Modbus Pulse Counters with Persistant Memory

Available for backorder
  • Weight
    0.04 kg
  • SKU
    KTA-399

The KTA-399 is a 3 Channels counter module with non-volatile memory. Counts at up to 1kHz with 32-bit counting registers. Outputs Modbus RTU over RS-485.

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The KTA-399 is a Modbus Slave that provides 3 isolated Digital Counter inputs. Reading and configuration can be done over Modbus RTU. It can be mounted on DIN 32mm rails. 

The memory is stored internally using a new technology known as Ferromagnetic RAM. Compared to traditional EEPROM, FRAM can be written and read millions of times without wearing out and failing. The memory space is arranged as Modbus Holding Registers, allowing easy reading and writing from any industrial controller, SCADA System, etc. Data is retained in memory without power for up to 95 years (at 55°C).

Each Digital Input Counter has 32-bit capacity and maximum counting frequency of 1000Hz for signals with square wave and working cycles of 50%. They accept input voltage from 5-28Vdc. The Counter’s counting values and functions are stored in Modbus Holding Registers. These Registers’ Address can be dynamically changed or entirely disabled. 

The Inputs are electrically isolated from the serial interface and the module power supply. There is no electrical isolation between the serial interface and the module power supply. There is also no isolation between the inputs.

  • Power Supply: 8-28 VDC
  • Current Consumption: 30mA (typical), 100mA (max)
  • Operating Temperature: -20 to 80°C
  • Protocol: Modbus RTU salve on RS-485
  • 3 x Inputs: Opto-isolated pulse input, 5 to 28VDC
  • Maximum Count Frequency: 1kHz for signals with square wave and working cycle of 50%
  • Counting Capacity: 32 bits (0 to 4,294,967,295)
  • Retain data without power for up to 95 years
  • 1 000 000 000 000 (1012) read/write cycles
  • 64 kilobytes of memory space
  • DIN Rail mount
  • Dimensions: 100L x 13W x 54H (mm)

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

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