ACE Communication Unit - 2nd Gen (ACU2)

The ACU2 is a compact 48kHz 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 4 channel stereo support in a reduced size.

A comprehensive overview of the ACU2 can be found in the Technical User Guide.

General Specifications

Compatible with Telestra
, Voisus
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. Can be daisy chained*.
*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 (Mil)

Audio Input/Output

Audio Input

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 65dB, with the range +2dB to +57dB being settable in 1dB steps, with -8dB being available for input signals of greater than line-level. The range -8dB to +2dB CANNOT be selected as a function of design

Audio Output

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

Memory Devices

This device works as a transportation mechanism, passing audio from one device to another until it reaches the headset or PC; this device does not store the audio.

Volatile Memory

Memory whose contents are lost when power is removed.

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

Non-Volatile Memory

Memory whose contents are retained when power is removed.

Type Size User Modifiable Function Process to Clear
Micro-controller Internal 256 KB Yes Firmware None
Flash 8 Mb Yes Firmware None

Media

The ACU2 does not contain media storage capability (i.e., removable or non-removable disk drives, tape drives, memory cards, etc.)


Pinouts

Serial Connection