Aritech IU2050NC Addressable Single Input Module

1. Product Name: Aritech IU2050NC Addressable Single Input Module

2. Description:

What Is the Aritech IU2050NC Addressable Single Input Module?

The Aritech IU2050NC is a single-input interface module used to connect an external contact to 2000 series addressable fire panels. Its selectable line monitoring allows it to monitor normally open (NO) or normally closed (NC) contacts. It is loop-powered and supplied in an enclosure suitable for surface mounting.

Operating Principle

The module receives both power and data via the two-wire loop. It detects changes in the connected contact’s status and transmits them to the panel using an advanced, error-correcting digital protocol. It is suitable for applications requiring a fast response, with changes reported within 3 seconds. The input line is monitored using a 150 kΩ end-of-line resistor, so cable faults are also indicated at the panel. The address setting is retained and is not lost if power is interrupted.

Role in Fire Detection Systems

The IU2050NC makes a non-addressable point addressable and monitored, so it appears on the panel with precise location information. Signals from devices such as conventional manual call points, door monitoring contacts, sprinkler flow switches and fire suppression system status contacts can therefore be monitored as individual points. This allows the operator to identify immediately which switch has been activated.

Why Choose It?

• Loop-powered: No additional power supply or cabling is required.
• Programmable input: The input can be configured for normally open (NO) or normally closed (NC) contacts.
• Fast reporting: Suitable for applications requiring changes to be reported within 3 seconds.
• Easy addressing: A numerical address can be set directly using rotary switches.
• Approved product: Complies with the EN54-18 standard; VdS and BOSEC certified.

Installation and Commissioning

The module is surface-mounted close to the contact being monitored; the cable length between the module and the end-of-line resistor must not exceed 10 metres. The loop is connected using a two-wire cable, and the address is set with rotary switches. Line monitoring is provided by connecting a 150 kΩ end-of-line resistor at the end of the input line. The input type and panel response are configured via the fire panel during commissioning.

Technical Specifications

• Compatibility: Aritech 2000 series systems
• Operating voltage: 17–28 VDC
• Current consumption: <205 μA (standby) / <270 μA (active)
• Communication voltage: 4 – 10 V
• Number of inputs: 1
• Input type: Monitored
• End-of-line resistor: 150 kΩ, ¼ W, 5%
• Cable length between module and end-of-line resistor: max. 10 m
• Response time: <1 s (depending on panel programming)
• Dimensions: 125 x 90 x 35 mm
• Net weight: 144 g
• Colour: Cool grey
• Mounting type: Surface-mounted
• Cable entry: 1
• 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 2
• Certification / Standard: CPR (0370-CPR-2858), BOSEC, VdS, EN 54-18

Applications

• Monitoring sprinkler flow switches
• Addressing conventional manual call points
• Monitoring fire door and escape door contacts
• Fire suppression system status signals
• Monitoring valve position (tamper) switches
• Technical equipment fault contacts

Compatible Products

The IU2050NC is compatible with 2X-A series addressable panels supporting the Aritech 2000 series protocol. Manufacturer data lists the IO2034NC 4 input 4 output module, IU2080NC monitored output module and IU2055NC conventional zone module, as well as the ISM-95 isolator module, as compatible products in the same family.

Frequently Asked Questions

Which contact types can the IU2050NC monitor? Its selectable line monitoring allows it to monitor normally open or normally closed contacts.

How far away can the contact be from the module? According to the installation page, the cable length between the module and the end-of-line resistor must not exceed 10 metres.

Will the address setting be lost if power is interrupted? No. The address set using the rotary switches is retained.

At Narstek, we provide project support for the selection of Aritech 2000 series input/output modules, scenario programming and commissioning. Contact us to request a quote for the IU2050NC.