RE22R2MMU timer: function dial, delay range and two-contact logic
Schneider Electric RE22R2MMU is a Harmony timing relay. This reference page starts with the exact ordering identity and the checks that matter when sourcing RE22R2MMU for an existing installation. The shared main collage represents the product category, not a unique photograph of RE22R2MMU.
Technical data for selection
| Technical item | Verified value / selection note |
|---|---|
| Exact ordering code | RE22R2MMU |
| Product family | Harmony timing relay |
| Contacts | 2 changeover contacts |
| Nominal contact rating | 8 A under stated conditions |
| Supply | 24 V DC or 24–240 V AC class |
Application fit
Record the selected timing function and dial settings before changing the relay. Two terminals can appear correct while the control sequence differs if the function setting changes.
For RE22R2MMU, compare the exact nameplate, wiring diagram and manufacturer literature before allowing a substitution. A close-looking suffix can change ratings, interface or delivered components.
On-site replacement notes
Check load duty, supply, terminal map and reset behavior. Commission with a measured timing test and observe the complete control cycle, including power loss and recovery.
Document the existing RE22R2MMU circuit, accessories and setpoints before removing hardware. Use the site's isolation and commissioning procedures, and preserve the approved engineering record.
What to confirm on the installed unit
Record the selected timing function and dial settings before changing the relay. Two terminals can appear correct while the control sequence differs if the function setting changes.
The final choice of RE22R2MMU depends on the actual installation. Check ambient conditions, available space, mating parts and local electrical requirements rather than inferring fit from appearance.
Before energizing or commissioning
Check load duty, supply, terminal map and reset behavior. Commission with a measured timing test and observe the complete control cycle, including power loss and recovery.
After fitting RE22R2MMU, verify the intended function under representative operating conditions and record the result. A matching code does not eliminate the need for a functional check.
Related ordering codes in the same visual family
The following 10 references resemble RE22R2MMU in their designation. They are grouped here for inquiry and comparison, not claimed to be electrically interchangeable with RE22R2MMU. Check each complete suffix, rating and connection before ordering.
RE22R2MYMR, RE22R2AMR, RE22R2CMR, RE22R2KMR, RE22R1MAMR, RE22R1MYMR, RE22R2QTMR, RE22R1AMR, RE22R1KMR, RE22R1ACMR
Purchasing checklist
When requesting RE22R2MMU, include the exact RE22R2MMU label, site voltage, connected equipment, installation photo and required quantity. State whether original RE22R2MMU stock or a documented engineering alternative is acceptable. Ask the supplier to confirm current availability, accessories and manufacturer documentation.
Before releasing RE22R2MMU to site, compare the delivered full code and terminal/connector arrangement with the approved bill of materials. Keep RE22R2MMU associated with its original application and obtain qualified review if any rating, function or lifecycle status differs.
