A24205-A334-B832 (Edition 1)
P/N 315-035600-2
2
•
Speaker lines are supervised for open, short circuit and ground fault
•
The ZAM-180 is micro controller controlled
•
A FPGA controls the digital audio data stream (ASI Bus) transmitted
by the DAC-NET
•
SW update via PMI
OPERATION
The ZAM-180 receives its control and communication data from the DAC-NET
and sends its status data to the DAC-NET via the CAN Bus. Therefore it takes
1 sub-address of the DAC-NET.
The transmission of compressed or
uncompressed audio data from the DAC-NET
to the ZAM-180 is realized via ASI (Audio Serial
Interface). Transmission on the ASI is executed
with a timeslot method and is synchronized
with Frame and Bit Synchronize Signals. Via
control data on the CAN Bus, the timeslots are
allocated to each ZAM-180. Each ZAM-180 is
configured to listen to its corresponding
timeslot.
A local audio input is provided to connect an
external audio source. The audio input is
isolated on the ZAM-180 to prevent ground
loops. The local audio input is activated via an
external contact. The control of this input will
be executed by the amplifier directly. The
ZAM-180 will send a message informing the
DAC-NET that the ZAM-180 has turned on the
local input. It is also possible to
activate/deactivate the local input on the
control panel via CAN bus.
The speaker lines are individually supervised
for open and short circuit. Ground fault is
detected in common for both speaker lines
on each ZAM-180.
The speaker lines are supervised in both the
inactive and active state. The speakers must
be AC-coupled.
Controls and Indicators
The ZAM-180 has one Reset button, eight diagnostic LEDs, level adaptation
of the local external audio input and the CAN address switches, one terminal
block, two terminal connections and two 60 pin flat ribbon connections as
shown in Figure 2
.
A reset switch is located on the top of the front panel. Pushing the reset
switch re-initializes the ZAM-180 operation.
Figure 2
Terminal Blocks, Controls and Indicators
Terminal Connections
Power Input
24VDC @ 12A
CAN
TO CC-5
24V
0V
