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4-channel controller with data logging function ECD4

4-channel controller with data logging function ECD4

A cost-effective four-channel controller ECD4 with data logging function, featuring universal analog and digital 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 and digital input states to a microSD card.

Modifications Where to buy?

The meter-regulator is a 4-channel ECD4-L-R-RS
ECD4-L-R-RS
  • Design: size L (96×96 mm)
  • Inputs: 4×universal
  • Outputs: 4×relay (R)
  • Communication interface: RS-485 (ModBus)
The meter-regulator is a 4-channel ECD4-L-R-D-RS
ECD4-L-R-D-RS
  • Design: size L (96×96 mm)
  • Inputs: 4×universal, 4×digital (D)
  • Outputs: 4×relay (R)
  • Communication interface: RS-485 (ModBus)
  • Functional diagram of the ELHART 4-channel controller ECD4 series
    Functional diagram of the ECD4-L-R-RS controller
    Functional diagram of the ECD4-L-R-RS controller
    Functional diagram of the ECD4-L-R-D-RS controller
    Functional diagram of the ECD4-L-R-D-RS controller
  • Features of the ELHART controller ECD4 series
    • 4 universal inputs supporting the most common types of TCs, RTDs (including Pt1000), and standard current and voltage signals (including 0…10 V).
    • 4 digital inputs (optional) to perform start and stop of the logic, as well as output latch reset when the output latch function is enabled.
    • 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.
    • 4 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 and digital input states 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 4-channel meter controller with ECD4 archiving function
    Modifications ECD4-L-R-RS ECD4-L-R-D-RS
    Overall dimensions (W×H×D) 96×96×88.2 mm
    Number of measuring inputs 4
    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
    4 inputs: 1.2 s
    (disabling unused inputs increases polling speed)
    Number of digital inputs 4
    Digital signals "dry contact", PNP, NPN
    Built-in power supply 24 VDC, 160 mA
    Control modes ON/OFF (two-position), Alarm, Manual control
    Number of outputs 4
    Output types EM relay (5 A at 250 VAC, 3 A at 30 VDC, resistive load)
    Communication interface RS-485, Modbus-RTU protocol
    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 diagrams of the ECD4 controller
    Connection diagram of the ELHART ECD4-L-R-RS controller
    Connection diagram of the ELHART ECD4-L-R-RS controller
    Connection diagram of the ELHART ECD4-L-R-D-RS controller
    Connection diagram of the ELHART ECD4-L-R-D-RS controller
  • Overall dimensions of the ECD4 controller
    Overall dimensions of the ELHART 4-channel controller ECD4 series, mm
    Overall dimensions of the ELHART 4-channel controller ECD4 series, mm