HONEYWELL GR-4C-AC230V

Description

Product Description

The HONEYWELL GR-4C-AC230V is a general-purpose electromechanical control relay from Honeywell’s comprehensive portfolio of industrial switching components. Designed as a reliable and cost-effective workhorse, this relay features a four-pole changeover (4 Form C) contact configuration, allowing it to switch up to four independent circuits simultaneously or provide a combination of normally open and normally closed contacts per pole. The coil of the **HONEYWELL GR-4C-AC230V is rated for 230 Volts Alternating Current (AC), making it directly compatible with common single-phase control voltages used in industrial panels across many regions. This relay is commonly utilized to isolate control signals, multiply output contacts from a PLC, or interface low-current PLC outputs with higher-power loads like contactors, solenoids, and indicator lamps. For engineers requiring a versatile and proven interface solution, the HONEYWELL GR-4C-AC230V offers dependable performance. Its straightforward design makes the HONEYWELL GR-4C-AC230V a staple component in control system design for logic expansion and load isolation.

Product Parameters

• Product Type: Electromechanical Plug-in Relay.
• Contact Configuration: 4 Form C (4 PDT – Four Pole Double Throw). Each pole provides one normally open (NO) and one normally closed (NC) contact.
• Coil Voltage: 230V AC, 50/60 Hz.
• Contact Rating: Typically rated for switching resistive and inductive loads, with specific current ratings (e.g., 10A at 250V AC) detailed in the official datasheet.
• Mounting: Designed for mounting on a standard DIN rail (35mm) or panel via a socket/base.
• Socket Compatibility: Requires a compatible 11 or 14-pin socket (e.g., Honeywell SX-SOCKET series) for easy installation and replacement.
• Termination: Screw terminals on the socket/base for secure wire connection.
• Indication: Often features a mechanical flag or transparent cover with a visual indicator to show the relay’s energized state.
• Standards Compliance: Conforms to relevant international standards for industrial control equipment.

Advantages and Features

• High Contact Capacity: The four changeover contacts provide exceptional switching flexibility in a single unit, reducing the number of components needed for multi-circuit control.
• Robust & Proven Technology: Electromechanical design offers high tolerance to voltage transients and surge currents, providing reliable service in electrically noisy industrial environments.
• Clear Visual Status: Built-in mechanical flag or LED indicator (depending on model variant) allows for instant visual confirmation of the relay’s operating state, aiding in troubleshooting.
• Easy Maintenance: Plug-in design onto a socket allows for quick and easy replacement without rewiring, minimizing system downtime during maintenance.
• Wide Load Compatibility: Suitable for switching a broad range of AC and DC loads, including motors, heaters, and lighting, within its specified ratings.

Application Cases in Application Fields

• PLC Output Expansion: Used in a control panel to multiply the four outputs from a compact PLC module into sixteen separate control circuits for activating multiple pilot lights, small solenoids, or alarm horns.
• Contactor Coil Control: Acting as an intermediary between a 24V DC PLC output card and the 230V AC coil of a large motor contactor, providing both voltage isolation and current amplification.
• Conveyor System Interlocking: Employed in a material handling system to create complex interlock logic where the state of one conveyor (running/stopped) must control the start/stop commands of several others via multiple contact sets.
• HVAC Control Panel: Switching different stages of heating elements or fan speeds in an air handling unit based on signals from a thermostat or building management system controller.

Comparisons with Competing Products

Competing products include similar general-purpose relays from manufacturers like Omron (MY4N series), Siemens (3TH series), and Schneider Electric (RXM). The HONEYWELL GR-4C-AC230V competes directly in terms of functionality, form factor, and price. A key differentiator is often brand preference within an existing ecosystem or specific agency approvals. Compared to solid-state relays (SSRs), the HONEYWELL GR-4C-AC230V has a lower upfront cost and can handle a wider range of load types (AC/DC) but has a shorter mechanical life, generates electrical noise during switching, and has a slower response time. The choice hinges on the application’s need for fast, silent switching (favoring SSRs) versus cost-effectiveness and robust surge tolerance (favoring electromechanical). For standard-duty industrial interface applications, the **HONEYWELL GR-4C-AC230V remains a highly competitive and reliable option.

Selection Suggestions and Precautions

1. Load Verification: Critically review the datasheet for the exact contact current and voltage ratings (resistive and inductive) at your specific supply voltage. Never exceed these ratings.
2. Inrush Current: For loads with high inrush currents (like contactor coils, solenoid valves, or lamps), ensure the relay’s make-and-break capacity is sufficient. Derating or using an SSR may be necessary for demanding loads.
3. Socket Selection: Remember to order the compatible DIN-rail socket separately. Verify the socket’s terminal type (screw, cage clamp) and pin count (e.g., 14-pin) matches the relay.
4. Arc Suppression: When switching inductive AC loads, consider installing a Metal-Oxide Varistor (MOV) or RC snubber network across the contacts to suppress electrical arcing and extend contact life.
5. Mechanical Life Expectancy: For applications requiring extremely high cycle counts (tens of millions), an electromechanical relay like the HONEYWELL GR-4C-AC230V may not be suitable; a solid-state relay should be evaluated instead. Always consult the official Honeywell datasheet for life expectancy curves.

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