Studio Technologies Model 545DC Dante to 2-Channel Party Line Intercom Interface


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    M545DC - Overview

    The Studio Technologies Model 545DC Intercom Interface allows two single-channel analog party-line (PL) intercom circuits and associated user devices to be incorporated into Dante® audio-over-Ethernet applications. Single-channel analog party-line (PL) intercom systems are commonly used in theater, entertainment, and education applications where a simple, reliable, low-cost, and easy-to-use solution is desired.

    Dante has become a major method of interconnecting audio signals and various devices using standard Ethernet networks. The Model 545DC directly supports both analog party-line (PL) and Dante, providing excellent performance in both domains. Single-channel analog partyline (PL) products from Clear-Com® are directly compatible with the Model 545DC. The Dante audio-over-Ethernet media networking technology is used to transport the send and receive audio channels associated with the two single-channel party-line (PL) circuits. The Model 545DC's two hybrid circuits with automatic nulling action provide good separation of send and receive audio with high return loss and excellent audio quality. (These hybrid circuits are sometimes referred to as 2-wire to 4-wire converters.) The Model 545DC's digital audio signals are compatible with all equipment that utilizes Dante technology.

    An Ethernet connection is all that's required to make the Model 545DC part of a sophisticated, networked audio system.

    • Features:

      • Dante audio-over-Ethernet technology
      • Integrated party-line intercom power sources
      • Analog hybrids with auto null capability
      • Input and output level metering
      • Excellent audio quality
      • PoE and 12 VDC powering
      • Standard connectors
      • Table-top, portable, or optional rack-mount use
    • Specifications:

      • Power Sources
      • Power-over-Ethernet (PoE): class 3 (mid power) per IEEEr 802.3af
      • External: 10 to 18 volts DC, 1.0 A max at 12 volts DC

        Network Audio Technology
      • Type: Dante audio-over-Ethernet
      • AES67-2018 Support: yes, selectable on/off
      • Dante Domain Manager (DDM) Support: yes
      • Bit Depth: up to 24
      • Sample Rate: 48 kHz
      • Dante Transmitter (Output) Channels: 2
      • Dante Receiver (Input) Channels: 2
      • Dante Audio Flows: 4; 2 transmitter, 2 receiver
      • Analog to Digital Equivalence: a -10 dBu analog signal on a party-line interface channel results in a Dante digital output level of -20 dBFS and vice-versa

        Network Interface
      • Type: 100BASE-TX, Fast Ethernet per IEEE 802.3u (10BASE-T and 1000BASE-T (GigE) not supported)
      • Power-over-Ethernet (PoE): Per IEEE 802.3af
      • Data Rate: 100 Mb/s (10 Mb/s and 1000 Mb/s not supported)

        General Audio
      • Frequency Response (PL to Dante): -0.3 dB @ 100 Hz (-4.8 dB @ 20 Hz), -2 dB @ 8 kHz (-2.6 dB @ 10 kHz)
      • Frequency Response (Dante to PL): -3.3 dB @ 100 Hz (-19 dB @ 20 Hz), -3.9 dB @ 8 kHz (-5.8 dB @ 10 kHz)
      • Distortion (THD+N): <0.15%, measured at 1 kHz, Dante input to PL interface pin 2 (0.01% pin 3)
      • Signal-to-Noise Ratio: >65 dB, A-weighted, measured at 1 kHz, Dante input to PL interface pin 2 (73 dB, PL interface pin 3)

        Party-Line (PL) Intercom Interfaces: 2
      • Type: single-channel analog PL (XLR pin 1 common; XLR pin 2 DC; XLR pin 3 unbalanced audio)
      • Compatibility: single-channel PL intercom systems such as those offered by Clear-Comr
      • Power Source, XLR Pin 2: 28 volts DC, 150 mA maximum
      • Impedance, XLR Pin 3 - Local PL Power Not Enabled: >10 k ohms
      • Impedance, XLR Pin 3 - Local PL Power Enabled: 200 ohms
      • Analog Audio Level, XLR Pin 3: -14 dBu, nominal, +7 dBu maximum
      • Call Light Signal Support, XLR Pin 3: DC voltage on pin 3; detects at >= 5 5 volts DC nominal; generates at 16 volts DC nominal
      • Mic Kill Signal Support, XLR Pin 2 - Local Power Enabled: momentary break in DC voltage

        Party-Line (PL) Hybrids: 2
      • Topology: 3-section analog circuitry compensates for resistive, inductive, and capacitive loads
      • Nulling Method: automatic upon user initiation, processor implements digital control of analog circuitry; settings stored in non-volatile memory
      • Nulling Line Impedance Range: 120 to 350 ohms
      • Nulling Cable Length Range: 0 to 3500 feet
      • Trans-Hybrid Loss: >55 dB, typical at 800 Hz

        Meters: 4
      • Function: displays level of audio input and output channels
      • Type: 5-segment LED, modified VU ballistics

      • Party-Line (PL) Intercom: two, 3-pin male XLR
      • Ethernet: Neutrik etherCON RJ45 jack
      • External DC: 4-pin male XLR
      • USB: type A receptacle (used only for updating application firmware)
      • Configuration: requires Studio Technologies' STcontroller software application
      • Software Updating: USB flash drive used for updating application firmware; Dante Updater application used for updating Dante interface firmware

      • Operating Temperature: 32 to 122 degrees F
      • Storage Temperature: -40 to 158 degrees F
      • Humidity: 0 to 95%, non-condensing
      • Altitude: not characterized

      • 8.70 inches wide
      • 1.72 inches high
      • 8.30 inches deep
      • Weight: 1.7 pounds; rack-mounting installation kits add approximately 0.2 pounds

    M545DC - Required Accessories

      California Residents:
      Cancer and Reproductive Harm -