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8-channel controller with data logging function ECD8 series

8-channel controller with data logging function ECD8 series

A cost-effective eight-channel controller ECD8 with data logging function, featuring universal inputs, is used in various industries, public utilities, and agriculture as part of automated control systems and is designed for:
   — Temperature measurement using thermocouples (TCs) according to GOST R 8.585-2001 and resistance temperature detectors (RTDs) according to GOST 6651-2009.
   — Measuring standard current (0/4…20 mA) and voltage (0…10 V) signals and scaling them to user-defined engineering units (°C, %, bar, m, kgf/cm², etc.).
   — ON/OFF (two-position) control or alarm signaling when monitored parameters exceed set limits.
   — Transmitting measured signals to a higher-level process control system via RS-485 interface using Modbus RTU protocol, as well as remote control of actuators via RS-485.
   — Data logging of measured values to a microSD card.

Modifications Where to buy?

The meter-regulator is an 8-channel ECD8-L-R-RS
ECD8-L-R-RS
  • Design: size L (96×96 mm)
  • Inputs: 8×universal
  • Outputs: 8×relay (R)
  • Communication interface: RS-485 (ModBus)
  • Functional diagram of the ELHART controller ECD8 series
    Functional diagram of the ECD8 controller
    Functional diagram of the ECD8 controller
  • Features of the ELHART controller ECD8 series
    • 8 universal inputs supporting the most common types of TCs, RTDs (including Pt1000), and standard current and voltage signals (including 0…10 V).
    • Calculation of difference and arithmetic mean between any measured values.
    • Flexible assignment of inputs to logical units. Each logical unit can operate with any measured or calculated value.
    • 8 logical units supporting ON/OFF (two-position) control, alarm, and manual control modes.
    • PWM support in all operating modes of logical units.
    • Switching outputs to a safe state in case of sensor signal loss or when the measured value exceeds allowable limits.
    • Ability to disable indication of individual channels.
    • RS-485 interface with Modbus RTU protocol for device configuration, reading measured values, and remote output control.
    • Built-in 24 VDC power supply allows connecting analog sensors without external power sources.
    • Data logging of measured values to an external microSD card up to 32 GB.
    • Compact panel-mount housing, size 96×96 mm, with a depth of only 88 mm.
    • Large high-contrast bright display with 20 mm character height for clear reading from a distance.
    • 3 lock levels for operator parameters and password protection for programmable parameters.
  • Technical characteristics of the 8-channel controller with data logging function ECD8
    Parameter Value
    Overall dimensions (W×H×D) 96×96×88.2 mm
    Number of measuring inputs 8
    Measuring inputs (universal) RTDs: Pt100, Pt1000
    TCs: L, J, K, S, B
    current: 0…20 mA, 4…20 mA
    voltage: 0…10 V
    Basic error limit RTDs and analog signals: ±0.25 % of span
    TCs: ±0.25 % of span (without cold junction temperature compensation)
    Input polling time 1 input: 0.3 s
    8 inputs: 1.2 s (parallel polling of two groups of 4 inputs)
    (disabling unused inputs increases polling speed)
    Built-in power supply 24 VDC, 160 mA
    Control modes ON/OFF (two-position), Alarm, Manual control
    Number of outputs 8
    Output types EM relay (5 A at 250 VAC, 3 A at 30 VDC, resistive load)
    Communication interface RS-485, Modbus RTU
    Ingress Protection IP54 (front panel)
    IP20 (terminal side)
    Environmental conditions Operating temperature: (-20...+50) °C
    Storage temperature: (-20...+50) °C
    Relative humidity: (0…80)% (without condensation)
    Supply voltage 90…240 VAC / 50 Hz (Nominal: 220 VAC / 50 Hz)
    Power consumption max 4.5 W
    Insulation category CATII (double insulation)
    Data logging External microSD card, max 32 GB
  • Connection diagram of the ECD8 controller
    Connection diagram of the ELHART 8-channel controller with data logging function ECD8
    Connection diagram of the ELHART 8-channel controller with data logging function ECD8
  • Overall dimensions of the ECD8 controller
    Overall dimensions of the ELHART controller ECD8 series, mm
    Overall dimensions of the ELHART controller ECD8 series, mm