Schneider Electric RXM4AB1B7 RXM 4 C/O Relay 24 V AC

RXM4AB1B7: Harmony RXM 4 C/O relay with 24 V AC coil

The RXM4AB1B7 is a Schneider Electric Harmony RXM miniature plug-in relay with four changeover (C/O) contacts and a 24 V AC coil. This version is without a status LED and has a lockable test button. Its datasheet lists a conventional enclosed thermal current of 6 A, flat faston-type pins and a net weight of 37 g. Seven Star LLC supplies the RXM4AB1B7 in Oman and the GCC as an independent supplier based in Muscat.

Reading the references in this family, the digit after RXM identifies the 4 C/O contact set, the letter pair identifies the contact family (AB: 6 A thermal current, AgNi contacts), the next digit separates the versions without LED (1 without LED), and the last two characters are the coil code, here B7 for 24 V AC. This is our reading of the pattern across the references we reviewed, not a published ordering table, so confirm the full reference before ordering.

The RXM4AB1B7 among RXM 4 C/O relays

Siblings in this lane differ in coil voltage, contact rating, LED and test button. The table lists neighbouring references.

Sockets such as the RXZE2M114, RXZE2M114M and RXZE2S114M accept RXM2 and RXM4 relays, and the RXZ-series accessories are matched to the same relay body.

Contact capability of the RXM4AB1B7

The four C/O contacts use AgNi material. The datasheet gives 6 A at 250 V AC and 6 A at 28 V DC on the normally open side, with 3 A on the normally closed side, plus UL-based figures of 6 A at 277 V AC and 8 A at 30 V DC. The maximum switching capacity is 1500 VA/168 W and the minimum is 170 mW at 10 mA, 17 V.

The electrical durability entry reads 100000 cycles for resistive load, against a mechanical durability of 10000000 cycles. Inductive loads such as contactor coils and solenoids reduce contact life, so fit RC or varistor suppression across AC loads and a free-wheeling diode across DC loads, and do not read the resistive life as a guarantee for every load.

Technical specifications of the RXM4AB1B7

Selection checklist for the RXM4AB1B7

• Coil: 24 V AC, with the real supply inside 19.2–26.4 V AC V AC.
• Load: up to 6 A thermal current, checked per contact against the AC or DC rating.
• Indication: no LED on this version.
• Manual override: lockable test button present.
• Base: an RXM-compatible socket with the right terminal style.
• Quantity: relays are sold in indivisible quantities, so confirm the pack size with us.

Indication and manual operation on the RXM4AB1B7

The RXM4AB1B7 has a lockable test button but no status LED. The button lets a technician actuate the contacts by hand and lock them over during commissioning, but there is no indicator to show coil status, so a meter or the connected load is the check.

When choosing between versions, remember that these features are fixed on the relay itself. A relay without LED cannot be upgraded and has to be replaced by the LED variant if indication is later required, and the same goes for the test button.

Coil of the RXM4AB1B7: 24 V AC

24 volts is the most common control voltage in PLC cabinets and instrument marshalling panels, so this coil value fits the output of a typical controller or supply directly. The datasheet gives operating voltage limits of 19.2–26.4 V AC V AC, which is the window within which the coil should be driven. A coil resistance of 180 Ohm at 20 °C ± 15 % and a consumption of 1.2 at 60 Hz describe how much the control source must supply.

The drop-out threshold is listed as ≥ 0.15 Uc, meaning the relay releases when the coil voltage falls to that fraction of 24 V AC. On AC circuits, check how the supply behaves during dips and ripple, because a voltage that hovers between pick-up and drop-out causes chatter. AC coils also hum if the supply frequency or waveform is poor.

Information to send with an RFQ for the RXM4AB1B7

• Exact reference RXM4AB1B7 and the quantity.
• Coil supply voltage and type, 24 V AC here.
• Load type and current on the contacts.
• Socket or base type already installed.
• Other coil voltages or LED versions needed in the same order.
• Delivery location and timeline.

For critical duties, keep one tested spare of every relay and base type on site, and label the shelf location in the maintenance system so that outage crews can find it quickly.

If the panel is later modified, update the drawings with the exact references fitted, because mismatches between drawings and hardware cost more time than almost any other documentation fault.

When a project is tendered with alternates, state the exact accepted references in the bill of materials, since mixed substitutions between similar-looking relays and bases are a common cause of rework at site.

Store spares in their original packaging in a dry cabinet, away from direct sun and corrosive atmospheres, so that terminals and pins stay clean until they are needed.

Documents and quotation

The Schneider Electric datasheet for the RXM4AB1B7 is attached on this page and holds the full specification summarised above. It is dated 8 Nov 2026 as printed on the manufacturer’s document.

Send us the reference RXM4AB1B7, quantity and delivery location and Seven Star LLC will reply to your request. We supply as an independent supplier based in Muscat and do not act for the manufacturer.