AMX 16-Channel Custom Panel Interface AXP-CPI16 Specifications download pdf (Page 24)

RMa750 Programming Definitions Monday, 10 July 2000

page 6

OUTPUTS.

Channel Mutes (normally high and thus un-muted)

Channels 1 to 6 act as mute control.

Channel 1 = Channel 1 of the amplifier

Channel 2 = Channel 2 of the amplifier

Channel 3 = Channel 3 of the amplifier

Channel 4 = Channel 4 of the amplifier

Channel 5 = Channel 5 of the amplifier

Channel 6 = Channel 6 of the amplifier

Sending these channels low will mute the appropriate amplifier channel.

For whatever reason you may want to mute a channel or channels. It must be noted that in muting a

channel (with signal applied) you will invoke the input to output fault circuitry. The mute is internal

in the amplifier and alters the amplifiers input to output gain thus invoking a false fault report. The

program should be written to ignore Input to Output faults in this state.

A diagnostics mode could be instigated where to check the integrity of the in/out fault detect circuit

you deliberately mute the amplifier to invoke the fault.

NOTE: If the amplifier goes into thermal protect mode then the muting of the channels by the

amplifier’s internal circuitry will also invoke an in/out fault per channel. The amplifier going into

thermal protect may be considered as an operational mode or state and is not necessarily a fault.

Now comes all the awkward bits and where you have to make decisions. As you can see, a lot of the

monitoring and control aspects interact. This interaction can be used to make decisions for

redundancy aspects but complicates programming and creates a lot of activity on the buss and may

slow up response time.

As you have seen, if the amplifier goes thermal or if a channel is remotely muted than an in/out

fault is reported. You can ignore or use the in/out fault report to the system and deal with them any

way you wish but you must remember that a fault has to be reset or it remains a fault.

We will include an ability on the interface (which will be selectable) to not have in/out faults report

to the system when the amplifier is in thermal protect mode or when a system command mutes a

channel or channels of the amplifier and /or have the reset feature automated by the amplifier when

recovering from a thermalled state or system un-muting.

You are employing the use of the amplifier and we are happy to have your input here as to what the

default states should be for your installation.

Channel Relays (normally high and thus load connected)

Channels 7 to 12 can be used to open the relays of individual channels.

Channel 7 = Channel 1 of the amplifier

Channel 8 = Channel 2 of the amplifier

Channel 9 = Channel 3 of the amplifier

Channel 10 = Channel 4 of the amplifier

Channel 11 = Channel 5 of the amplifier

Channel 12 = Channel 6 of the amplifier

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AMX 16-Channel Custom Panel Interface AXP-CPI16 Specifications Page 24