Biamp VA-4030e - Manual (Page 13)

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Channel-to-Channel Failover
All amplifiers support channel-to-channel failover. This is configured in the Vocia software in the amplifiers general setting as 1:1 Failover.
In this configuration, channel pairs can be specified and adjacent channels will act as a redundant backup. Channel 2 will act as backup for
channel 1. For the VA-4030 and VA-4030e models, channel 4 will act as backup for channel 3.
Additionally the VA-4030 and VA-4030e amplifiers support 3:1 channel redundancy. This is configured in the Vocia software in the amplifiers
general setting as 3:1 failover. In this configuration channel 4 will act as a redundant backup for channel 1, 2 or 3.
1:1 or 3:1 channel failover is triggered by one of the following conditions:
• Heatsink fault (over temperature)
• Short circuit fault
• Channel failure fault
• ELD-1/speaker line fault if enabled in software
The redundant channel may be wired in parallel to the existing speaker line or connected to a redundant speaker line. The primary amplifier
module will resume control after the fault condition is cleared and the unit is re-powered.
Channel-to-Channel Example: Parallel Wiring and Redundant Speaker Topology
3:1 Failover Speaker Wiring
VOCIA AMPLIFIERS VA-2060, VA-2060e, VA-4030, VA-4030e FAILOVER MODES