Processing and Control for Professional AV Installations
Legacy Hardware


Menu ARCs consist of the original ARC and its replacement, the ARC-2. Their distinctive trait is an eight-character digital alphanumeric LED display. The Menu ARCs are RS-485 devices used to remotely control preset changes or module parameters within a SymNet system. They are designed to be mounted in a single-gang wall outlet (provided). The ARC-2 improves upon the original ARC in many ways.


The number of ARCs that can be daisy chained together will vary depending on the type of ARCs used and the cable lengths.  Download Link: ARC Power Calculator.

The ARC Audio port provides a means to either break-in or break-out a single balanced analog audio line from an ARCs CAT5 cable.  Note, not all ARCs support ARC Audio.

A single standard straight-through CAT-5/6 cable will provide power and data to an ARC from the host DSP.  The daisy-chain to subsequent ARCs also uses CAT-5/6.

Legacy DSPs that pre-date the ARC Port (RJ-45) communicate to ARCs with a twisted-pair (A, B, Ground) for RS-485 data.  In this scenario a local external transformer provides up to 24VDC to the ARC.

The ARC-2 and ARC-2i are versatile remote controllers that can hold up to twenty-four (24) total menu items and can easily be programmed to manage anything from gain, preset triggering, source selection, room combining and more.

Many installations require channel control on an external device, such as a television or satellite receiver.

Below are the easy step-by-step instructions to add this specific ARC-2 programming to your SymNet site file.  To begin, you will need to download the following link to the files containing the ARC-2 Channel Up/Down Super-Module, as well as the ARC-2 Programming.

Importing the ARC-2 Programming:

1)     Open the Controller Manager

2)     On the right side, bottom half, under File click “Import…”

3)     Use the drop down, select the Ring the ARC-2 will physically connect to

4)     Browse to the folder containing download files, highlight “channel_up_down_arc2” and click “Open”

5)     Expand the RS-485 network to verify that the “TV / SAT Channel Controls” ARC-2 remote was successfully imported

6)     Edit ARC-2 RS-485 address to match your hardware (default is 0)

Importing the Super-Module:

1)     Open your site file, navigate to the design view (signal path).

2)     Tools->Super-module Manager, click the “Import” button

3)     Browse to the folder containing download files, highlight “channel_Up_DownARC2_supermod” and click “Open”

4)     Now in the Toolkit, expand “Super-modules”

5)     Drag the “channel_Up_DownARC2_supermod” into your design

6)     Click the red triangle in upper right corner of super-module for a description of adjustable controls and parameters

7)     Open super-module control screen, make parameter adjustments if needed

8)     Turn “On” 232 String Output (be sure to add RS-232 string for up and down command) and/or Open Collector Output to trigger channel attenuation from the ARC-2/2i

9)     “Download Entire Site File to SymNet” and to the RS-485 network devices.

After completing these easy steps, the ARC-2 or ARC-2i will control the channels of the third party device.

An ARC’s power requirements vary depending on the voltage supplied to it. For example, an ARC-2e at 24V DC uses approximately 55 mA, while at 7V DC it uses approximately 170 mA maximum. As the voltage varies from 24 to 7 VDC, the current requirement increases accordingly. ARCs can be daisy-chained and fed power over this daisy-chain from an ARC-PSe or other device. However, as the length of the cable increases, so does the resistive line loss, which lowers the voltage available at each subsequent ARC. The actual power drain on each output from the powering device can vary substantially depending on the number of ARCs and the distance each of them is separated by. In order to assist with system design, Symetrix has available a Microsoft Excel spreadsheet that can help a system designer determine power requirements based upon cable length, number of ARCs and the power supply to be used.

Download Link: ARC Power Calculator.

One channel of audio can be sent either way.

The distance varies greatly depending on the type of ARC, the gauge of the cable, and the number of arcs chained together.  Download Link: ARC Power Calculator.

ARCs are extremely flexible and can be assigned virtually any real-time parameters depending on what host DSP it is controlling.  Generally ARCs are used for volumes, buttons, and presets.

Versions for punched metal and machined materials are provided below. A third drawing for the display window is also provided. Using these drawings, contractors may build their own custom ARC-2 front panels to match decor or specific needs.

ARC-2 Wall Bezel (Machine Version)

ARC-2 Wall Bezel (Punched Version)

ARC Window

ARC firmware is managed in Designer in the Controller Manager.

Tools > Controller Manager.