Digital Output Module DOM4-8

583361.22

Approval: G 210122
Part of EN 54-16


DOM (Digital Output Module) is the central control element of VARIODYN® D1. It has interfaces to all input/output assemblies, administers, and monitors the loudspeaker circuits. For voice alarm systems as per DIN VDE 0833-4 and electro-acoustic emergency warning system per EN 60849.
Any complex system configuration can be implemented through the networking of multiple DOMs via Ethernet.
All power amplifiers are permanently monitored. In case a power amplifier is faulty, it can be replaced dynamically by a spare amplifier. The switchover is done automatically via the DOM.
The loudspeaker lines are permanently monitored for short circuit, ground fault, failure as well as impedance deviation. Faulty loudspeaker zones are separated in a non-reacting manner.
A DOM contains storage capacity for preset announcements, which can be used for alarm texts and signals (escape alarm, caution signal) and warning signals (gongs). The volume of each source and each amplifier channel can be controlled. Additional filters like parametric equalizer, high-and low pass filter as well as delays are available as well. All errors are recognized, displayed and recorded within few seconds meeting the standards. For special applications like e.g. tunnel, delays can be programmed up to 9.9 sec.
The control unit DOM4-8 is equipped with 4 independent amplifier channels in order to operate 8 loudspeaker areas or 4 loudspeaker circuits in VARIODYN® D1 loop technology. There is also the option of mixing loop and spur technology with a DOM.
  • Approved as per EN54-16
  • Compliant with IEC 60849
  • All functions of an alarm and evacuation system in a 19"-module (DOM)
  • Networkable via Ethernet, build in 4 port switch
  • Permanent monitoring of all functionally relevant system parts
  • Automatic and dynamic switchover to redundant spare amplifiers
  • Automatic volume control (AVC) also during announcements
  • Remote monitoring and configuration via network
  • 24 V DC emergency power supply
  • Spur technology and/or loop technology in "VARIODYN D1 loop technology"
  • Connection to a NTP server via Ethernet is possible
  • Voice and audio memory up to 1 hour


Additional Information:

The DOM components are provided “neutrally”. Please use one ventilation field Part No. 583708.HO for each DOM.
Output impedance> 5 kΩ, < 500 pF
Load impedancetyp. 200 Ω
Input typesymmetrically
Signal/Noise ratio Output> 70 dB / 75 dB (A)
Signal/Noise ratio Input> 60 dB / 65 dB (A)
Weight kg approx. 5.7 kg


Channel separation> 75 dB
Harmonic distortion at nominal level< 0.03 % @ 1 kHz
Contact load relay100 V DC / 1 A
Power consumption40 / 70 W
max. Outputlevel< 6 dBu
Rated frequency47 ... 440 Hz
Nominal level for emergency telephone station0 dBu
Nominal level Output0 dBu
Nominal level Input-51 dBu
Rated voltage90 .. 264 V AC
Emergency power supply24 V DC
Air humidity15 ... 90 % (non-condensing)
Transmission range20 ... 20000 Hz; 100 ... 8000 Hz
Ambient temperature-5 °C ... 55 °C
DimensionsW: 483 mm H: 44 mm D: 349 mm (1 HU, 19")
  • 583451.21 Cable for cabinet rear panel DOM4-8
  • 583486 patch cable CAT5 , 1 m yellow (Ethernet)
  • 583487 patch cable CAT5 , 2 m yellow (Ethernet)
  • 583488 patch cable CAT5 , 3 m yellow (Ethernet)
  • 583496 End-of-line module (EOL)
  • 581316 Microphone, for AVC
  • 583703 Mounting set 1
  • 583342 Loop Isolator Module
  • 583708.HO Ventilation panel 1 HU with Honeywell Logo