Nittan Conventional Diode Base
£1.76 (inc VAT: £2.11)
Summary
The Nittan UB-4SD is a conventional Schottky diode detector base designed for indoor mounting applications within fire alarm systems. This reliable base provides a secure mounting platform for compatible fire detectors whilst incorporating Schottky diode technology for enhanced electrical performance and circuit protection.
Certified to EN54-5 and EN54-7 standards, the UB-4SD offers robust construction in ABS material with a compact 104.5mm diameter profile. The base features conventional termination with dedicated connections for power in/out, remote indicator lamp (RIL) support at 2mA, and cable screen earthing, making it suitable for a wide range of conventional fire detection installations.
With its wide operating voltage range of 10-32Vdc and temperature tolerance from -10°C to +55°C, the UB-4SD delivers dependable performance in various environmental conditions. The base meets EMC conformance to BSEN50130-4 and carries CE conformity, ensuring compliance with European safety and electromagnetic compatibility standards.
Features
- Conventional Schottky diode detector base for indoor mounting
- Compatible with Nittan Evolution detector range
- Wide operating voltage range from 10 to 32 Vdc
- Dedicated remote indicator lamp connection with 2mA support
- Five-terminal conventional wiring configuration
- Separate cable screen connection for improved EMC performance
- Compact 104.5mm diameter design with 15mm height
- Lightweight construction at only 52g
- Durable ABS material construction
- Operating temperature range from -10°C to +55°C
- Storage temperature tolerance from -25°C to +70°C
- Suitable for environments up to 95% relative humidity (non-condensing)
- EMC conformance to BSEN50130-4 standards
- CE conformity certified
- Complies with EN54-5 and EN54-7 fire detection standards
FAQs
What is a Schottky diode base and why is it used?
A Schottky diode base incorporates Schottky barrier diodes that provide fast switching characteristics and low forward voltage drop. This technology offers improved circuit protection, reduced power consumption, and enhanced reliability in fire detection systems. The diodes help isolate individual detector circuits and prevent false alarms caused by electrical interference.
What detectors are compatible with the UB-4SD base?
The UB-4SD is designed for use with Nittan Evolution conventional fire detectors. It provides a standard mounting platform with conventional termination suitable for smoke detectors, heat detectors, and multi-sensor detectors within the Evolution range. Always verify compatibility with your specific detector model before installation.
What is the RIL connection used for?
The RIL (Remote Indicator Lamp) connection allows you to connect a remote LED indicator that illuminates when the detector enters alarm. This is particularly useful for detectors mounted in concealed locations such as above suspended ceilings, allowing alarm indication to be visible at an accessible location. The base supports RIL current draw up to 2mA.
Can I use this base outdoors?
No, the UB-4SD is specified as an indoor mounting base only. It is not designed or certified for outdoor environmental conditions. For outdoor detector installations, you should use detector bases specifically rated for external use with appropriate weatherproofing and environmental protection.
What is the purpose of the separate screen terminal?
Terminal 4 provides a dedicated connection for cable screen earthing. This helps reduce electromagnetic interference (EMI) and improves system immunity to electrical noise, contributing to the base’s EMC conformance to BSEN50130-4. Proper screen connection is important for maintaining signal integrity in electrically noisy environments.
How do I wire the base in a conventional zone circuit?
The base uses a five-terminal layout: Terminal 1 is -VE in, Terminal 6 is -VE out, Terminal 3 is +VE in/out (common positive), Terminal 5 is RIL -VE for remote indicator lamp connection, and Terminal 4 is for cable screen. Wire the zone circuit in through terminals 1 and 3, and out through terminals 6 and 3 to continue the loop to the next device.
What standards does the UB-4SD comply with?
The UB-4SD complies with EN54-5 (specification for heat detectors) and EN54-7 (specification for point smoke detectors) which are European standards for fire detection and fire alarm systems. It also meets EMC conformance to BSEN50130-4 and carries CE conformity marking.
What is the maximum operating voltage for this base?
The UB-4SD operates within a voltage range of 10 to 32 Vdc. This wide operating range makes it compatible with most conventional fire alarm control panels which typically operate at 24Vdc nominal voltage.
Specifications
- Part Number: UB-4SD (F03-83510)
- Description: Conventional Schottky Diode Detector Base
- Device Type: Indoor mounting base
- Operating Voltage: 10 to 32 Vdc
- Operating Temperature: -10°C to +55°C
- Storage Temperature: -25°C to +70°C
- Relative Humidity: ≤ RH95% non-condensing
- Material: ABS
- Dimensions: ∅104.50mm x 15.00mm
- Mass: 52g
- Terminal Configuration: 5 terminals (1=-VE in, 6=-VE out, 3=+VE in/out, 5=RIL -VE 2mA, 4=Screen)
- RIL Current: 2mA
- EMC Conformance: BSEN50130-4
- CE Conformity: Yes
- Standards / Certification: Complies with EN54-5, EN54-7
Downloads
- Datasheet (Adobe PDF)
