Allen-Bradley 700-HC24Z24-4 Bulletin 700-HC 4PDT Miniature Ice Cube Relay

Product Description

The 700-HC24Z24-4 is a high-reliability miniature "ice cube" relay engineered for versatile general-purpose switching within industrial control circuits. As part of the Allen-Bradley Bulletin 700-HC series, this 4-pole device utilizes a square base design with rugged blade-style terminals, ensuring high contact integrity and easy installation into compatible sockets. The unit features an integrated LED status indicator and a mechanical on/off flag to provide technicians with immediate visual confirmation of the coil's operational state.

Technical Specifications

• Brand: Allen-Bradley (Rockwell Automation)

• Model Number: 700-HC24Z24-4

• Relay Type: Miniature (Ice Cube) General Purpose

• Contact Configuration: 4-Pole Double Throw (4PDT)

• Contact Current Rating: 7 Amps

• Coil Voltage: 24V DC (Note: DC coils operate without frequency variables; 50/60Hz is not applicable to DC control)

• Base Style: Square Base

• Termination: Plug-in Blade Style

• Visual Diagnostics: Integrated LED and Mechanical Indicator

• Approximate Weight: 0.32 lbs (0.15 kg)

Application and Integration

This relay is specifically optimized for high-density panel layouts where multi-circuit switching is required. The 4PDT configuration allows for the simultaneous control of four independent load circuits or signal paths. It is commonly deployed in PLC output isolation, interposing applications, and logic control sequences. To ensure optimal performance, it should be paired with the appropriate Allen-Bradley 14-pin square base socket.

Engineering FAQ

How does the LED option assist in field troubleshooting?The LED in the 700-HC24Z24-4 is wired in parallel with the coil. If the LED is illuminated, it confirms that control power is reaching the relay terminals, helping engineers quickly distinguish between a control logic issue and a mechanical contact failure.

Can this relay handle AC coil voltages?No, this specific model is designed for a 24V DC control source. Applying AC voltage to a DC coil will lead to erratic operation (chattering) and eventual coil burnout. For AC applications, a different 700-HC variant must be selected.