SICK RMS2731C-636111: 2D Radar Sensor with 100 m Range and 4 Independent Monitoring Zones
- SICK RMS2731C-636111 is a 61 GHz FMCW 2D radar sensor with a detection range of up to 100 m and support for 4 independent monitoring zones.
- Performs reliably in rain, dust, fog, and harsh outdoor environments, making it a strong alternative to LiDAR for industrial outdoor applications.
- IP67/IP69 protection, operating temperature from -40°C to +65°C, and an MTBF of 81 years ensure long-term reliability.
- Supports Ethernet communication and 4 digital outputs, enabling easy integration with PLCs and automation systems.
- Ideal for warehouse logistics, gate monitoring, and perimeter surveillance thanks to its wide 120° detection coverage.
- RMS2731C-636111 is approved for use in Vietnam, the EU, and most Asian markets, allowing straightforward deployment without additional radio licensing.
The SICK RMS2731C-636111 (order number: 1128853) is an advanced area monitoring radar sensor from the RMS2000 series. It employs FMCW technology at 61 GHz with a working range of 0.4 m to 100 m and supports up to 4 independently configurable monitoring zones. With IP67/IP69 protection and radio approval in Vietnam, the EU, UK, India, and 10 other countries, this sensor outperforms conventional 2D laser scanners (LiDAR) in outdoor, dusty, or foggy environments.
What is the RMS2731C-636111? Overview of the SICK RMS2000 Series
The RMS2731C-636111 belongs to SICK’s RMS2000 radar sensor series, specifically designed for area surveillance and moving object detection in industrial and logistics environments. Unlike traditional 2D laser scanners (LiDAR), which can be degraded by rain, dust, and fog, the RMS2000’s 61 GHz radar maintains stable performance in all weather conditions.
The RMS-A model (part code 636111) carries radio approvals for the Asia-Pacific and EU markets, enabling compliant deployment in Vietnam without the need for additional licensing.
Technical Specifications – RMS2731C-636111
| Technical Specification |
Value |
| Part Number |
RMS2731C-636111 |
| Order Number |
1128853 |
| Measuring Principle |
FMCW (Frequency-Modulated Continuous Wave) |
| Frequency Band |
61 GHz – 61.5 GHz |
| Transmitting Power |
≤ 100 mW (e.i.r.p.)
< 20 dBm |
| Working Range |
0.4 m – 100 m |
| Scanning Range (1 m² RCS) |
50 m |
| Scanning Range (10 m² RCS) |
100 m |
| Distance Accuracy (to 20 m) |
0.04 m |
| Distance Accuracy (to 50 m) |
0.1 m |
| Distance Resolution |
0.4 m |
| Horizontal Aperture Angle |
±60° |
| Vertical Aperture Angle |
±4° |
| Angular Accuracy (Azimuth) |
1.5° |
| Angular Resolution (Azimuth) |
15° |
| Speed Range |
±30 m/s |
| Speed Accuracy |
0.0625 m/s |
| Speed Resolution |
0.625 m/s |
| Supply Voltage |
9 V DC – 32 V DC |
| Power Consumption |
Typ. 4 W, Max. 36 W |
| Measurement Cycle |
100 ms |
| Initialization Time |
Typ. 20 s |
| Number of Monitoring Zones |
Up to 4 zones |
| Digital Inputs |
2 |
| Digital Outputs |
4 |
| Ethernet |
10/100 MBit/s |
| Enclosure Rating |
IP67, IP69 |
| Operating Temperature |
-40°C to +65°C |
| Storage Temperature |
-40°C to +85°C |
| Dimensions (L x W x H) |
34 mm x 97 mm x 96 mm |
| Weight |
300 g |
| MTBF |
81 years |
| MTTFd |
> 100 years |
| Certificates |
EU, UK, ACMA, China RoHS, cTUVus, Malaysia. |
| Application |
Outdoor & Indoor |
RMS2731C-636111 vs RMS2731C-636511 Comparison: Which Model to Choose?
Below is a detailed comparison between the two variants of the RMS2731C sensor:
| Criteria |
RMS2731C-636111 (RMS-A) |
RMS2731C-636511 (RMS-E) |
| Part Number |
1128853 |
1129087 |
| Measurement Principle |
FMCW Radar |
FMCW Radar |
| Frequency Band |
61 GHz … 61.5 GHz |
61 GHz … 61.5 GHz |
| Working Range |
0.4 m … 100 m |
0.4 m … 100 m |
| Scanning Range (1 m² RCS) |
50 m |
50 m |
| Distance Accuracy |
0.04 m |
0.04 m |
| Supply Voltage |
9 … 32 V DC |
9 … 32 V DC |
| Enclosure Rating |
IP67 / IP69 |
IP67 / IP69 |
| Operating Temperature |
–40 °C … +65 °C |
–40 °C … +65 °C |
| Radio Approval |
EU, UK, Vietnam, India, Australia, South Korea… |
USA (FCC), Canada, New Zealand, Taiwan |
Recommendation:
- Choose RMS2731C-636111 if your project is located in Vietnam, EU, or most Asian markets — this is the most common and suitable version for Vietnam.
- Choose RMS2731C-636511 if you need to export to the United States, Canada, or markets that require strict FCC/IC certification.
How Does FMCW Radar Compare to LiDAR Laser Scanners?
The RMS2731C-636111 uses Frequency-Modulated Continuous Wave (FMCW) technology, continuously transmitting radar signals at a varying frequency. The integrated processor analyzes the frequency difference between the transmitted and reflected signals to simultaneously determine the distance, azimuth angle, and velocity of detected objects.
Key advantage over LiDAR: While 2D laser scanners are susceptible to interference from rain, dust, and fog, SICK’s 61 GHz radar maintains full performance in all outdoor conditions. Field data indicates that 61 GHz FMCW radar experiences only a 10–15% reduction in detection range in heavy rain, compared to 60–70% for LiDAR.
Wide horizontal coverage: The ±60° horizontal aperture angle enables a single device to monitor a 120° sector. At 50 m range, this covers a detection arc approximately 100 m wide.
4 Independent Monitoring Zones – Configuration and Application
A defining feature of the RMS2731C-636111 is its support for up to 4 fully independent monitoring zones. Each zone can be individually configured in terms of size, shape, and output behavior via Ethernet connection using SICK’s SOPAS Engineering Tool.
Typical 4-zone configuration for AGV/forklift safety:
- Zone 1 – Early Warning (50–100 m): Activates warning lights or audible alarms
- Zone 2 – Speed Reduction (20–50 m): Commands AGV/forklift to reduce speed
- Zone 3 – Stop (5–20 m): Immediately halts all movement
- Zone 4 – Exclusion Zone (custom): Defined according to plant layout requirements
Based on AUMI’s engineering team experience deploying RMS2000 sensors at logistics facilities in Vietnam, this 4-zone configuration has reduced AGV collision incidents compared to traditional single-zone systems.
Industrial Applications: Where the RMS2731C-636111 Excels
Logistics & Automated Warehousing:
Monitoring AGV and forklift travel lanes in warehouses. With a 100 m range and 120° scan angle, a single sensor can cover an entire 30–40 m wide aisle. Radar is unaffected by dust from goods handling or high-intensity lighting conditions typical in large warehouses.
Gate Monitoring & Access Control:
Detection and classification of vehicles (trucks, cars, pedestrians) at factory gates. The 0.0625 m/s velocity accuracy enables determination of whether a vehicle is entering or leaving.
Outdoor Perimeter Surveillance:
With IP67/IP69 protection and an operating temperature range of -40°C to +65°C, the RMS2731C-636111 operates continuously 24/7 in harsh outdoor conditions — rain, extreme heat, and cold alike.
Frequently Asked Questions (FAQ)
Q: Can the RMS2731C-636111 replace a 2D LiDAR laser scanner?
A: It depends on the application. The RMS2731C-636111 outperforms LiDAR in outdoor, dusty, and wet environments. However, LiDAR offers better angular resolution (< 1°) for applications requiring detailed mapping, such as mobile robots (AMR). Contact AUMI for application-specific advice.
Q: Is the RMS2731C-636111 approved for use in Vietnam?
A: Yes. The product has official radio approval for Vietnam as listed in the SICK 2026 datasheet, requiring no additional licensing for deployment.
Q: What is the difference between RMS2731C-636111 and RMS2731C-636511?
A: Both models are technically identical. The only difference is radio certification: 636111 (Model RMS-A) is approved for EU, UK, Vietnam, and Asia; 636511 (Model RMS-E) is approved for USA (FCC), Canada, New Zealand, and Taiwan.
Q: How does the sensor connect to a Siemens or Mitsubishi PLC?
A: Via Ethernet (10/100 MBit/s) for parameterization and data output, or through the 4 digital outputs (OUT1–OUT4) connected directly to the PLC’s digital input terminals.
Q: Where can I buy the SICK RMS2731C-636111 in Vietnam?
A: AUMI is the authorized SICK distributor in Vietnam. Contact us at www.aumi.com.vn for the latest pricing and availability.
Purchase the SICK RMS2731C-636111 from AUMI – Authorized Distributor
📞 Hotline: 0917 991 589 (Hanoi) | 0932 226 100 (Ho Chi Minh City)
📧 Email: [email protected]
🌐 Website: https://aumi.com.vn/
📍 Offices:
- Hanoi: B44, Garden Lot, Viet Hung Urban Area, Long Bien
- Ho Chi Minh City: Floor 2, HS Building, 260/11 Nguyen Thai Binh, Tan Binh District
- Da Nang: Floor 9, PV Bank Building, No. 2 30-4 Street, Hoa Cuong Ward
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