FastConvert 4-Way Conventional Zone to CAST Addressable Zone Converter
- Facilitates the conversion and upgrade of a multi-zone conventional fire alarm system to an addressable CAST system utilising the conventional system’s pre-existing zonal wiring.
- Four individual zonal circuits accommodate CAST addressable devices on separate isolated circuits.
- Supplied as a 4 zone loop powered unit, extendable to 8 zones using a CA740PCB extender PCB (the extra PCB is housed in the same enclosure but is allocated a separate loop address by the CIE).
- Fully complies with the requirements of BS 5839-1 and eliminates the need to provide extra wiring to extend loops while maintaining loop and individual zone circuit integrity
- Ideal for use on retrofit sites such as nursing homes where conventional devices are being replaced in situ with addressable devices and the existing wiring needs to be retained.
- Maintains loop and individual zone circuit integrity.
- Plastic enclosure provides ample space to connect loop and zone cabling.
- No end-of-line devices, PSU or batteries required.
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More Information
‘CAST’ is the world’s most-advanced ‘distributed intelligence’ fire alarm system protocol. Conceived, designed and realised by C-TEC, it involved the creation of a powerful proprietary communication protocol (C-TEC Addressable System Technology, CAST) and multiple control panels & field devices. Its key features include:-
• 255 devices per loop.
• Autonomous decision-making for faster response times.
• Multiple type codes.
• 40V loop drive voltage.
• Two ‘soft’ addressing options – automatic via the panel or manual via a powerful handheld programmer.
• Powerful multi-level addressing facilitates easy device addition and swapped device identification.
• Multiple functionality at a single address (integrated devices) via our CAST-PRO devices.
• Volumes, tones & detector modes can be changed at compatible panels.
• High-speed data transmission and robust data transfer.
• Intrinsically EN54-13 compliant.
• Geographical location of short and open circuit faults (a short circuit isolator is included as standard in every CAST field device).
• Replace device function.
• Future seamless integration with other CAST life safety systems reducing energy, servicing, installation and repair costs.
• Designed and manufactured in the UK.
Technical Specifications
| Compatibility | Compatible with C-TEC's XFP/ZFP CAST Addressable Fire Panels., Compatible with CAST and CAST-PRO devices. |
|---|---|
| Application/operation | |
| Supply/operating voltage | |
| Quiescent current | |
| Indicators | Zones 1-4 & 5-8 Polling LEDs (Red), Zones 1-4 & 5-8 Isolator Open LEDs (Yellow) |
| Product dimensions (mm) | |
| Construction & finish | |
| IP Rating | |
| Weight | |
| Operating conditions/temperature | |
| Notes | Max cable length per zone <500m; Max. 20 CAST or CAST-PRO devices per zone., The CA740 takes a loop address and is assigned as a CAST I/O at programming. |
Documentation
| CA740 CAST 4 Way Conv Zone Convertor Datasheet – uncontrolled document | 2.79 MB | Download |
| CA740 CAST 4 Way Conv Zone Convertor Instructions – DFU0000740 | 846.91 KB | Download |
| EU Declaration of Conformity – CAST Conventional Zone Converter (DoC) | 106.47 KB | Download |
| UKCA Declaration of Conformity – CAST Conventional Zone Converter (DoC) | 107.27 KB | Download |
| FastConvert by C-TEC – FSM Magazine May 2026 | 2 MB | Download |










