| Overview |
The DSL DALI Analyser is a DALI interface which optionally connects to a PC or BMS via USB or RS485.
Unlike any other DALI interface, the DSL Analyser:
- Provides 3000 V isolation between the DALI bus and PC/BMS.
- Contains a 48 MHz processor 16-bit ADC capable of measuring and analysing the quality of the DALI baseband signal, not just a digitised form of the signal, providing a “virtual oscilloscope” in conjunction with a PC.
- Provides intelligent trigger outputs to trigger conventional oscilloscopes on specific patterns of DALI usage (when certain devices or command are used or when invalid waveforms occur).
- In combination with the provided PC software or your own software (full protocol provided), the DSL DALI Analyser can be used to control or pinpoint and resolve faults with DALI networks and devices.
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| Automated Commissioning Tool |
Tired of arriving to commission a DALI system to find that devices cannot be addressed, communicate unreliably, crash or short out the bus when certain commands are issued? System integrators often waste time and money solving issues beyond their conrol, caused by designers of DALI equipment and installers. The fail-safe nature of DALI (lights operate if the DALI bus is bad) means that it is difficult to verify that an installation has been done correctly before the BMS integrator begins work, and the end customer may sign-off a bad installation. Many jobs start on the wrong foot and cause friction with customers as an inadequate installation is debugged by the BMS engineers.
Excessively long or capacitative wiring, high-resistance junctions, daisy-chaining of devices, poor network design (topology and load balance of devices), and design and assembly errors by DALI device manufacturers are all common and undetectable until the BMS is commissioned.
DSL-Analyse is the solution. Connected to a DALI network, it comprehensively tests all aspects of the network without operator intervention and produces a simple report indicating all problems with power supplies, wiring and devices. The simple interface can be used by untrained operators, so an installer or end customer can use the DSL-Analyse as part of the sign-off.
The tests include:
- DALI Power Supply: Voltage, ripple, current limit, recovery time.
- Network wiring quality: Analysing the shorted voltage of the line identifies high-resistance connections in junction boxes, cable harnesses and device terminals.
- Network loading and capacitance: Udentifies networks which are overloaded in terms of current draw or capacitance due to poor allocation of devices to buses, or wiring. Devices are put into their highest-power mode (e.g. identification LEDs active) to check that the network does not collapse under these circumstances.
- Address conflict resolution: DALI devices which are unaddressed or share the same address are automatically resolved.
- Slave device receiver compliance: Sending marginal-quality DALI messages (all combinations of duty-cycle, baud rate) confirms that the DALI receivers in slave devices comply with the DALI specification.
- Slave device transmitter compliance: Message received from slaves are checked for compliance to DALI specification in terms of response time, bus shorting strength, duty cycle, baud rate, rise and fall times.
- Slave feature test: All DALI commands relevant to the devices on the network are tested for correctoperation.
- Soak test: Optionally, the DSL-Analyse can be left for any length of time to check for devices that may degrade or crash with time. Bad solder or terminal joints, and some firmware bugs, often show only after several hours of intensive use of the bus.
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