RU-NFD Modules: A Comprehensive Overview
Are you in search of Dante audio network interface products that are compatible with RDL Format-A twisted pair products? Look no further than the RU-NFD modules! These modules are perfect for commercial and industrial installations and can be mounted in equipment racks, closets, conference tables, and on shelves or backboards.

The RU-NFD is designed for use as an RDL Format-A sender/distributor and is compatible with a Dante-enabled network. It easily converts three Dante audio channels to RDL Format-A, with each network channel corresponding to Pair A, B, or C of the Format-A outputs. Additionally, the unit converts a fourth Dante audio channel to a balanced line-level AUX output.

Features
The RU-NFD has a front-panel green signal LED that corresponds to each of the four Dante input channels, with received audio level indicated on the variable-intensity LED indicator. The Format-A output is distributed to three separate rear-panel RJ45 jacks, with each Format-A output jack providing up to 200 mA of power to connected Format-A receivers. Multiple receivers may be daisy-chained from one output jack, or may be connected by home run to each of the three outputs.

Compatibility
The RU-NFD output jacks support the entire range of Format-A receivers, making each output pair available for end-user connection on various wall plates or feeding other equipment using rack-mounted, shelf-mounted, or utility Format-A receivers. The wide array of Format-A receivers provide compatibility with commercial audio equipment operating at standard professional levels.

Power
The RU-NFD is powered from an external 24 Vdc power supply, which is available separately and powers the RU-NFD and Format-A receivers connected to all three Format-A outputs. The unit is also equipped for PoE, which powers it and Format-A receivers connected to the primary Format-A output jack. Audio is also distributed to the other two output jacks.

Construction
The RU-NFD is constructed in a durable, professional all-metal enclosure suitable for free-standing, surface-mounted, or rack-mounted operation. This full-featured product is engineered and manufactured in the U.S.A. for continuous duty in demanding installations. Built to last. Built to outperform.

Key Features

• The RU-NFD modules are audio network interface products that work with RDL Format-A twisted pair products.
• These modules can be installed in equipment racks, closets, conference tables, and shelves or backboards in commercial/industrial installations.
• They convert four Dante network audio signals to RDL Format-A and Aux.
• Installation is made easy with Format-A connections on RJ45 through CATx cable.
• Three Dante audio signals feed Format-A output pairs A, B, and C.
• The fourth Dante audio signal feeds an auxiliary balanced +4 dBu line output.
• Format-A pairs are distributed to three separate Format-A output jacks.
• Signal LEDs indicate audio for each of the four received network signal channels.
• The modules feature high-resolution 24-bit digital to analog conversion.
• RDL's legendary analog filtering enhances superb audio performance.
• The primary output jack powers remote Format-A receivers.
• An external 24 Vdc supply can power Format-A receivers through all output jacks.
• LED indicators show network sync status.
• Outputs mute when digital audio inputs are inactive.
• The modules can operate normally or in hot-standby mode from PoE (Model RU-NFDP).
• They are compatible with a wide array of RDL Format-A active and passive receivers.
• The modules are equipped for rack mounting or surface mounting.

Technical Specifications

Network Connector
RJ45 with Link and Speed indicators
Digital Audio Ethernet Protocol
Dante
Transmission Rate
100 Mbps
Sample Rates Supported
44.1 kHz, 48 kHz (default)
Bit Depth Supported
24 bits
Audio Operating Levels
-18 dBFS = +4 dBu
Format-A Outputs
RDL Format-A RJ45 (3)
Format-A Signal Pairs Used (3)
A, B, C (each Format-A output)
Frequency Response
20 Hz to 20 kHz (± 0.75 dB)
THD+N
< 0.1%
Noise below +4 dBu
< -85 dB (pair active); < -100 dB (pair muted)
Crosstalk
< 80 dB (20 Hz to 20 kHz)
Headroom above +4 dBu
> 18 dB
AUX Output
Output
Balanced, detachable terminal block
Output Level
+4 dBu (nominal)
Output Impedance
150 Ω balanced; 75 Ω unbalanced
Frequency Response
20 Hz to 20 kHz (± 0.5 dB)
THD+N
< 0.1%
Noise below +4 dBu
< -75 dB
Crosstalk
< 80 dB (20 Hz to 20 kHz)
Headroom above +4 dBu
> 18 dB
Indicators (12)
Power In (1); Power Out (3); Audio Signal LEDs (4), Network Sys and Sync (2), Ethernet Link and Speed (2)
Power Connections (2)
Power Jack; Detachable Terminal Block
Ambient Operating Environment
0 Degrees C to 40 Degrees C
Power Requirement
24 Vdc @ 120 mA plus connected loads, or PoE (RU-FNP)
PoE (RU-NFDP)
Class 0, IEEE 802.3af
Dimensions
5.8” (15 cm) W; 1.7” (4.3 cm) H; 5.2” (13.2 cm) D
Package Type
Cardboard Box
Package Dimensions
6 x 6 x 2.625 in.
Shipping Weight
1.605 lbs. (RU-NFD); 1.63 (RU-NFDP)