Amplifier-To-Amplifier Failover - Biamp Vocia VA-8600 Manual

Amplifier-to-Amplifier Failover

Vocia supports one-to-one automatic amplifier failover in case of fault. Failover is triggered by one of the following conditions:
• Chassis fault
• Channel fault
• Loss of power
• Loss of CobraNet link
• Loss of Logic I/O
Only faults (e.g., heat sink fault and channel failure fault) trigger the failover mechanism. Warnings indicate abnormal system conditions that
do not immediately impair audio and do not trigger the failover mechanism.
The redundant amplifier must have the same configuration as the primary amplifier (i.e., amplifier module count, watts per module, load
configuration). A wire failover link cable must be connected between the primary and the redundant amplifier as shown below. Connect ground
to ground and logic 4 of the primary amplifier to logic 3 of the redundant amplifier; connect logic 3 of the primary amplifier to logic 4 of the
redundant amplifier. Leave logic 1 and 2 disconnected. The redundant amplifier can be wired in parallel to the existing speaker line or it can
be connected to a redundant speaker line (see figure below). Relays isolate the output terminals on the secondary VA-8600 or VA-8600c
unit. Relays are normally open. When a configuration is received, relays close on the primary VA-8600 or VA-8600c and remain open on
the redundant VA-8600 or VA-8600c. On failover, the relay position is switched.
Primary VA-8600
After replacing the faulty amplifier, a power cycle is required to recover from failover. The primary device will resume control after the fail
condition is cleared and the unit is re-powered.
Parallel
VA-8600/VA-8600c REAR PANEL
8
Redundant VA-8600
Redundant