Frequency/Tachometer/Line Speed Meter with Analog Retransmission and RS-485, 24 V Powered

Frequency/Tachometer/Line Speed Meter with Analog Retransmission and RS-485, 24 V Powered

SKU: ALT-080

5 digit tachometer / line speed / frequency meter with analog retransmission and RS-485. 24 VDC powered.

  • Manufacturer: DCBox
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1-4items$225.87/ each 
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  • $225.87
In stock(2 items available)

The DC5H/AM5H series are budget priced 5 digit panel meters which can be configured to operate as a tachometer, line speed meter or frequency meter. This model features 2 alarm relays, a 4 to 20 mA analog retransmission signal and a RS-485 Modbus connection.

The meter can be configured to show frequency, RPM or line speed (counting pulses from a line-following wheel or drum of configurable diameter). The unit comes with a large range of stickers for the front panel including RPM, M/min and kHz.

Line speed and RPM values can be measured using a wheel or drum sensor. The meter can be configured for sensors outputting 1 to 99,999 pulses per revolution. In line speed mode, the drum diameter can be set from 0.0001 to 9.9999 meters.

The analog output can be used to retransmit the displayed value. User-configurable high and low points allow the scaling to be changed. The polarity of the scaling can be switched for 20 to 4 mA output.

This unit has an RS-485 serial port and communicates via Modbus RTU. The displayed value can be monitored and all settings can be modified by writing to holding registers.

Manufacturer Part: AM5H-R-N2R-C-NAY or DC5H-R-N2R-C-NAY


  • 5 Digit Microprocessor Rate Meter
  • Line Speed / RPM / Frequency selectable
  • Configurable Pulse per Revolution setting
  • Configurable scaling setting
  • Configurable low pass filter for low frequency (≤100 Hz) signals
  • CE approval
  • High stability, non-flammable case(PC), high safety

Power supply: AC/DC 22~60V (AC/DC 100 to 240V optional)  

Power consumption: 8.5VA (all functions output) 

Accuracy: ±0.03% F.S. 

Display screen: High brightness red LED - 20.3mm (0.8") 

Display range: 0 to 99999 

Sampling time: 

  • 10 cycles / sec: >10Hz
  • f cycles / sec:

Analog output resolution: 15 bit

Output capability: 

  • Voltage output:
  • Current output:

Output response time:

Communication: RS-485 Modbus RTU mode 

Baud rate: 38400 / 19200 / 9600 / 4800 bps 

Polarity indication: Automatic with "-" indication 

Parameters setting: Push buttons 

Back up memory: EEPROM 

Temperature coefficient: 100ppm/°C (0 to 60 °C) 

Operating temperature: 0 to 60 °C 

Operating humidity: 20 to 90% RH (non-condensing) 

Storage temperature: -10 to 70 °C 

Storage humidity: 20 to 90% RH (non-condensing) 

Dimensions: 96 × 48 × 112 mm

Input signal:

The signal input for this meter can come from a range of NPN/PNP or dry contact sensors. An external excitation voltage is supplied at the back of the unit for sensor power. As shipped from the factory, the unit is configured for 12 VDC excitation supply and NPN or dry contact input. Internal jumpers can be moved to set 5 VDC excitation or PNP input type.

A separate jumper enables a low pass filter, useful for input frequencies less than 100 Hz. By default, the unit ships with the full 100 kHz input frequency range available.

Display units and modes:

The SCALE and PPR (Pulse per Revolution) settings allow the input frequency to be scaled to just about any units desired. The meter has some functions built in that make common scaling configurations easy.

The type setting applies fixed scaling appropriate for direct frequency display (no additional scaling), RPM display (scales pulses per second to pulses per minute) and line speed, which scales pulses accounting for the diameter of a pickup wheel or drum.

  • Frequency: Displays input frequency / PPR setting × SCALE setting
  • RPM: Displays input frequency × 60 / PPR setting × SCALE setting
  • Line speed: Displays input frequency × 60 × ? / PPR setting × SCALE setting

A second scaling setting is activated when in line speed mode. The drum or wheel diameter (set by the SCALE parameter) is configured in meters, but by setting the UNIT parameter, the display can be set to show line speed in meters/min, yard/min or feet/min.

    • SKU
    • Weight
      0.38 kg
    • Dimensions (L x W x H)
      18 x 12 x 7 cm

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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