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DB25 Pinouts
Analog Audio Connections
Aviom analog input and output modules with DB25 multi-pin connectors are wired to the analog pinout that
has become standard in the audio industry (which is sometimes referred to as the Tascam® DA-88 or DTRS
pinout). This wiring standard allows easy interfacing with a variety of audio equipment using readily-available
multi-pin breakout cables or by incorporating Aviom’s PB28 Modular Patch Bay products. Each DB25 jack on an
Aviom product carries eight balanced audio channels.
Note that digital devices that transmit AES3 digital audio data (sometimes referred to as AES/EBU) use a
different wiring pinout (see below); analog and digital multi-pin breakout cables and/or patch bays are not
interchangeable.
Wiring an Analog DB25 Cable
To wire a custom cable for use with the analog DB25 jacks on a Aviom product, use the following table:
DB25 Pin Number
Cable Number
1241225
2102311
321922
47208
518619
64175
715316
81142
No Connect 13
Hot Cold Ground
DB25 Panel-Mount Connector
The pins on panel-mounted DB25 jacks found on Aviom products are numbered according to the diagram
below.
13 12 11 10 9 8 7 6 5 4 3 2 1
25 24 23 22 21 20 19 18 17 16 15 14
Digital Audio Connections
Aviom AES3 digital audio modules and patch bay products with DB25 multi-pin connectors are wired to
accommodate two pinouts that are in use, conforming to either Yamaha® or Tascam/Digidesign® wiring
conventions. Each AES3 digital DB25 jack carries eight input and eight output channels. Aviom digital modules
are designed to accommodate either wiring format, but remember that cables must connect products that use
the same wiring format. You cannot attach a Yamaha format AES3 cable to a Digidesign product’s AES3 digital
DB25 jack directly, for example. Check the documentation that came with your third-party product before
purchasing or wiring breakout cables to ensure compatibility.
1157 Phoenixville Pike, Suite 201 • West Chester, PA 19380
Voice: +1 610.738.9005 • Fax: +1 610.738.9950 • ww w.Aviom.com
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DB25 Pinouts
Wiring a Digital DB25 Cable
Breakout cables for AES3 digital connections are readily available, and are typically configured as DB25-to-XLR.
To create a custom cable for the digital I/O connections on your Aviom product, use the following table. Be
sure to use the wiring pinout that matches the pinout for the device to which the Aviom digital device will be
connected. Separate pinouts are provided for the Yamaha and Tascam/Digidesign formats.
DB25
Pin
Yamah a
Compatible
DB25
Pin
Tascam/Digidesign
Compatible
1 Digital In 1/2 + 1 Digital Out 7/8 +
2 Digital In 3/4 + 2 Ground
3 Digital In 5/6 + 3 Digital Out 5/6 -
4 Digital In 7/8 + 4 Digital Out 3/4 +
5 Digital Out 1/2 + 5 Ground
6 Digital Out 3/4 + 6 Digital Out 1/2 -
7 Digital Out 5/6 + 7 Digital In 7/8 +
8 Digital Out 7/8 + 8 Ground
9 No Connect 9 Digital In 5/6 -
10 Ground 10 Digital In 3/4 +
11 No Con n e ct 11 Gr ou nd
12 Ground 12 Digital In 1/2 -
13 Gr ou nd 13 No Connect
14 Digital In 1/2 - 14 Digital Out 7/8 -
15 Digital In 3/4 - 15 Digital Out 5/6 +
16 Digital In 5/6 - 16 Ground
17 Digital In 7/8 - 17 Digital Out 3/4 -
18 Digital Out 1/2 - 18 Digital Out 1/2 +
19 Digital Out 3/4 - 19 Ground
20 Digital Out 5/6 - 20 Digital In 7/8 -
21 Digital Out 7/8 - 21 Digital In 5/6 +
22 Ground 22 Ground
23 Ground 23 Digital In 3/4 -
24 Ground 24 Digital In 1/2 +
25 Ground 25 Ground
Using DB25 Jacks
The DB25 panel-mount connectors on Aviom products have #4-40 UNC threads. Be sure to get DB25 breakout
cables with the correct thread type; forcing the connectors by using the wrong thread type will strip one or
more of the mating components rendering them unusable.
Strain relief is suggested when using DB25 cable assemblies. DB25 breakout cables should always be supported
when connected to an Aviom product to reduce the risk of damaging the product’s rear panel.
1157 Phoenixville Pike, Suite 201 • West Chester, PA 19380
Voice: +1 610.738.9005 • Fax: +1 610.738.9950 • ww w.Aviom.com
Aviom, A-Net , the A-Net ic on, Pro16, Pro6 4, and Virt ual Data Ca ble are tr ademark s of Aviom, Inc. A ll other tr ademark s are the pr opert y of their r espec tive owner s.
©20 07 Aviom, Inc. All r ights re serve d. Informa tion subje ct to cha nge withou t notice. P/N 9311 1013 0001 rev. 1.1 082907
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