2AOOW-RMD1124Zigbee Module

Module Integration Manual — EMBD1124 (Provisional FCC submission, Full Modular Approval) Document title — Module Integration Manual for EMBD1124 Module model / FCC ID — EMBD1124 /2AOOW-RMD1124 Manufacturer (Grantee) — TOTO USA, Inc., 5351 E. Jurupa St., Ontario, CA 91761 United states, Mr Fernando Fernandez Revision — Provisional (for FCC submission) Date — 2026/03/18 Scope — This manual provides the integration instructions and limitations required for host manufacturers to maintain compliance when installing the EMBD1124 module under FCC Part 15 Subpart C modular approval. 1. Revision history Rev. — Date — Summary Provisional —2026/03/18 — Draft for FCC submission; final values (FCC ID, measured RF data, antenna dimensions) to be inserted after certification testing. 2. Module summary Module name / model — EMBD1124 FCC ID — 2AOOW-RMD1124 Radio type / functions — 2.4GHz Proprietary Function (IEEE 802.15.4 based) Operating frequency range — 2.405~2.480MHz Maximum conducted output power — 3dBm Antenna type — PCB pattern antenna (printed on module PCB); fixed and non‑ removable; no external antenna connector. Antenna gain — 2.14dBi Approval type — Full Modular Approval (meets modular transmitter requirements of 47 CFR §15.212). 3. Regulatory compliance statements Applicable rules — FCC Part 15 Subpart C (unlicensed intentional radiators) and modular transmitter requirements per 47 CFR §15.212. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Grantee responsibility — The module manufacturer (grantee) is responsible for the module’s compliance and for providing accurate integration instructions to host manufacturers. Host manufacturers must follow these instructions to preserve the module’s authorization. 4. Host manufacturer responsibilities and limitations Do not modify the module RF circuitry, antenna pattern, or antenna feed. Any modification voids the modular approval. Antenna replacement — Not permitted. The EMBD1124 uses a fixed PCB pattern antenna and must not be altered or replaced. Antenna keep‑out — Maintain the antenna keep‑out area and clearances specified in Section 9. Failure to maintain the keep‑out may detune the antenna and cause non‑compliance. Grounding and metal enclosure — Follow the recommended mounting and grounding instructions; metal parts or shields must not overlap the antenna keep‑out. Labeling and documentation — Host must apply required labeling and include the user statements specified in Section 7. 5. Installation instructions Mechanical mounting — Place EMBD1124 on the host PCB using the recommended land pattern and solder all module pads per the mechanical drawing. Use mechanical fasteners only where shown on the module drawing. Antenna keep‑out — Keep all metal components, ground pours, and other RF circuitry outside the antenna keep‑out polygon. As tested keep‑out: 5 mm radius from antenna reference point. Clearance to enclosure — Maintain minimum clearance between antenna and enclosure interior. As tested clearance : 1 mm. Power supply — Provide a regulated supply within the module’s recommended voltage range and include recommended decoupling capacitors close to the module power pins. I/O connections — Connect UART, GPIOs per the pinout in Section 10. Do not route external antenna signals to RF pins. EMC best practices — Route high‑speed traces away from the antenna area, add ferrite beads or filters on long cables, and avoid large ground pours directly adjacent to the antenna. 6. RF exposure (SAR) and RF safety RF exposure compliance — EMBD1124 was evaluated for RF exposure as part of the modular approval. Host manufacturers must ensure the final product maintains the same separation distances and usage conditions used during testing. User information — Include this statement in the host user manual: “This device complies with FCC radiation exposure limits. The device must be used with a minimum separation of 20 cm from the human body. 7. Labeling and documentation requirements for host product External labeling — Host product must display: “Contains FCC ID: 2AOOW-RMD1124” on the exterior. If exterior placement is impractical, place the statement in the battery compartment or another user‑accessible area. User manual statements — Include: (a) the FCC ID and module manufacturer contact; (b) the RF exposure statement from Section 6; (c) a statement that the antenna is a fixed PCB pattern and must not be modified or replaced. 8. Final product testing and verification guidance Verification scope — Host manufacturer must verify that the final product still meets FCC radiated emission limits and that antenna integration did not increase emissions beyond certified levels. Recommended tests — Full‑product radiated emissions scan across applicable frequency bands; conducted emissions if the host introduces mains or wired interfaces; RF exposure verification if user proximity or usage conditions change. When re‑testing is required — Re‑test when the host enclosure, antenna surroundings, power levels, or intended use differ materially from the conditions used during module certification. 9. Mechanical drawings and antenna details Module outline drawing — See drawing EMBD1124‑MECH‑Dwg‑RevA (include dimensions, mounting holes, and recommended land pattern). Antenna layout — Antenna copper pattern, antenna reference point (ARP), and antenna keep‑out polygon are shown on drawing EMBD1124‑ANT‑Dwg‑RevA. As‑tested antenna keep‑out polygon and reference coordinates must be used without modification. Mounting examples — Acceptable and unacceptable host placements are illustrated: maintain the antenna area free of metal, large ground pours, and tall components. 10. Electrical specifications and pinout Pin diagram — See EMBD1124‑PINOUT for pin positio…

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Statement as to whether the Applicant is identified on the Covered List pertaining to 47 CFR 2.911(d)(5)(ii) Date: April 7, 2026 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046-1609 To Whom It May Concern: I, an officer of TOTO USA, Inc., certify that, as of the date of the filing of the application for FCC ID: 2AOOW-RMD1124, TOTO USA, Inc.(as a specifically named entity or any of its subsidiaries or affiliates) on the Covered List, established pursuant to 47 CFR 1.50002, as an entity producing covered communications equipment. Sincerely, Signature: Name:Fernando Fernandez Title:Vice President, Codes and Standards On behalf of: TOTO USA, Inc. 5351 E. Jurupa St., Ontario, CA 91761, United States Telephone: (909) 974-5670

Certification that Equipment is not prohibited from receiving an Equipment Authorization pertaining to 47 CFR 2.911(d)(5)(i) Date: April 7, 2026 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046-1609 To Whom It May Concern: I, an officer of TOTO USA, Inc., certify that, as of the date of the filing of the application for FCC ID: 2AOOW-RMD1124, the equipment for which TOTO USA, Inc. authorization through certificate is not prohibited from receiving an equipment authorization pursuant to 47 CFR 2.903. Sincerely, Signature: Name:Fernando Fernandez Title:Vice President, Codes and Standards On behalf of: TOTO USA, Inc. 5351 E. Jurupa St., Ontario, CA 91761, United States Telephone: (909) 974-5670

U.S. Agent Certification Letter pertaining to 47 CFR 2.911(d)(7) Date: April 7, 2026 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046-1609 To Whom It May Concern, I, an officer of TOTO USA, Inc., certify that, as of the date of the filing of the application for FCC ID: 2AOOW-RMD1124, TOTO USA, Inc. The Applicant/Agent acknowledge its consent and obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and e-mail address of the Applicant. Furthermore, the Applicant acknowledges the acceptance of its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any FCC-related administrative or judicial proceeding involving the equipment, whichever is later. The Applicant further acknowledges that it is its responsibility to inform the FCC whenever the agent information changes. Applicant and designated U.S. Agent Company Name: TOTO USA, Inc. Contact Person: Fernando Fernandez Address:5351 E. Jurupa St., Ontario, CA 91761, United States Telephone No: (909) 974-5670E-mail: [email protected] FCC FRN:0027115005 Sincerely, Signature: Name:Fernando Fernandez Title:Vice President, Codes and Standards On behalf of: TOTO USA, Inc.

FCC Confidentiality Request Date: April 7, 2026 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046-1609 To Whom It May Concern: This letter is to comply with 47 CFR 0.457(d)(2) and 0.459 pertaining to confidential material. TOTO USA, Inc. requests that the following documents regarding this submission for FCC ID: 2AOOW- RMD1124 be kept confidential: 1. Schematics 2. Block Diagram 3. Technical Description / Parts List The material above contains technical data which would customarily be guarded from competitors. Sincerely, Signature: Name:Fernando Fernandez Title:Vice President, Codes and Standards On behalf of: TOTO USA, Inc. 5351 E. Jurupa St., Ontario, CA 91761, United States Telephone: (909) 974-5670

FCC Request Letter for Modular Approval Date: April 7, 2026 Model: EMBD1124 FCC ID: 2AOOW-RMD1124 The modular transmitter complies with the following requirements in FCC Part 15 Section 15.212 for Modular Approval: RequirementComment 1. Yes The radio element of the modular transmitter must have its own shielding. Shielding is provided by shield case. 2. Yes The modular transmitter must have buffered modulation/data inputs (if such inputs are provided). All inputs are buffered through buffer IC (7C7SZ07FE). 3. Yes The modular transmitter must have its own power supply regulation. Power supply regulation is performed by LDO (MM3534A33RRE). 4. Yes The modular transmitter must comply with the antenna requirements of FCC 15.203 and 15.204(c). The module incorporates a permanently attached PCB trace antenna. 5. Yes The modular transmitter must be tested in a stand-alone configuration, i.e. the module must not be inside another device during testing. The modular transmitter was tested in a stand-alone configuration. Refer to the test report for more details. 6. Yes The modular transmitter must be labeled with its own FCC ID. If the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. The modular transmitter is labeled with its own FCC ID. As it is not visible when the module is installed into the host device, the label of the host device will bear the wording - 7. Yes The modular transmitter must comply with any specific rules or operating requirements that ordinarily apply to a complete transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. The modular transmitter is compliant with all applicable FCC rules. Detailed instructions are given in the user manual. 8. Yes The modular transmitter must comply with any applicable RF exposure requirements. The modular transmitter complies with RF exposure requirements. Refer to the RF exposure statement for more details. Signature: Name:Fernando Fernandez Title:Vice President, Codes and Standards On behalf of: TOTO USA, Inc. 5351 E. Jurupa St., Ontario, CA 91761, United States Telephone: (909) 974-5670

EMDB1124 External Photos

EMDB1124 Internal Photos

FCC ID: 2AOOW-RMD1124 Produkte Products RF Exposure Statement: JP26Y9Z8 002 Page 1 of 1 Client: TOTO USA, Inc. 5351 E. Jurupa St., Ontario, CA 91761 United States Test item: Zigbee Module Identification: EMBD1124 FCC Requirement According to FCC 2.1091, mobile equipment must comply with the following applicable limit for maximum permissible exposure (MPE) specified in FCC 1.1310: Equipment Use Frequency Range Power Density [mW/cm 2 ] Average Time [min] General Population / Uncontrolled Exposure 1.5 – 100GHz 1 30 Measurement Result The maximum measured transmitter power is given in the following table: Conducted Output Power P out [mW] Maximum Antenna Gain [dBi] Power Density at 20cm [mW/cm 2 ] 0.86 2.14 0.0003 Note: The power density S in mW/cm 2 is calculated according to the Friis formula: S = (P out · G) / (4π · D 2 ), where P out = antenna conducted output power in mW, G = antenna gain in linear scale (here: 2.14dBi = 1.64 linear), D = distance between observation point and radiating structure in cm (here: 20cm). Conclusion The device complies with the FCC RF exposure requirements since the maximum transmitter power density is below the FCC limit. Refer to test report JP26Y9Z81 001 for more details. NOTE: EMBD1124 is subject to Single Modular Approval assessment under FCC Part.15.247. TÜV Rheinland Japan Ltd. – Global Technology Assessment Center 4-25-2 Kita-Yamata, Tsuzuki-ku, Yokohama 224-0021, Japan

EMDB1124 Antenna Specification 2026/2/27 Sanwa EI pattern antenna on PCBプリント基板上のパターンアンテナ quarter‑wave inverted‑F antenna1/4波長逆Fアンテナ 2.14 dBi or less2.14dBi以下 Antenna model name : Type : Gain : Antenna size (mm) 18041XY 水平垂直 18041YZ 水平垂直 18041ZX 水平垂直 XY アンテナ 受信アンテナ YZ 受信アンテナ ZX 受信アンテナ

  

  

      
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