Schneider Electric RE22R1CMR Harmony Timer Relay

RE22R1CMR: modular timing relay with 0.05 s to 300 h timing

The RE22R1CMR is a Schneider Electric Harmony timer relay in the modular timing relay format. It offers 2 timing functions, a relay output with 1 changeover contact, a rated supply of 24–240 V AC/DC, and a body 22.5 mm wide. Time can be set from 0.05 s to 300 h through 10 selectable ranges. Seven Star LLC supplies the RE22R1CMR in Oman and the GCC as an independent supplier based in Muscat.

Mounting, terminals and environment for the RE22R1CMR

The body is 22.5 mm wide and weighs 0.1 kg. It fits a 35 mm DIN rail conforming to IEC 60715. Field wiring uses Screw terminals, 1 × 0.5–1 × 3.3 mm² (20 AWG–12 AWG) solid without cable end, among other permitted conductor combinations, tightened to 0.6–1 N.m conforming to IEC 60947-1.

Protection degrees are listed as IP40 housing: conforming to IEC 60529; IP50 front face: conforming to IEC 60529; IP20 terminals: conforming to IEC 60529. Humidity tolerance is 95 % at 25–55 °C. Vibration resistance is 20 m/s² (f= 10–150 Hz) conforming to IEC 60068-2-6. Operation is listed over -20–60 °C and storage over -40–70 °C. Inside a closed Gulf enclosure in summer the air around a timer sits well above room temperature, so leave space around RE22R1CMR and keep it away from contactor coils and drives.

Technical specifications of the RE22R1CMR

Where the RE22R1CMR is used in Oman and the GCC

In Omani and wider GCC plants a timer of this type is typically chosen for keeping a ventilation fan, lube pump or cooling circuit running for a set period after the main equipment has stopped, extending a lighting or door-hold output after a command ends and maintaining a purge or run-on interval after shutdown. Oil and gas skids, power auxiliaries, desalination and water treatment packages and general industrial panels all use this class of device, and the combination of heat, dust and humidity makes sealed enclosures and clean terminal work important. Where timing is part of a safety function, the project specification and a suitable safety device take precedence over a general-purpose timer.

Selection and installation checklist for the RE22R1CMR

• Function: confirm the timing mode (C, Ct) against the sequence diagram on the datasheet.
• Time: choose a range between 0.05 s to 300 h with the upper limit just above your set point.
• Supply: 24–240 V AC/DC, with the wiring and source verified before energising.
• Output: 1 changeover contact, checked against the real load current and voltage.
• Fit: 22.5 mm wide, with the mounting type matching the panel.
• Front panel: Rotary knob; Diagnostic button; Potentiometer external; With test button.

Isolate and prove dead before wiring, mount this unit, connect the supply and output terminals, set the function and range, then run the sequence with a test load before the plant is released. Re-check the set time after any change to supply voltage or ambient conditions, and keep a record of the final setting on the panel drawing.

Timing functions and time ranges of the RE22R1CMR

This unit lists the following timing functions, each named by its datasheet code.

• C: Off-delay started by a control signal. The output closes with the control input and holds for the set time after it is released.
• Ct: Off-delay with a control signal, extended by pause and summation of the elapsed time.

The setting covers 0.05 s to 300 h in total, split across these ranges: 0.05 to 1 s; 0.3 to 3 s; 1 to 10 s; 3 to 30 s; 10 to 100 s; 30 to 300 s; 3 to 30 min; 30 to 300 min; 3 to 30 h; 30 to 300 h. The datasheet gives a setting accuracy of ± 10 % of full scale at 25 °C conforming to IEC 61812-1 and a repeat accuracy of ± 0.5 % conforming to IEC 61812-1, with drift of ± 0.05 %/°C against temperature and ± 0.2 %/V against supply voltage. Pick the range whose upper end is closest above the time you need, because accuracy is quoted as a share of full scale.

The RE22R1CMR among Harmony timer relays

Width, output type, supply span and function set separate the references. The table compares this unit with its closest neighbours from the same lane.

Supply and output of the RE22R1CMR

This unit is rated for 24–240 V AC/DC over a range of 0.85–1.1 Us at 50–60 Hz ± 5 %, drawing 3 VA at 240 V AC and 1.5 W at 240 V DC. Because the supply span is wide, a single part can cover several control voltages, though the lowest figure on the span is the practical minimum for a dependable pick-up. The datasheet immunity to microbreaks is 10 ms.

The output is a relay stage with 1 C/O timed contact, cadmium free, rated for 8A at up to 250 V AC, with a minimum switching current of 10 mA at 5 V DC. Electrical durability is listed as 100000 cycles, 8 A at 250 V, AC-1; 100000 cycles, 2 A at 24 V, DC-1 and mechanical durability as 10000000 cycles.

Information to send with an RFQ for the RE22R1CMR

• Exact reference RE22R1CMR and the quantity.
• Required timing function and set time.
• Control supply voltage and whether AC or DC.
• Load type and current on the output.
• Any matching socket, base or accessory needed.
• Delivery location and required date.

Documents and quotation

The Schneider Electric datasheet for the RE22R1CMR is attached on this page and carries the full specification and function diagrams. Its date is 7 Nov 2026, as printed on the manufacturer’s document, so check the status of the part before ordering.

Send the reference RE22R1CMR, 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.