Roland S-4000S User manual

S-4000S MASTER / SLAVE / SPLIT QUICKSTART
The S-4000 Modular Digital Snake delivers 24-bit, 96kHz audio over Cat5e cable using Roland’s
REAC protocol. This document outlines how to set the REAC Modes for all of the S-4000 units
used to configure an S-4000 digital snake.
There are currently two products, the S-4000S and the S-4000H, used to configure an S-4000
digital snake. Typically the S-4000S is on stage and provides connections for all source inputs as
well as returns for speakers and monitors. S-4000H units are used at the FOH position and at all
split locations.
Each S-4000S product has a small “dip switch” that is used to select the REAC MODE
for that device.
THE MASTER
Every 40-channel S-4000 system has one and only one device that is configured as the system
MASTER.
The inputs to this device are sent to every other device in the system.
Typically the MASTER device is the S-4000S unit that is on stage.

THE SLAVE
Every 40-channel S-4000 system has one and only one SLAVE device.
The Cat5e cable for the SLAVE device comes directly from the MASTER unit or from a gigabit
switch connected to the MASTER unit.
The outputs of this device come from the MASTER unit.
The inputs to this device are sent back to the MASTER unit and only to the MASTER unit.
Typically the SLAVE unit is an S-4000H positioned at the main console or
Front of House mixing position.
The outputs of this S-4000H come from the sources connected to the inputs of the S-4000S on
stage and are connected to the inputs of the FOH console.
The inputs of the SLAVE unit come from the console’s bus outputs and are sent back to the
MASTER unit on stage to be output to monitors and/or the main speakers for the event.
THE SPLITS
An S-4000 system can have an almost unlimited number of SPLITS.
The Cat5e cable for the SPLIT devices comes from a gigabit switch connected to the
MASTER unit.
The outputs of this device come from the MASTER unit.
The inputs to this device are not used by the S-4000 system.
Typically the SPLIT unit is an S-4000H positioned at the monitor mixing location, recording
location or broadcast truck.
The outputs of this S-4000H come from the sources connected to the inputs of the S-4000S on
stage and are connected to the inputs of the console or recording system.

REAC QUICKSTART SUMMARY
Standard stage and main console system
S-4000S-3208 on stage configured as MASTER
S-4000H at main Front of House console position configured as SLAVE
Cat5e cable connected from MASTER to the SLAVE
Audio from stage goes to FOH position.
Returns from FOH position go back to the stage.
Stage and main console system with monitor split
S-4000S-3208 on stage configured as MASTER
S-4000H at main Front of House console position configured as SLAVE
S-4000H at monitor console position configured as SPLIT
Cat5e cable connected from MASTER to an S-4000-SP or standard gigabit switch
Cable from S-4000-SP goes to both S-4000Hs in the system
Audio from stage goes to FOH position and Monitor position
Returns from FOH position go back to the stage.
IMPORTANT NOTE
Any time the REAC mode switches are changed, the unit must be powered off and then on for the mode change
to take effect!!

MULTI-UNIT S-4000 SYSTEMS
Each S-4000 system’s Cat5e cable can transport up to 40 channels of high quality
24-bit 96kHz audio
The typical configuration for a basic system is 32x8 and consists of an S-4000S-3208 and an S-
4000H connected using one Cat5e cable, or (two when using redundant cables.)
For a 64x16 system, two separate 32x8 systems are specified using two independent Cat5e cables.
The typical configuration for this system is two S-4000S-3208 and two S-4000H units.
Each S-4000S is connected directly to an S-4000H via Cat5e cable.
Each of these systems is independent and therefore each system will have one MASTER unit and
one SLAVE unit as described above.
Be sure to power the S-4000 unit off and then on any time the REAC mode is changed.