Schneider Electric RXM4AB2P7 Harmony RXM Relay 4 C/O 230 V AC

RXM4AB2P7 Harmony RXM miniature relay: what it is and how the code reads

The RXM4AB2P7 is a Schneider Electric product described in the datasheet as: miniature plug in relay, Harmony Electromechanical Relays, 6A, 4CO, with LED, lockable test but to n, 230V AC. The RXM4AB2P7 is a miniature plug-in relay of the Harmony RXM series with four changeover contacts, a 230 V AC coil, an LED indicator and a lockable test button. Seven Star LLC supplies the RXM4AB2P7 in Oman and the GCC as an independent supplier based in Muscat.

Decoding the reference: RXM is the Harmony miniature relay series, 4 stands for four changeover (C/O) contacts, AB is the version with LED and lockable test button, and 2P7 identifies the 230 V AC 50/60 Hz coil (datasheet: 230 V AC 50/60 Hz). Neighbouring references such as RXM2AB2P7 carry two contacts with the same coil voltage.

Technical specifications of the RXM4AB2P7

How the RXM4AB2P7 switches its four contacts

When the coil is energised the armature moves all four contact sets together, so four independent circuits change state at once. The datasheet lists the contact composition as 4 C/O, a switching capacity up to 1500 VA/168 W and a minimum switching capacity of 170 mW 10 mA, 17 V, so it suits both power-level and small-signal switching.

Operating time is 20 ms and the electrical durability is stated as 100000 cycles resistive. The LED shows coil energisation and the lockable test button lets an engineer force the contacts for checks without applying coil voltage.

Where the RXM4AB2P7 fits in a control panel

The RXM4AB2P7 plugs into a separate socket, which carries the wiring and holds the relay by a retaining clip. The socket is a separate order item and must match the relay pin shape; the datasheet lists Flat (faston type). Relays in the series are common interposing devices between PLC outputs and heavier loads such as contactor coils and solenoid valves.

Siblings include RXM2AB2P7 (two contacts) and other coil voltages in the same series. They share the same footprint, so a relay can be exchanged for another variant of the same series on an existing socket as long as the coil voltage and contact rating suit the application.

Selection and ordering checklist for the RXM4AB2P7

• Coil voltage: 230 V AC 50/60 Hz; verify AC or DC and frequency.
• Contact rating: 6 A 250 V AC; 6 A 28 V DC per the datasheet, and minimum load for dry-circuit use.
• Number of contacts: four changeover.
• Socket, retaining clip and any marker or surge suppressor options as separate items.
• Ambient temperature: the datasheet gives -40 to 55 °C.
• Duty: very frequent switching shortens life; consider solid-state outputs.

Installation, commissioning and maintenance of the RXM4AB2P7

Plug the relay into its socket, wire the coil and contact circuits to the socket terminals, and fit the retaining clip. The relay weighs 0.037 kg and may be mounted in any position as stated. Keep coil wiring separate from sensitive signal wiring, and use a surge suppressor on DC coils or where long coil cables are used.

Maintenance is by exchange: the relay is a plug-in wear item with a defined electrical life. Use the test button to verify downstream circuits and keep spare relays of the same coil voltage on site. Inspect for contact discolouration and socket heating at routine rounds.

Typical applications of the RXM4AB2P7 in Oman and the GCC

The relay is used in control panels for pumps, fans, valves, alarm and interlock circuits in oil and gas, water and wastewater, desalination and building plants across Oman and the GCC, typically as an interposing relay between a PLC and field devices.

Information to send with an RFQ for the RXM4AB2P7

• Full reference RXM4AB2P7 and quantity
• Coil voltage and frequency
• Load voltage and current
• Socket type and accessories
• Delivery location and timing

Site conditions in Oman for the RXM4AB2P7

Control cabinets in Gulf plants often run hot, because many sit in outdoor kiosks or in rooms where air conditioning is not always reliable. Before you finalise the RXM4AB2P7, check the permitted ambient range and any derating stated by the manufacturer against the real temperature inside your panel, and leave the recommended spacing around the device so that heat can escape. Long cable runs between the field and the marshalling cabinet are common on large sites, so confirm the signal types, wiring limits and earthing arrangement early in the design.

It also helps to standardise on a small number of part numbers across a project. Keeping a few spare RXM4AB2P7 units on site in Oman shortens recovery time after a fault, and documenting configuration settings makes replacement faster for the maintenance team.

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and does not represent itself as an official channel of the manufacturer.