Supply of Trackside Acoustic/Optical Alarm and Associated Items for the Tactical Signal Controlled W

Descriptions

Network Rail (NR) has a requirement to develop and source a trackside acoustic/optical alarm device to work with the Tactical Signal Controlled Warning System (SCWS(T)) currently under development. The SCWS (T) is a simple low cost solution that interfaces with Solid State Interlockings (SSI) to provide a warning to track workers of approaching trains.The successful tenderer will be required to develop and produce two acoustic/optical alarm devices together with associated connecting cables to connect to the SCWS(T). The two preproduction devices will undergo site trials. On completion of site trails and NR product acceptance there is a requirement by the project for an initial production run of between 20-120 devices.Further production runs will be called off under a framework agreement as and when required by the business or by contractors working for NR on its infrastructure.The supplier will be required to help develop/refine this specification into a detailed specification. This will require attendance at a number of HAZOP/HAZID meetings and stakeholder workshops.Low cost and simplicity are key project goals for the SCWS (T) system and its constituent component parts. NR's draft requirements for the acoustic/optical alarm device are as follows:1. the acoustic/optical alarm device shall contain an acoustic sounder and an optical indication and be constructed to SIL1-2. This shall connect to a SCWS(T) product/device (to be provided by others) through a 24 volt power output and two separate volt free output contacts. The SCWS(T) shall pulse the acoustic and optical output contacts to indicate that the SCWS(T) product/device is healthy and initiate the acoustic and optical alarms in the event of an approaching train;2. as well as being powered from a 24 volt output from the SCWS(T) product/device, the acoustic/optical alarm device shall be able to be self-powered with batteries to last at least 10 hours continuous usage. The product must also have mains charging facility;3. The SCWS (T) will be mounted in a trackside equipment case. For the connection of the acoustic/optical alarm device to the SCWS (T) the requirement is that track workers do not have to open the equipment case. Therefore a permanent cable is required to run from SCWS (T) to an external connection interface box that the trackworkers will connect the acoustic/optical alarm device to. Such an interface will have suitable connectors to connect the SCWS (T) inside the equipment case, a cable and a connection interface box located externally to the equipment case. The requirement is to prototype two options:a. interface box attached to the equipment case (will require holes to be drilled in the case);b. interface box ground mounted close to the location case and the permanent cables fed via the existing equipment case cable route.The prototypes will be trialled and the most suitable solution will be adopted for volume manufacture with the supplier. The interface and connectors will be IP67 rated. Cable specification is below;4. each Acoustic/optical alarm device will be supplied with a cable with connectors compatible with the external interface connection and the Acoustic/optical alarm device. The connectors will be IP67 rated and the cable will be of a suitable specification for being laid out on the trackside environment without damage. For quotation purposes assume that the cable will be 25 m long;5. all cables and connectors/couplers used for all the connections from the SCWS (T) to the acoustic/optical alarm device should have sufficient cores for the acoustic control, optical control and 24 volt power supply. Assume at this stage 12 single cores and a 500mA load on each;6. the acoustic/optical alarm device shall comply with sections 5.18.1 Acoustic TWS Signal, 5.18.2 Optical TWS Signal and 5.23 Optical Colour of EN16704-2-1;7. the device must be capable of being carried and set up by one person. The device must be suitable for one person operation and suitable for carrying by one person up to one mile. The product must comply with Manual Handling Operations Regulations 1992;8. the acoustic/optical alarm device shall be self-supporting (no separate tripods) on typical trackside ground conditions (including uneven and canted ballast);9. the acoustic/optical alarm device shall be 3rd rail compatible with no significant areas of bare metal on the equipment;10. NR to retain all Intellectual Property Rights (IPR) of the developed acoustic/optical alarm device;11. the product must be built to IP67 as detailed in the latest version of EN 60529;12. the product must be built in compliance to the latest version of EN 50125, and EMC Standard EN 50121-4.