Finder 55.34.8.230.2040 – 55 Series Industrial relays

Why Choose the Finder 55.34.8.230.2040 Industrial Relay?

The Finder 55.34.8.230.2040 is a versatile 7 A, 230 V AC plug-in industrial relay designed for reliable electrical switching in industrial automation, machinery control and electrical control panels. Part of the Finder Series 55 miniature general-purpose relay range, it combines four independent changeover contacts with a compact, socket-mounted design for flexible multi-circuit control.

Featuring a four-pole double-throw (4PDT, 4 CO) contact configuration, the Finder 55.34.8.230.2040 enables four separate electrical circuits to be switched simultaneously using a single electromagnetic coil. Its 230 V AC nominal coil voltage is suitable for compatible 50/60 Hz control supplies, while its 7 A contacts rated at 250 V AC provide dependable switching for industrial applications within the specified load limits.

This variant features silver cadmium oxide (AgCdO) contacts, a lockable test button and a mechanical status indicator. The test button provides a convenient means of manually operating the relay during commissioning and maintenance, while the indicator allows visual confirmation of its mechanical state. Its plug-in construction is compatible with suitable Finder Series 94 relay sockets, making it an excellent choice for serviceable industrial control installations.

Key Advantages

• Four changeover contacts (4PDT, 4 CO) provide flexible switching of four independent electrical circuits.
• 230 V AC coil voltage supports compatible mains-voltage industrial control systems.
• 7 A rated contact current provides reliable general-purpose electrical switching.
• Silver cadmium oxide (AgCdO) contacts offer a robust contact system for industrial load switching.
• Lockable test button allows manual relay operation during testing, commissioning and maintenance.
• Mechanical status indicator provides visual feedback of relay operation.
• Plug-in socket mounting enables straightforward relay replacement without disturbing fixed wiring.
• Compatible with suitable Finder Series 94 sockets, including DIN rail mounting options.
• Monostable operation automatically returns the contacts to their normal positions when coil power is removed, unless the test button is mechanically locked.
• Compact construction helps conserve space within industrial control cabinets.

Key Features

• Finder Series 55 miniature general-purpose industrial relay.
• Type 55.34 with four changeover contacts.
• 230 V AC nominal coil voltage at 50/60 Hz.
• 4PDT (4 CO, 4 Form C) contact configuration.
• 7 A rated contact current.
• 250 V AC rated contact voltage.
• 250 V AC maximum switching voltage.
• 1,750 VA rated AC1 switching load.
• 17 kΩ nominal coil resistance.
• 1.5 VA nominal AC coil consumption.
• Silver cadmium oxide (AgCdO) contact material.
• Lockable manual test button for commissioning and functional checks.
• Mechanical indicator for visual confirmation of contact actuation.
• Monostable, non-latching electromagnetic operating mechanism.
• Plug-in terminals for compatible Finder Series 94 sockets.
• Suitable for industrial automation, electrical interlocking and multi-circuit control.

Four-Pole Switching with Convenient Manual Testing

Electromechanical relays such as the Finder Series 55 use an electromagnetic coil to operate mechanically linked electrical contacts. When the coil is energised, all four changeover contacts transfer from their normally closed positions to their normally open positions. When the coil supply is removed, the contacts return to their normal positions during standard operation. This enables one control signal to operate four separate circuits while maintaining galvanic isolation between the coil and contact circuits.

The Finder 55.34.8.230.2040 is particularly suitable for industrial control systems requiring multiple switching functions and convenient maintenance access. Its 4PDT contact arrangement supports auxiliary control, electrical interlocking, status signalling and equipment switching. The 230 V AC coil allows operation from a suitably rated AC control supply.

A distinguishing feature of the 2040 variant is its lockable test button and mechanical indicator. The test button allows maintenance engineers to actuate the relay manually when checking control circuits, while the mechanical indicator provides visual feedback. Because locking the test button can hold the contacts in their actuated position, manual operation should only be performed under appropriate safety procedures. The plug-in design also enables convenient removal and replacement using a compatible Finder Series 94 socket.

Typical Applications

• Industrial automation and process control systems.
• Electrical control panels and relay interface assemblies.
• PLC-controlled auxiliary switching circuits.
• Industrial machinery and OEM equipment.
• Building automation and building management systems.
• Electrical interlocking and multi-circuit control.
• HVAC equipment and ventilation control circuits.
• Control circuit testing, commissioning and maintenance.
• Electrical status signalling and auxiliary control.
• Maintenance-friendly plug-in relay installations.