Digital hour meter with LCD display 230VAC

Operating time counter DHM-DIN - DIN rail mounting

Product description

The DHM-DIN operating time counter is designed to measure the operating time of devices powered from a 230 VAC network. It counts the total time the device is under voltage - suitable for machines, pumps, fans, compressors, production lines, and generally all devices requiring cumulative operating time registration.

When 230 V AC voltage is applied, the device automatically starts counting time. Values are displayed on two indicators and stored in memory even during power outages.

Technical data

• Power supply voltage: 230 VAC (150-260 VAC), 50/60 Hz.

• Power consumption: < 6 VA

• Counting time range: up to 99,999 hours

• Display: Indicator:

  • 2× 3-digit display (number height 9.2 mm).

  • Mode indicator:

    • HHH (hours) / MM (minutes) / S (seconds)

    • After exceeding 999 hours → the lower display shows hours and minutes (see detailed description below).

• Installation: MCB (circuit breaker) profile, DIN rail mounting

• Reset: RESET button (for DHM-DIN, press with a non-conductive tool through the RESET hole).

• Dimensions: 35.4 × 60 × 90 mm

Usage and operating principle

1. Connection according to the diagram - after powering on, the counter automatically starts counting time from zero.

2. Indicator mode on new power-up:

   • Top screen: HHH - three hour digits.

   • Bottom screen: MM S - two minutes + one seconds digit.

     • seconds increase by 1 every 6 seconds

3. After exceeding 999 hours:

   • The meaning of the indicators changes:

     • Bottom screen → clock

     • bottom screen right number → minutes (increases by 1 every 6 minutes)

4. Power outage memory:

   • When the power supply is turned off, the device retains the last measured value.

   • Upon power restoration, the device continues counting from the saved value

Resetting the counter

• DHM-48: Press the RESET button within 5 seconds.

• DHM-DIN: press the hidden RESET button with a non-conductive tool (e.g., insulated screwdriver).

• After reset, all numbers are set to 000000.

Typical use

The counter is used for long-term monitoring of equipment directly connected to the power supply:

• submersible pumps

• domestic water supply / precious water supply

• self-priming pumps

• rotating machines

• compressors

• exhaust fans (carpentry, industrial)

• production machines and lines

• any equipment for which total operating time needs to be recorded

Suitable for maintenance intervals, maintenance planning, machine usage monitoring, and equipment lifespan registration.