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Home | Products | PA/GA systems | NCU PA line monitoring module

NCU PA line monitoring module

NCU PA line monitoring module is designed to monitor earth faults and short circuits, as well as to monitor resistance and line break of 100 V loudspeakers.

Rated voltage
48 VDC
Supply voltage range
from 36 to 60 VDC
Maximum power consumption
10 W
Number of controlled loudspeaker lines
4, 8, 12, 16, 20, 24, 28 or 32*

Maximum power per line at 100 V
500 W
Communication interface via Ethernet line (two Ethernet ports, one of which is a reserve)
Number of ports Ethernet 100BaseTX
Protocol for transmitting information about the state of lines and device
SNMP v.2
Protocol for device configuration
Measurement interval
2 min/ 5 min/ 10 min/ 15 min/ 30 min/ 1 h/ 2 h/ 3 h/ 6 h/ 12 h/ 24 h/ Disabled
Measurement frequency
16 kHz
OLED display with three-line alphanumeric indication
1U 19"
Electrical protection class by GOST IEC 62368-1-2014
Climatic category under GOST 15150-69
Ambient air permissible temperature range
from - 5 to + 55 ºC
Atmospheric pressure
from 84,0 to 106,7 kPa
Relative humidity at +25 ± 2 °С
no more 80 %
Protection level by GOST 14254-2015 (IEC 60529:2013) (IP code)
234 х 482 х 43 mm
Maximum weight
2,5 kg
* Depending on the number of connected NCU-REL Relay module for 4 lines

To perform all product functions, at least one NCU-REL relay module must be connected to the NCU. Depending on the number of connected NCU-REL relay modules, up to 32 loudspeaker lines can be monitored. Maximum number of NCU-REL relay modules connected to the NCU is 8 pcs.

NCU PA line monitoring module is used in public address systems in metallurgical, chemical, oil refining, gas and oil-producing industries and similar to them in terms of application, as well as on transport.

  • Control up to 32 loudspeaker lines;
  • Periodic measurements with an adjustable interval from 2 minutes to 24 hours;
  • Monitoring loudspeaker lines for ground faults, short circuits, impedance deviations and line breaks;
  • Connection interface – 100BaseTX Ethernet;
  • Ethernet connection redundancy;
  • OLED display for providing information;
  • Remote monitoring via SNMP;
  • Transfer of information about status of device and loudspeaker lines to UMCS monitoring system;
  • Supply voltage – 48 VDC.