EMERSON EC3-X33

EMERSON EC3-X33 Product Details

The EMERSON EC3-X33 is a stand-alone universal superheat controller designed for refrigeration, air conditioning, and industrial applications. It is specifically used in conjunction with EMERSON stepper motor-driven Electrical Control Valves (EX4 to EX8). The EC3-X33 provides precise superheat control, which optimizes system efficiency and protects the compressor.

Product Parameters

Here are the key technical specifications of the EMERSON EC3-X33:

Power Supply:

• 24 VAC ±10%; 50/60 Hz; 1 A

• Power consumption: 25 VA max. (including EX4 to EX8)

Connections:

• Plug-in connector: Removable screw terminals, wire size 12-20 AWG

• Grounding: 1/4 inch spade earth connector

• Connection to ECD-002: ECC-Nxx or CAT5 cable with RJ45 connectors

Inputs:

• Digital Input: 0/24 VAC/DC for stop/start function

• NTC Input: Emerson temperature sensor ECN-N60

• Analog Input: 4-20 mA (Emerson PT4-07M / PT4-18M / PT4-30M)

Outputs:

• Analog Output: 4-20 mA (for connection to any 3rd party controller with 12/24 VDC power supply)

• Alarm Relay: SPDT contacts 24 V AC/DC, 2 Amp inductive load (Activated during normal operation, deactivated during alarm or power off)

• Stepper Motor Output: Maximum current 0.8 A with nominal 24 VDC (for EX4 to EX8)

Other:

• Protection Class: IP20

• Operating Temperature: 0 to +60 °C

• Storage Temperature: -20 to +65 °C

• Humidity: 0 to 80% RH, non-condensing

Product Advantages

The EMERSON EC3-X33 offers several benefits:

• Precise Superheat Control: Ensures optimal evaporator performance and prevents compressor damage due to liquid return.

• Evaporating Pressure Limitation (MOP): Protects the compressor by limiting the maximum evaporating pressure.

• Low Superheat Alarm: Provides early warning of potential issues that could lead to compressor damage.

• 4-20 mA Signal Feed-Through: Allows the evaporator pressure sensor signal to be used by a third-party controller, potentially eliminating the need for an additional sensor.

• Sensor Monitoring: Detects sensor and wiring failures, ensuring reliable operation and flagging potential issues.

• Intelligent Alarm Management: Protects the compressor through fail-safe operation in case of alarms.

Precautions

• Ensure proper installation in a suitable control panel.

• Verify that the input voltage matches the specifications of the power supply.

• Do not exceed the specified current and power output ratings.

• Maintain the operating temperature within the specified range.

• Follow standard safety procedures when working with electrical equipment.

• Refer to the Emerson DeltaV system documentation for detailed installation and safety guidelines.

• Some sources indicate that this product may be discontinued by the manufacturer; verify availability and warranty terms with the supplier.