Logic I/O
The Logic I/O connector on the NM-1 facilitates redundant device failover only. It is not a general-purpose
contact closure interface. See the Amplifier-to-Amplifier Failover section below.
Page Active Relays
An optional Page Active Relay card can be added to the VA-8600(c) to provide a contact closure audio
activity is detected on a particular output channel. Please see the PARM-1 datasheet or manual for
operating instructions. Note that if the Page Active Relay module is being used 3:1 or 7:1 failover will not
be available as it requires the failover module to be placed in slot 9 (as well). Channel to Channel failover
does not require a module and therefore can be used in conjunction with the PARM-1 card.
AM-600/AM-600c
A VA-8600 or VA-8600c chassis can be populated with up to eight AM-600 or AM-600c cards. The
AM600c reports a fault if it detects a short to ground on a speaker line, where this short would
compromise the capability of the amplifier to deliver emergency messages
Amplifier Output Connections
Use the yellow plug-in barrier strip connectors to connect loudspeaker level outputs. If stranded speaker
wire is used, be sure to incorporate all strands into the connector, as stray strands can short to the
adjacent terminal or chassis. Do not leave excessive bare wire outside the terminals, as this can lead to
shorts.
Please note: The VA-8600 and VA-8600c are powerful amplifiers and can damage loudspeakers. Please
treat the VA-8600 and VA-8600c outputs as you would AC mains power outlets. Always check the
loudspeaker’s continuous and peak power capabilities and match the amplifier settings accordingly.
CAUTION
All Speaker wiring connections should be made by qualified personnel and with the amplifier power removed. The 100V output
requires Class 3 wiring. Please refer to a qualified electrician or other qualified person according to local codes.
