11
Failover Modes
The Vocia amplifiers support a device-to-device or channel-to-channel failover mode. Only one type of failover mode can be implemented
per amplifier.
Device-to-Device Failover
All amplifiers support device-to-device amplifier chassis failover in case of fault. The redundant amplifier must be the same model as
the primary amplifier. A Failover Link Cable must be connected between the primary and redundant amplifier as shown below. Connect
ground to ground and Pin 1 of the primary amplifier to Pin 2 of the redundant amplifier; connect Pin 2 of the primary amplifier to Pin 1 of
the redundant amplifier.
Failover is triggered by one of the following conditions:
• Chassis fault on primary amplifier
• Channel fault on primary amplifier
• Loss of power to the primary amplifier
• Loss of CobraNet link to primary amplifier
• Loss of Failover Link Cable
• ELD-1/speaker line fault if enabled in software
Only faults (chassis and channel) trigger the failover mechanism. Abnormal conditions that do not immediately impair audio appear as
warnings, but do not trigger failover.
The redundant amplifier may be wired in parallel to the existing speaker line or it can be connected to a redundant speaker line. Relays
isolate the output terminals on the secondary amplifier unit. Relays are normally open. When a configuration is received, relays close on
the primary unit and remain open on the redundant unit. On failover, the relay states are reversed.
Device-to-Device Failover Wiring with Parallel Speaker Wiring
After replacing the faulty amplifier, a power cycle is required to recover from failover. This can be done either by physically repowering the
amplifiers or by performing a device reset in the Vocia software via the amplifier test tab. The amplifiers are required to be reset within 10
seconds of each other in order for the primary device to resume control.
VOCIA AMPLIFIERS VA-2060, VA-2060e, VA-4030, VA-4030e FAILOVER MODES
