The following information is pulled from the ACU2 Techincal User Guide. For a comprehensive overview of the ACU2, please see the full guide:
View GuideThe ACU2 is a compact 48 kHz digital and audio distribution device that connects remotely located operator headsets, speakers, control panels and other peripherals to a central Target via the ACENet architecture. The ACU2 evolved from the ACU to provide four-channel stereo support in a reduced size.
A comprehensive overview of the ACU2 can be found in the Technical User Guide
| Compatible with | Voisus, Telestra |
| Part Number | ACU2-04-XX |
| Dimensions | 7.5" length x 7" width x 1.55" height |
| Weight | A packaged ACU2 weighs 2lbs. The included power supply weighs 0.5 lbs |
| Power Source | Individual power supply, included.
Note: When daisy-chained, the ACU2 requires a different power supply. Contact ASTi for details. |
| Power Consumption | +15VDC, 2 A |
| Mean Time Between Failure (MTBF) | 108,100.75 Hours (COTS) 48,390.23 Hours (military) |
| Impedance | 4.6 kΩ |
| Level | 3.25 Vpp max (6.5Vpp differential) |
| Gain | -8dB, +2dB to +57dB, software configurable* |
| Microphone Power | +12.5 VDC, software-enabled |
| Frequency Response | 20 Hz to 20 kHz, +/-1.5dB |
* The ACU2 gain covers a total gain range of 65 dB, with the range of +2 dB to +57 dB being settable in 1 dB steps, with -8 dB being available for input signals of greater than line level. The range -8 dB to +2 dB cannot be selected as a function of design.
| Impedance | 10 Ω |
| Current | 0.201 A at 8 Ω |
| Gain | -25dB to +10dB |
| Level | 1.61 VAC rms into 8 Ω |
| Power | 0.32 W at 8 Ω |
| Frequency Response | 20 Hz to 20 kHz |
| Max. Output Signal | 10 Vpp |
This device works as a transportation mechanism, passing audio from one device to another until it reaches the headset or computer; this device does not store the audio.
| Type | Size | User Modifiable | Function | Process to Clear |
|---|---|---|---|---|
| Micro-controller Internal SRAM | 69 KB | No | Used as RAM for an internal MCU | Remove Power Count to 30 Restore Power |
| Type | Size | User Modifiable | Function | Process to Clear |
|---|---|---|---|---|
| Micro-controller Internal | 256 KB | Yes | Firmware | None |
| Flash | 8 Mb | Yes | Firmware | None |
RJ-12 Pinout for RS-422
(Serial Connection)
RJ-12 Pinout for RS-232
(Serial Connection)
DB-15 Connector
(Audio Interface)
RJ-45 Pinout
(ACENet Connection)
ASTi warrants to the buyer and its customers that all items delivered and all services rendered hereunder will conform to the requirements hereof and will be free from defects. In addition to other remedies that may be available at law or in equity, the buyer, at its option, may return to ASTi any nonconforming or defective items or require correction or replacement of the item, all at ASTi’s risk and expense. If Buyer does not require correction or replacement of nonconforming or defective items, ASTi shall repay such portion of the contract price or such additional amount as is equitable under the circumstances.
Warranty period: 12 months from shipment date