DEIF DLQW72-PC-PY

Technical Specifications

• Model Series: DEIF DLQW Marine Analog Indicator Series
• DIN Panel Cutout Size: 72 mm × 72 mm (Q72)
• Auxiliary Power Supply: 24 VDC marine standard shipboard power
• Signal Input Range: ±10 VDC analog process signal
• Backlight Dimming Control: 1 kΩ potentiometer universal dimming signal (PY variant dedicated circuit)
• Backlight Type: Long-life constant-color LED backlight
• Full-Scale Pointer Deflection Angle: 240° wide viewing angle
• Impact Resistance Rating: 50 g peak mechanical shock
• Operating Temperature Range: -25 °C ~ +70 °C
• Storage Temperature Range: -40 °C ~ +85 °C
• Relative Humidity Tolerance: 5%–95% non-condensing
• Front Panel Protection Class: IP66 when fully installed in marine switchboard
• Terminal Wire Compatible Gauge: 0.2 mm² ~ 2.5 mm² solid copper wire
• Overall Depth Behind Panel: 68 mm
• Net Weight: 380 g

Functional Features

1. Patent X-coil microprocessor drive technology for high linearity analog pointer movement
2. PY dedicated dimming circuit supports unified bridge console night light brightness adjustment via single 1 kΩ potentiometer
3. Independent pointer backlight and dial background light with consistent color spectrum across full dimming range
4. Full anti-static ESD protection circuit integrated on internal PCB
5. Customizable printed dial scales for rudder angle, RPM, pitch, torque marine measurement parameters
6. Screw-type rear terminal blocks compatible with solid wire and 26AWG flat ribbon marine cable
7. Marine type approval certified for cargo ships, passenger vessels and offshore platforms

Performance Parameters

• Measurement Accuracy Class: 0.5 high-precision marine grade
• Pointer Response Time: ≤ 200 ms full-scale deflection
• Backlight Service Life: 100,000 hours continuous operation
• ESD Surge Withstand: 2 kV contact discharge per IEC 61000-4-2
• Vibration Resistance: 5 Hz – 100 Hz, 2 g continuous marine hull vibration
• Dimming Adjustment Range: 0% – 100% uniform brightness without color shift

Material Composition

• Front Bezel: Black ABS flame-retardant plastic with UV anti-yellowing coating
• Dial Window: Tempered anti-reflection scratch-resistant polycarbonate glass
• Internal X-Coil Drive Core: Copper wound precision electromagnetic coil with silicon steel shielding
• Pointer Assembly: Lightweight aluminum alloy balance pointer with anti-vibration counterweight
• Rear Housing: Flame-retardant black ABS plastic with sealed silicone rubber front gasket
• Terminal Blocks: Nickel-plated brass anti-corrosion screw terminals for marine salt fog environment

Structural Characteristics

1. Standard Q72 square DIN panel mounting form factor with front spring locking clips for fast cabinet installation
2. Single-piece silicone rubber front sealing gasket to achieve IP66 front panel dust and water splash protection
3. Separated internal compartment layout for signal input circuit and backlight drive circuit to avoid light interference
4. Rear independent terminal block zones for power supply, measurement signal and dimming control wiring
5. Balanced anti-vibration pointer assembly with damping silicone pad to eliminate hull vibration pointer jitter
6. Compact rear depth design to save marine control cabinet internal wiring space

Working Principle

Advantage Highlights

1. 0.5 high-precision marine accuracy class meets international marine vessel instrumentation standards
2. PY universal dimming interface realizes centralized unified night light brightness control for bridge wing console
3. IP66 front panel protection withstands sea spray, dust and humid marine cabin environment
4. Anti-vibration balanced pointer eliminates reading jitter under ship hull continuous vibration
5. Long-life LED backlight reduces vessel maintenance replacement frequency
6. Full marine type approval certification compatible with all standard shipboard 24 VDC electrical systems

Applicable Industries

Installation Requirements

1. Install within standard Q72 72×72 mm DIN cutout on marine steel switchboard front panel; fasten front spring clips to lock meter body rigidly
2. Mount silicone rubber sealing gasket between meter bezel and cabinet panel to maintain IP66 front protection rating
3. Separate signal wiring from high-power motor and inverter power cables inside cabinet with minimum 15 cm separation
4. Connect cabinet PE ground terminal to meter rear ground screw to suppress marine salt fog induced static charge
5. Use double-shielded marine signal cable for measurement and dimming wiring; single-point shielding grounding at cabinet PE bar
6. Maintain cabinet internal operating temperature within -25 °C ~ +70 °C; avoid direct solar radiation on meter front panel

Operation & Maintenance Precautions

1. Wipe front polycarbonate window with soft microfiber cloth only; forbid abrasive cleaning agents to prevent scratch damage
2. Conduct annual inspection of rear terminal screw tightness to avoid loose contact caused by hull vibration
3. Do not install adjacent to high-current contactors and ship power distribution transformers to prevent electromagnetic pointer drift
4. Avoid exposure to direct sea water splash; install additional rain shield for exterior bridge wing panels
5. Store spare meters in moisture-proof sealed packaging with anti-salt-fog desiccant packs
6. Cut off 24 VDC shipboard auxiliary power supply before disassembling rear wiring terminals