Product Filter
D-LX 201/721
Optical compact flame monitor
Flexible and selective compact flame monitor for high requirements. For optical monitoring of all fuel flames, including in complex multi-burner plants.
Functionality: Optical flame monitoring
Features
- Very wide temperature range: Deployable without change, certified and without the need for accessories for insulation, heating or cooling
- Wide dynamic range: Automatic gain adjustment to the brightness of the flame
- Consistently dual-channel: Highest safety combined with high availability
- Ideal support for Functional Safety: Safety chains in high demand mode or low demand mode up to SIL 3
- Extensive certifications
- Local display: Operational status, settings and flame intensity visible at a single glance for the entire temperature range for all variants
- Real-time flame stability information: Optional continuous qualification of flame stability during operation
- D-LX 201 InformationCentre for logging of the flame signal and parameters as an ideal supplement for commissioning up to six flame monitors simultaneously
D-LX 721 for application with flexible fibre optic system D-LL 703 / rigid fibre optic system D-LL 704
Benefits
- Safe process control: Even during strong and fast load changes of the combustion plant the process can be controlled safely by the flame stability signal. Reactions in due time are possible
- Increased load and fuel flexibility: Excellent selective monitoring and information about stability allow operation of the plant in less stable regimes
- Protection against unscheduled shutdown of the burner: Burner-specific information on stability allows decisions to be made on preventive maintenance of the burner
- Fulfillment of special requirements: Flexible presettings for different combustion situations and fuels
- Same technology for different applications: The same product family can be used for plants in the most varied regions and on the basis of a wide range of systems of standards
Applications
- Complex combustion plants including plants with many burners and different fuels
- Monitoring of burner flames with widely varying fuels
- Combustion processes with high Functional Safety requirements
- Combustion processes in continuous operation
Technical Data
- Technical data
- Explosion protection
| Spectral sensitivity | UV, IR |
|---|---|
| Operating mode | Intermittent operation and continuous operation |
| Functional Safety | Self-monitoring and fail-safe, supports safety chains up to SIL 3 (high demand mode / low demand mode) |
| Switching threshold | Flame intensity and flicker frequency |
| Local display | LEDs – always visible at a single glance for all versions, display of flame intensity by flash frequency |
| Flame failure detection time (FFDT) | 1, 2, 3, 5 s (separately adjustable for each range) |
| Flame ON/OFF contact | 1x NO contact |
| Ready for operation contact | 1x NO contact |
| Switching capacity of relay contacts | Max. 24 VDC, 0.5 A |
| Analogue output | 0/4 … 20 mA (adjustable), output signal selectable, load max. 750 Ohm |
| Opening angle | 6° (D-LX 201) |
| Real-time information | Flame stability analysis (optional) |
| Electrical data | 24 VDC, 5 W, PELV |
| Ambient conditions | -40 … +85 °C |
| Degree of protection | IP66/IP68, NEMA 4XIP65, NEMA 4X (/MP3)IP66, NEMA 4X (Ex variants) |
| Connections | D-LX 201: Sight tube G 1¼″ or NPT 1¼″, FPurge air G ½″ or NPT ½″, F |
| Dimensions | Housing P2: 80 x 80 x 250 mm Housing M5: 100 x 100 x 260 mm Housing M4: Ø 120 mm, length approx. 310 mm |
| Weight | Housing (without cable):P2: approx. 0.9 kg M5: approx. 1.2 kg M4: approx. 2.8 kg |
| D-LX 201/721 ../M4/84Ex | ll 2G Ex db llC T6 or T5 Gbll 2D Ex tb lllC T85 °C or T100 °C Db |
|---|---|
| D-LX 201/721 ../M4/85Ex | Cl. l, Div. 1, Gr. A, B, C, D T6/T5Cl. ll, Div. 1, Gr. E, F, G T6/T5; Cl. Ill |
| D-LX 201/721 ../M5/86Ex | Cl. l, Div. 2, Gr. A, B, C, D T6/T4Cl. ll, Div. 2, Gr. E, F, G T6/T4; Cl. lll |
| D-LX 201/721 ../M5/87Ex | ll 3G Ex nA nC llC T6 or T4 Gcll 3D Ex tc lllC T85 °C or T135 °C Dc |
USP
- Real-time analysis of flame stability
Accessories
- Mandatory
- Recommended
- Optional
| D-LL 7xx (for D-LX 721) |
| D-ZS 033-I - Swivel mount for the alignment of the flame monitor |
| D-ZS 117-I - Thermal isolator with electrical insulation |
| D-ZS 133-I - Ball valve for closing the sighting tube |
| Power supply 24 V - Wide range power supply unit for supply of several D‑LX 201 |
| D-NG 24/05 |
| D-ZS 113 set - Set of orifice plates for insertion in purge air flange |
| D-ZS 118 - Optical adjustment aid for the alignment of the swivel mount on the sighting tube |
| D-ZS 140-12 - Terminal box for connecting the flame monitor |
| D-ZS 141-12 - Terminal box for connecting the flame monitor |
| D-LX 200 test set - For software supported tests of the compact flame monitors D-LX 200/720 and D-LX 201/721 |
Downloads
Declarations of Conformity
- Declaration EU D-LX 201 xxx-Cx/0000 and D-LX 721 xxx-Cx/0000 / DE-EN
- Declaration EU D-LX 201 xxx-Cx/84Ex and D-LX 721 xxx-Cx/84Ex / DE-EN
- Declaration EU D-LX 201 xxx-Cx/87Ex and D-LX 721 xxx-Cx/87Ex / DE-EN
- Declaration UK D-LX 201 xxx-Cx/xx/0000 und D-LX 721 xxx-Cx/xx/0000 / EN
- Declaration UK D-LX 201 xxx-Cx/xx/84Ex and D-LX 721 xxx-Cx/xx/84Ex / EN
- Declaration UK D-LX 201 xxx-Cx/xx/87Ex and D-LX 721 xxx-Cx/xx/87Ex / EN