Aritech IU2080NC Addressable Supervised Output Module

1. Product Name: Aritech IU2080NC Addressable Supervised Output Module

2. Description:

What Is the Aritech IU2080NC Addressable Supervised Output Module?

The Aritech IU2080NC is an intelligent, addressable, supervised output module designed to control warning devices such as sounders and beacons, or other equipment requiring supervision. It is compatible with all fire alarm control panels supporting the 2000 series protocol. Its high output capacity enables a single module to meet most warning circuit requirements.

Operating Principle

The module communicates with the panel via the loop, while the warning circuit load is supplied by an external 24 VDC power supply; this prevents sounder current from loading the detection loop. The output circuit is continuously monitored for open and short circuits using a 10 kΩ end-of-line resistor and a reverse-polarity 1,7 VDC supervisory voltage. The external supply voltage is also monitored, and a low-voltage fault is reported if it falls below 19,7 VDC. The output can be configured for continuous or intermittent (pulsed) operation, making it easy to provide distinctive audible warnings for different alarm conditions.

Role in Fire Detection Systems

Reliable operation of warning devices during evacuation is vital. The IU2080NC integrates conventional sounder and beacon circuits into an addressable system, allowing each circuit to be controlled individually from the panel and continuously supervised. All module operation is configured via the control panel, enabling flexible arrangements for zoned or phased evacuation scenarios.

Why Choose It?

• Supervised output: The warning circuit is continuously monitored for open and short circuits.
• Does not load the loop: The warning load is powered by an external supply.
• Supply monitoring: The panel is alerted if the external supply voltage drops.
• Flexible programming: Continuous and intermittent output functions are configured via the panel.
• Easy addressing: Accurate address setting using a decimal rotary switch; approved to EN54-18 and CPR-certified.

Installation and Commissioning

The IU2080NC is surface-mounted and connected to a compatible fire alarm control panel via a two-wire loop. The warning circuit also requires a separate auxiliary power supply approved to EN 54-4, with a voltage range of 20,1–28 VDC; only one IU2080NC may be powered by each power supply. The address is set using a decimal rotary switch within the range 1–128 and is retained during power failures. A 10 kΩ end-of-line resistor is fitted at the end of the warning circuit. When calculating the circuit load, ensure that the output load does not exceed 3 A at 20 °C or 2,04 A at 55 °C, and is at least 100 mA.

Technical Specifications

• Status indication: LED
• Compatibility: Aritech 2000 series systems
• Addressing method: Rotary switch
• Address range: 1 – 128
• Supply type: 24 VDC, loop-powered
• Operating voltage: Panel loop: 17–28 VDC / External supply: 20,1–28 VDC, low-voltage detection < 19,7 VDC
• Current consumption: Panel loop (standby): <250 μA, typically <200 µA / Panel loop (active): <3,5 mA
• Max. output load: 3,00 A @ 20 °C / 2,04 A @ 55 °C
• Min. output load: 100 mA (for lower loads, add a series resistor to the diode)
• External power supply: EN 54-4 approved; only one IU2080NC should be powered from each source
• Number of outputs: 1
• Output type: Supervised
• Monitoring voltage: 1,7 VDC, reverse polarity
• End-of-line resistor: 10 kΩ, 5%, ¼ W
• Short-circuit threshold @ 24 VDC: <4,5 kΩ
• Standby range @ 24 VDC: 5,5 – 16 kΩ
• Open-circuit threshold: >20 kΩ
• No-load current consumption (standby): <11 mA @ 24 VDC, <12 mA @ 28 VDC
• No-load current consumption (active): <69 mA @ 24 VDC, <70 mA @ 28 VDC
• Dimensions: 175 x 124 x 51 mm
• Net weight: 325 g
• Colour: White
• Mounting type: Surface-mounted
• Cable entry: 1
• Material: Plastic
• Operating temperature: −10 to +55 °C
• Storage temperature: −20 to +60 °C
• Relative humidity: 10%–95% (non-condensing)
• Environment / protection rating: Indoor, IP40
• Compliance: CE, REACH, RoHS 3, WEEE
• Certification / Standard: CPR, EN54-18

Applications

• Monitoring of conventional sounder and beacon circuits
• Staged evacuation scenarios
• Alert groups in car parks and large spaces
• Integration of existing alert circuits into an addressable system
• Monitoring of auxiliary equipment requiring supervision
• Commercial and industrial buildings

Compatible Products

IU2080NC works with Aritech addressable panels such as the 2X-A series, which use the 2000 series protocol. The same family includes the IO2034NC 4-input 4-output module for relay output and contact monitoring, the IU2050NC input module for monitoring a single contact, and the IU2055NC zone module for conventional detector zones. For addressable alerting powered from the loop, the AS2363 addressable sounder can be considered as an alternative.

Frequently Asked Questions

Is the sounder load powered from the loop? No. The alert circuit is powered by an external auxiliary power supply; the loop is used only for module communication and its own operation.

Is an external power supply fault detected? Yes. If the supply voltage falls below 19,7 VDC, the module reports a low-voltage fault to the panel.

Can the output operate intermittently? Yes. The output can be programmed to operate continuously or in pulses from the panel.

At Narstek, we provide project support for alert circuit calculations, power supply selection and commissioning of Aritech 2000 series systems. Contact us to request a quote for the IU2080NC.