later.

Master /slave status is indicated by two LEDs on the iDR-8front panel. To view these the face plate needs to be removed. The slave LED lights when the unit is assigned as a slave. The ext sync lock LED lights when audio is being correctly synchronised between the units. Both LEDs are off if the unit is the master.

Daisy chained units This example shows two units chained together and including the audio expanders. Unit A becomes the sync master, Unit B the slave. The CAT5 cable between them connects 8 channels of audio. These can be selected from any combination of channels using the source patchbays. Any of the Unit A inputs can be routed through the patchbay to Unit B. The DR-Link connection is only required for the expanders. Note that they should connect to the associated iDR-8units. The audio monitor is daisy chained from Unit A to Unit B so that the last unit can be used to listen to any signal in any unit. Note that each unit must have its own session of iDR System Manager running for configuration.

32 IDR-8User Guide