Description
MAS PD5010-LCD
Technical Specifications: Display type: Segment LCD digital display Input signal types: 4…20mA analog current signal, digital serial input Power supply: 24 VDC Display resolution: Multi-digit numeric value display Alarm output: Relay alarm output contact Operating temperature range:-20℃ ~ +60℃ Storage temperature range:-40℃ ~ +85℃ Relative humidity:5% to 95%, non-condensing Mounting method: Cabinet door panel cutout mounting Front panel protection grade:IP65
Functional Features: Receive 4-20mA analog signal from process transmitters and convert signal to engineering unit value. LCD screen displays numeric measurement value and engineering unit. High and low alarm threshold configurable through front panel keys. Relay contact output activates external alarm light or buzzer when measurement exceeds threshold. Front membrane keys for parameter setup, zero and span calibration. Non-volatile memory retains configuration parameters after power loss. Front panel LED indicator for alarm state. Built-in signal filtering to stabilize display reading under signal fluctuation.
Application Scenarios: Control cabinet door process value indication, pressure monitoring display, temperature measurement readout, liquid level display, flow rate local indication, pumping station instrument panel, HVAC system value display.
Performance Parameters: Stable numeric display reading after signal filtering processing. Accurate signal conversion from 4-20mA current signal to engineering value. Non-volatile memory saves all setup parameters after power interruption. Reliable relay contact action when measurement crosses alarm threshold. Continuous stable operation inside industrial control cabinet.
Material Composition: Front panel: Polyester membrane with printed text and keys. Display assembly: Segment LCD module. Main PCB: Multi-layer FR4 glass fiber epoxy printed circuit board. Housing: Black flame retardant ABS plastic rear housing. Sealing gasket: Silicone rubber gasket for front panel IP65 sealing. Terminal block: PA66 flame retardant plastic screw terminals with tinned copper contacts.
Structural Features: Standard rectangular panel meter housing for cabinet door cutout installation. Front side includes membrane key area and segment LCD display window. Rear housing contains main circuit PCB, relay module and wiring terminal block. Silicone rubber gasket installed between front panel and cabinet door surface. Rear mounting clips fasten display unit into cabinet door cutout. Internal circuit separated into signal input conditioning zone, LCD driving zone and relay output zone.
Working Principle: PD5010-LCD receives 24VDC power supply from control cabinet power system. Analog 4-20mA signal from field transmitter enters signal conditioning circuit on PCB. Signal conditioning circuit filters and amplifies input signal, ADC converts analog current value to digital numeric value. Main microcontroller converts raw digital reading into engineering unit value according to configured zero and span parameters, then drives LCD screen to display numeric reading. Microcontroller continuously compares measured value with preset high/low alarm thresholds. When value exceeds threshold, relay circuit activates and closes alarm contact. All configuration parameters are saved to non-volatile memory.
Installation Requirements: Cut off 24VDC power before installation and wiring. Cut standard rectangular opening on control cabinet door and insert PD5010-LCD from front. Tighten rear mounting clips to fix display unit on cabinet door. Connect field transmitter signal wiring and 24VDC power wiring to rear terminal block. Enter parameter setup menu to configure signal range, engineering unit and alarm threshold. Calibrate zero point and full span according to transmitter range. Check silicone gasket installation to maintain IP65 front panel protection. Connect protective earth terminal to cabinet grounding bar.
Usage Notes: Use shielded twisted pair cable for 4-20mA analog input wiring. Check signal wiring polarity before power energization. Record all calibration parameters before modification. Do not apply current exceeding 20mA to analog input terminals. Do not operate unit outside rated temperature and humidity range. Inspect rear terminal screw tightness periodically. Avoid strong vibration on cabinet door where display is mounted.
