Siemens ZAC-40 (500-035400) is a zone amplifier card with two speaker zones and one 40 W audio amplifier that runs at 25 VRMS or 70 VRMS. It is a CAN data bus card that takes its control and audio from the DAC-NET digital audio card.
The two speaker zones can be wired as a single Class A zone, a single Class B zone, or two independently protected Class B zones for split or interleaved coverage. A ZAC-40 can also serve as a backup amplifier for other ZAC-40 cards, in a one-to-one or one-to-many backup arrangement. Audio reaches the card over the ASI (Audio Serial Interface) in assigned timeslots, and the card reports its status to the DAC-NET over the CAN bus, using one DAC-NET sub-address.
Specifications
| Amplifier |
Class D, 40 W RMS |
| Output voltage |
25 VRMS or 70 VRMS |
| Speaker zones |
2 (one Class A, one Class B, or two Class B) |
| Efficiency |
About 80% at full load |
| Control |
CAN bus from DAC-NET, 1 sub-address |
| Audio |
ASI digital audio stream, FPGA controlled |
| Inputs |
Isolated local audio input and one switch input |
| Firmware |
Update via PMI, PMI-2 or PMI-3 |
Features
- Amplifier supervised for function and protected against open, short, over current and over modulation
- Speaker lines supervised for open, short and ground fault
- Local audio input is isolated to prevent ground loops and is switched on or off over the CAN bus
- Switch input can be set in the ZEUS tool to activate the local audio input
- Can back up other ZAC-40 amplifiers one-to-one or one-to-many
Related models
- DAC-NET: digital audio card that supplies audio and control to the ZAC-40
Documents
FAQ
What does the ZAC-40 connect to?
It receives its control and audio data from the DAC-NET card and reports status to the DAC-NET over the CAN bus, taking one DAC-NET sub-address.
How can the two speaker zones be wired?
As a single Class A zone, a single Class B zone, or two independently protected Class B zones for split or interleaved speaker zones.
Can it be used as a backup amplifier?
Yes. A ZAC-40 can back up other ZAC-40 amplifiers in a one-to-one or one-to-many arrangement.
Which speaker voltages does it support?
The 40 W amplifier operates at either 25 VRMS or 70 VRMS.
