PM439 Counter 3 1/2 DIGITAL PANEL METER
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1. Characteristic: 1) MCU chip inside 2) LED backlight display 3) Portable, accurate, reliable and easy to install 2. Specifications: Product Dimension: 79×43×22mm Display Dimension: 50.3×19mm Install Dimension: 76.5×39.2mm Display: LED Input Signal: impulse/switch Reset Mode: High reset Display range: 0000~9999 Count: Sum / Total Voltage Limit: 9V Power Supply: DC 5V Working Environment: 0 ~ 60℃/20 ~ 95RH 3. Notes: 1) Make sure you connect the external ports right, see picture: a. Connect J1 to 5V power supply b. Connect J2 to control keys, includes “C”, “+5V” and “R”. c. When connect to outside impulse, connect signal positive end to “+5V” port, negative end to “C” port. d. Put a switch between “R” and “+5V”, press the switch to reset. e. When connect to outside switch, put switch between “C” and “+5v”, “R” and “+5V” 2) Normal Power Supply is DC 5V. When the power supply is too high, you’d better not use the meter for long time.  The external connection graph |
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