ECD2: Dual-channel digital PID controller with universal inputs

Dual-channel digital PID controller with universal inputs ECD2

ELHARTECD2 dual-channel controller with universal inputs is designed for temperature measurement using resistance temperature detectors (RTDs) and thermocouples (TCs) according to GOST 6651-2009 and GOST R 8.585-2001. It also measures standard current and voltage signals. The ECD2 controller features two independent channels to perform ON/OFF (two-position), P, PI, or PID regulation of various process parameters.

Modifications Where to buy?

ECD2-SL-CR-RS

Design: size SL (48×96 mm)
Inputs: 2×universal
Outputs: 1×analog (C), 1×relay (R)
Communication interface: RS-485 (ModBus)

ECD2-SL-CC-RS

Design: size SL (48×96 mm)
Inputs: 2×universal
Outputs: 2×analog (C)
Communication interface: RS-485 (ModBus)

ECD2-SL-TT-RS

Design: size SL (48×96 mm)
Inputs: 2×universal
Outputs: 2×pulse (T)
Communication interface: RS-485 (ModBus)

ECD2-SL-TR-RS

Design: size SL (48×96 mm)
Inputs: 2×universal
Outputs: 1×pulse (T), 1×relay (R)
Communication interface: RS-485 (ModBus)

ECD2-SL-RR-RS

Design: size SL (48×96 mm)
Inputs: 2×universal
Outputs: 2×relay (R)
Communication interface: RS-485 (ModBus)

ECD2-M-RR-RS

Design: size M (72×72 mm)
Inputs: 2×universal
Outputs: 2×relay (R)
Communication interface: RS-485 (ModBus)

ECD2-M-TR-RS

Design: size M (72×72 mm)
Inputs: 2×universal
Outputs: 1×pulse (T), 1×relay (R)
Communication interface: RS-485 (ModBus)

ECD2-M-TT-RS

Design: size M (72×72 mm)
Inputs: 2×universal
Outputs: 2×pulse (T)
Communication interface: RS-485 (ModBus)

ECD2-M-CC-RS

Design: size M (72×72 mm)
Inputs: 2×universal
Outputs: 2×analog (C)
Communication interface: RS-485 (ModBus)

ECD2-M-CR-RS

Design: size M (72×72 mm)
Inputs: 2×universal
Outputs: 1×analog (C), 1×relay (R)
Communication interface: RS-485 (ModBus)

ECD2-L-RR-RS

Design: size L (96×96 mm)
Inputs: 2×universal, 2×relay
Outputs: 2×relay (R), 1×alarm relay
Communication interface: RS-485 (ModBus)

ECD2-L-CR-RS

Design: size L (96×96 mm)
Inputs: 2×universal, 2×relay
Outputs: 1×analog (C), 1×relay (R), 1×alarm relay
Communication interface: RS-485 (ModBus)

ECD2-L-CC-RS

Design: size L (96×96 mm)
Inputs: 2×universal, 2×relay
Outputs: 2×analog (C), 1×alarm relay
Communication interface: RS-485 (ModBus)

ECD2-L-TT-RS

Design: size L (96×96 mm)
Inputs: 2×universal, 2×relay
Outputs: 2×pulse (T), 1×alarm relay
Communication interface: RS-485 (ModBus)

ECD2-L-TR-RS

Design: size L (96×96 mm)
Inputs: 2×universal, 2×relay
Outputs: 1×pulse (T), 1×relay (R), 1×alarm relay
Communication interface: RS-485 (ModBus)

Functional diagram of ECD2 dual-channel PID controller

Functional diagram of ELHART ECD2 PID controller
Features of ECD2 dual-channel PID controller
The new SL size modification expands the ECD2 series, offering several unique enhancements and benefits
- Horizontal panel-mount design (48×96 mm) provides an optimal ratio of display and button sizes to panel space.
- Software-selectable analog signal type (current or voltage) without external resistors.
- Large and bright 7-segment indicators in white and green colors.
- Pluggable terminal blocks for simple installation and replacement.
- Special conditions for OEM equipment manufacturers.
- Cost-effective solution per measurement and control channel.
General features

Quick start and stop of the controller.

PID controller with fuzzy logic elements.

Operational parameter blocks.

Universal inputs

Independent inputs supporting RTDs, TCs, current and voltage signals.

High speed: input polling time is 0.3 s per channel.

Sensor break control.

Measurement range limit function.

Scaling and filtering.

Digital signals processing.

Variable resistors support.

Remote setpoint.

Second setpoint.
Digital outputs: R type — EM relay, T type — SSR control

Output power limit.

Operating modes: ON/OFF, PID control, alarm, and 2 manual control modes.

ON/OFF delay.

Emergency state.

Control of solid-state relay groups (T type modifications).

Analog outputs: C type

Configurable output signal step.

Retransmission mode.

Active output.

Configurable output range.

Voltage output function.

Emergency output state.

Technical characteristics of ECD2 PID controller

Modifications	ECD2-SL	ECD2-M	ECD2-L
Overall dimensions (H×W×D)	48×96×114 mm	72×72×88.2 mm	96×96×88.2 mm
Number of measuring inputs	2
Measuring inputs (universal)	RTDs: Cu50, Cu100, Cu500, Cu1000, Pt100, Pt500, Pt1000, Ni100, Ni500, Ni1000 TCs: L, J, K, R, S, T, N, B, A-1, A-2, A-3 current: 0…5 mA, 0…20 mA, 4…20 mA voltage: -50…50 mV, 0…70 mV, 0…1 V Version 2.0 addition: voltage: 0…10 V variable resistor (VR): 500 Ω, 1 kΩ, 5 kΩ, 10 kΩ digital signal: "dry contact"
Number of digital inputs	-	-	2
Digital inputs	-	-	"dry contact", NPN
Basic error limit	RTD and analog signals: ±0.25% of span TC: ±0.25% of span (without cold junction temperature compensation) DAC: ±0.15% of span
Input polling time	one channel: 0.2 s all channels: 0.4 s	one channel: 0.3 s all channels: 0.6 s	one channel: 0.3 s all channels: 0.6 s
Built-in power supply	24 VDC, 40 mA
Control modes	ONON/OFF (two-position), PID, Manual control, Alarm, Retransmission mode Version 2.0 addition: PID-Fuzzy
Number of output devices	2	2	3
Output types	EM relay (5 A at 250 VAC, 3 A at 30 VDC, resistive load)
	pulse output: 24 VDC (max 40 mA) for SSR control
	DAC: 0/4…20 mA (max 700 Ω) DAC: 0/2…10 V (max 10 kΩ)	DAC 0/4…20 mA (max 850 Ω)	DAC 0/4…20 mA (max 850 Ω)
Communication interface	RS-485, Modbus-RTU protocol
Ingress Protection	IP54 (front panel) IP20 (housing)
Environmental conditions	Operating temperature: -20…+50 °С Storage temperature: -20…+50 °С Relative humidity: max 80% (without condensation)
Supply voltage	90…240 VAC / 50 Hz (Nominal: 220 VAC / 50 Hz)
Power consumption	3.3 W
Insulation category	CATII (double insulation)

Connection diagrams of ECD2 dual-channel PID controller

Connection diagram of ECD2-SL dual-channel PID controller

Connection diagram of ECD2-M dual-channel PID controller

Connection diagram of ECD2-L dual-channel PID controller
Overall dimensions of ECD2 dual-channel PID controller

Overall dimensions of ECD2-SL controller, mm

Overall dimensions of ECD2-M controller, mm

Overall dimensions of ECD2-L controller, mm

Dual-channel digital PID controller with universal inputs ECD2

Dual-channel digital PID controller with universal inputs ECD2

Modifications Where to buy?

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