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Brand: Schneider Electric
Schneider Electric RM22LA32MR RM22-L level relay
Description
RM22LA32MR: RM22L level control relay in the Harmony range
The RM22LA32MR is a Schneider Electric Harmony level control relay from the RM22 family, built to supervise liquid level through resistive probes. It is powered from a separate 24–240 V AC/DC 50/60 Hz supply, offers 2 changeover output contacts, and is housed in a 22.5 mm wide DIN-rail case. Seven Star LLC supplies the RM22LA32MR in Oman and the GCC as an independent supplier based in Muscat.
The datasheet we reviewed is dated 8 Nov 2026. It describes a unit with a test button on the front panel.
Settings, measurement and timing of the RM22LA32MR
The measuring range is 0.25–1000 kΩ. Time delay: Adjustable 0.1–30 s, ± 10 % of the full scale value Tt- time delay upon fault. The sensitivity scale is 0.25–5 kΩ LS (Low Sensitivity); 5–100 kΩ St (Standard Sensitivity); 50–1000 kΩ HS (High Sensitivity), with adjustment of 5–100 %.
When commissioning the RM22LA32MR, set the thresholds against the real running values of the plant, not against the nameplate alone. Where an adjustable fault delay is available, a longer time suits starting transients and short disturbances, while a short time protects equipment faster. Note the dial positions on the commissioning sheet so the settings can be restored after maintenance.
What the RM22LA32MR monitors
According to the datasheet, this relay covers the following functions. Each one is explained in practical terms below.
- Detection by resistive probes. Conductive liquids are sensed through electrodes. When the liquid touches an electrode the circuit between probe and common closes through the liquid, and the relay reads the change in resistance. Low voltage and low current at the electrodes keep the sensing safe, and the sensitivity scale lets you adapt to clean or highly resistive liquids.
Technical specifications of the RM22LA32MR
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Schneider Electric / RM22LA32MR |
| Relay type | Level control relay |
| Relay name | RM22L |
| Monitored parameters | Detection by resistive probes |
| Time delay | Adjustable 0.1–30 s, ± 10 % of the full scale value Tt- time delay upon fault |
| Switching capacity in VA | 2000 VA |
| Minimum switching current | 10 mA at 5 V DC |
| Maximum switching current | 8 A AC |
| Contacts | 2 C/O |
| Maximum switching voltage | 250 V AC |
| [Un] rated nominal voltage | 24–240 V AC/DC 50/60 Hz, non self-powered |
| Supply voltage limits | 20.4–264 V AC/DC |
| Power consumption | 1.5 W DC |
| Nominal output current | 8 A |
| Delay at power up | 2.5 s; 0.6 s |
| Maximum electrode voltage | 12 V AC |
| Maximum electrode current | 1 mA |
| Repeat accuracy | ± 2 % for time delay |
| Maximum probe cable distance | 100 m between probe and delay devices |
| Sensitivity scale | 0.25–5 kΩ LS (Low Sensitivity); 5–100 kΩ St (Standard Sensitivity); 50–1000 kΩ HS (High Sensitivity) |
| Sensitivity adjustment | 5–100 % |
| Maximum supply current for sensors | 1 mA sensors |
| Overvoltage category | III conforming to IEC 60664-1 |
| Connections – terminals | Screw terminals, 2 × 0.5–2 × 2.5 mm² (20 AWG–14 AWG) solid without cable end; Screw terminals, 2 × 0.2–2 × 1.5 mm² (24 AWG–16 AWG) flexible with cable end; Screw terminals, 1 × 0.5–1 × 3.3 mm² (20 AWG–12 AWG) solid without cable end; Screw terminals, 1 × 0.2–1 × 2.5 mm² (24 AWG–14 AWG) flexible with cable end |
| Tightening torque | 0.6–1 N.m conforming to IEC 60947-1 |
| Housing material | Polycarbonate |
| Mounting support | 35 mm DIN rail conforming to IEC 60715 |
| Mounting position | Any position |
| Electrical durability | 100000 cycles |
| Mechanical durability | 10000000 cycles |
| Measurement range | 0.25–1000 kΩ |
| Control type | With test button |
| Standards | IEC 60255-1 |
| Product certifications | UL, RCM, CSA, GL, CCC, CE, EAC |
| Relative humidity | 93–97 % at 25–55 °C conforming to IEC 60068-2-30 |
| IP degree of protection | IP20 (terminals) conforming to IEC 60529; IP40 (housing) conforming to IEC 60529; IP50 (front panel) conforming to IEC 60529 |
| Pollution degree | 3 conforming to IEC 60664-1 |
| Storage temperature | -40 to 70 °C |
| Width | 22.5 mm |
| Net weight | 0.11 kg |
| Packing | 1 piece, 122 g; 40 pieces in the second package level |
| Country of origin | Indonesia |
| Warranty | 18 months |
Output contacts and durability of the RM22LA32MR
The output is 2 changeover contacts, rated 8 A nominal at up to 250 V AC, with a switching capacity of 2000 VA and a minimum switching current of 10 mA at 5 V DC. The listed durability is 100000 cycles electrical and 10000000 cycles mechanical. The contacts of the RM22LA32MR are intended for pilot duty such as contactor coils, signal lamps and PLC inputs. For larger loads use an interposing contactor and keep the relay contact for the control circuit.
Because the minimum switching current is small, the same output can also feed a low-level signal such as a PLC input, but a contact that has switched heavy inductive loads should not later be reused for low-level signals.
Selection checklist for the RM22LA32MR
- Liquid type and its conductivity, which sets the sensitivity range.
- Number of probes and cable length to the tank.
- Control supply voltage.
- Pump-up or pump-down logic needed on the output.
- Width 22.5 mm on the rail and enclosure space.
- Approvals and temperature limits against the project specification.
The RM22LA32MR within the RM22 range
Neighbouring references in this range differ in what they supervise, the measuring range and the output arrangement. The table lists the RM22 references we have datasheets for.
| Part number | Function | Range | Contacts | Width / fixing |
|---|---|---|---|---|
| RM22JA31MR | overcurrent or undercurrent detection, overcurrent or undercurrent in window mode | 4 mA–1 A current AC/DC 50/60 Hz | 2 changeover | 22.5 mm |
| RM22LA32MR (this page) | detection by resistive probes | 0.25–1000 kΩ | 2 changeover | 22.5 mm |
| RM22LG11MR | detection by resistive probes | 5–100 kΩ | 1 changeover | 22.5 mm |
| RM22LG11MT | detection by resistive probes | 5–100 kΩ | 1 changeover | 22.5 mm |
| RM22TA33 | phase sequence, phase failure detection | 380–480 V voltage AC | 2 changeover | 22.5 mm |
| RM22TG20 | phase sequence, phase failure detection | 208–480 V voltage AC | 2 changeover | 22.5 mm |
| RM22TR31 | phase sequence, phase failure detection | 200–240 V voltage AC | 2 changeover | 22.5 mm |
| RM22TR33 | overvoltage and undervoltage detection, phase sequence | 380–480 V voltage AC | 2 changeover | 22.5 mm |
| RM22UA33MR | undervoltage and overvoltage in window mode, overvoltage or undervoltage detection | 15–500 V AC/DC | 2 changeover | 22.5 mm |
| RM22UB34 | overvoltage and undervoltage detection | 80–300 V AC/DC | 2 changeover | 22.5 mm |
Environment, insulation and approvals for the RM22LA32MR
Storage is listed at -40 to 70 °C. The datasheet does not give an operating temperature range for this reference, so confirm the allowed ambient temperature before use in a hot enclosure. Relative humidity is 93–97 % at 25–55 °C conforming to IEC 60068-2-30. Protection is IP20 (terminals) conforming to IEC 60529, pollution degree 3 conforming to IEC 60664-1. The housing is polycarbonate.
Certifications listed on the datasheet for this reference: UL, RCM, CSA, GL, CCC, CE, EAC. Check the marks against your project specification, because requirements differ between sites.
In a closed panel in an Omani summer the air near the relay can be much hotter than the room, so leave space around it and keep it away from contactors and power resistors.
Information to send with an RFQ for the RM22LA32MR
- Exact reference RM22LA32MR and quantity.
- Supply voltage, frequency and type of network.
- The load or machine being supervised and the required alarm or trip behaviour.
- Required contact arrangement and rating.
- Related relays, sockets or accessories needed on the same order.
- Delivery location and timeline.
Documents and quotation
The Schneider Electric datasheet for the RM22LA32MR is attached on this page and holds the complete specification summarised above, as printed on the manufacturer’s document dated 8 Nov 2026.
Send us the reference RM22LA32MR, 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.
Other Models in the Se Harmony Rm22 Range
Seven Star LLC supplies models from the Se Harmony Rm22 range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Schneider Electric RM22JA31MR RM22-JA 4 mA-1 A current relay | Contactors & Overload Relays | View details |
| Schneider Electric RM22LA32MR RM22-L level relay | Contactors & Overload Relays | You are viewing this model |
Datasheets & Documents
- Datasheet Schneider Electric RM22LA32MR Datasheet Download
Reviews (0)
About brand
Schneider Electric is the French group for energy management and industrial automation: low and medium voltage switchgear and circuit breakers, motor control, drives, PLCs, power monitoring, UPS systems and building management. Its history goes back to 1836, when the brothers Adolphe and Eugène Schneider took over the iron and steel works at Le Creusot in Burgundy. Over the 20th century the company left steel and heavy engineering and became an electrical group through acquisitions such as Merlin Gerin, Télémécanique, Square D and Modicon. Its head office is in Rueil-Malmaison near Paris, and its shares are listed on Euronext Paris.
Schneider Electric company profile
| Origins | 1836, Le Creusot, France: Adolphe and Eugène Schneider take over the Le Creusot foundry |
|---|---|
| Headquarters | Rueil-Malmaison (Paris region), France |
| Ownership | Public company listed on Euronext Paris |
| Key acquisitions | Télémécanique (1988), Square D (1991), Merlin Gerin (1992), Modicon (1997), APC (2007), Invensys (2014); majority owner of AVEVA software |
| Brand names still in use | Acti9, ComPacT and MasterPacT breakers, TeSys motor control, Altivar drives, Altistart soft starters, Modicon PLCs, Harmony control components, PowerLogic and Easergy protection and metering, APC UPS, EcoStruxure software platform |
| Product families | Low voltage distribution, medium voltage switchgear and protection relays, motor control and drives, PLCs and HMIs, power meters, UPS and cooling, enclosures, building automation and energy software |
Milestones
- 1836: The Schneider brothers acquire the Le Creusot works; the business grows in steel, locomotives and heavy engineering.
- 1975: First investment in Merlin Gerin, a French maker of electrical distribution equipment.
- 1988–1992: Télémécanique, Square D (USA) and Merlin Gerin join the group, making it an electrical specialist.
- 1997: Modicon, the company behind the first programmable logic controller, joins the group.
- 1999: The group takes the name Schneider Electric.
- 2007 and 2014: APC (UPS and data centre power) and Invensys (process automation) are acquired.
Choosing Schneider Electric breakers and motor control
Circuit breakers are chosen by current and breaking capacity. Acti9 miniature circuit breakers (iC60, C120) protect final circuits up to 125 A. ComPacT NSX molded case breakers cover about 16 to 630 A, and the letter after the frame size sets the breaking capacity: B, F, N, H, S, L from lowest to highest. MasterPacT air circuit breakers are used as main incomers on large switchboards. For motors, a TeSys contactor with an LRD overload relay or a GV2 motor circuit breaker suits direct starting, an Altistart soft starter reduces starting current, and an Altivar drive controls speed. The breaking capacity must always be at least the prospective short-circuit current at the point of installation.
Where Schneider Electric products are used
In Oman and the GCC, Schneider Electric equipment is found in main and sub-main switchboards of commercial and residential buildings, motor control centres in water, oil and gas and industrial plants, substations protected by Sepam and Easergy relays, data centres powered by Galaxy and APC UPS systems, and buildings controlled by EcoStruxure Building Operation.
APC by Schneider Electric: UPS and critical power
Since 2007, APC has been part of Schneider Electric and is now its product brand for uninterruptible power supplies, replacement batteries, battery packs, network management cards and rack power distribution. Our APC catalogue covers Smart-UPS line-interactive and on-line models, Easy UPS On-Line, the modular Symmetra LX, RM and PX ranges, Silcon three-phase systems and their spare part kits, and the RBC cartridges that keep them running. Schneider Electric breakers, drives and PLCs can be quoted together with APC UPS systems in one request.
Schneider Electric products we list
| Family | Examples |
|---|---|
| Circuit breakers | Acti9 iC60N, C120N, NSX100F, NSX250N, NSX630, EasyPact EZC, MasterPacT MTZ1, MasterPacT NW |
| Motor control | TeSys Deca LC1D, TeSys F, LRD overload relay, GV2ME08, Altistart 22, Altistart 480 |
| Drives | Altivar 12, Altivar 320, ATV340, Altivar Process 630, ATV930, Lexium 32 servo |
| PLCs, HMIs and relays | Modicon M221, M241, M580 BMEP582040, Zelio Logic, Magelis HMISTU655 |
| Protection, metering and power | Sepam series 20, Easergy P3U30, MiCOM P139, PM5560, iEM3255, Galaxy VS UPS |
Ordering Schneider Electric products: what we need
Send the commercial reference from the label (for example LC1D18M7 or ATV320U22N4C). For breakers, confirm the rated current, number of poles, breaking capacity and trip unit. For contactors, give the coil voltage. For drives, give the motor power and supply voltage. APC products are listed on their own brand page.
Facts checked against Schneider Electric's published company history, October 2026.
Browse Schneider Electric products by category: Circuit Breaker, Electrical & Power Modules, AC Drives, PLC & I/O Cards, Metering Systems, UPS and Batteries.
FAQ
Questions about the Schneider Electric RM22LA32MR RM22-L level relay
Answers from our engineering team on installation, compatibility and integration.
01What does the RM22LA32MR monitor?
It is the RM22L Harmony control relay for liquid level through resistive probes. See the functions list on this page for how each one works.
02What supply and measuring range does the RM22LA32MR have?
The datasheet lists the supply as 24...240 V AC/DC 50/60 Hz, non self-powered with limits of 20.4…264 V AC/DC, and a measurement range of 0.25...1000 kOhm.
03What output does the RM22LA32MR provide?
The output is 2 C/O contacts, rated 8 A nominal at up to 250 V AC. Electrical durability is listed as 100000 cycles and mechanical durability as 10000000 cycles.
04How is the RM22LA32MR mounted and what size is it?
It clips onto a 35 mm DIN rail and measures 22.5 mm wide. Terminals are screw type, tightened to 0.6…1 N.m conforming to IEC 60947-1.
05What environment is the RM22LA32MR rated for?
The datasheet gives no operating temperature for this reference, storage at -40 to 70 degrees C, relative humidity 93…97 % at 25…55 °C conforming to IEC 60068-2-30 and protection IP20 (terminals) conforming to IEC 60529.
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