The ABB SM812 (article number 3BSE072270R1) delivers intelligent supervision for controllers during non-SIL and SIL1-2 operations. When paired with a PM867 controller, this module forms a 1oo2 diverse structure for SIL3 applications. For high availability systems, you can use redundant SM812 modules alongside any two redundant CPUs. The 3BSE072270R1 includes a dedicated synchronization link that synchronizes active and redundant SM units. This link copies data between two SM812 modules during hot-insert and online upgrade situations. Additionally, the module has a connector with three digital inputs and two digital outputs for safety-related I/O. Note that these are not process I/O.
The ABB SM812 offers several powerful features for safety applications. First, it uses an MPC866 microprocessor running at 133 MHz. This provides ample processing power for supervision tasks. Additionally, the module includes 64 MB of RAM for data handling. It supervises PM857, PM863, and PM867 controllers during SIL1-2 operations.
For SIL3 applications, the 3BSE072270R1 works together with these controllers to form a 1oo2 diverse architecture. Over voltage monitoring protects the system from power anomalies. Internal voltage monitoring adds another layer of protection. Moreover, the SM812 supports hot swap for easy replacement. Redundancy is fully supported. The SM Link enables synchronization of redundant pairs.
The ABB SM812 has a switchover time of maximum 10 ms in redundant configuration. Flash PROM for firmware storage is 4 MB. The module requires a 24 V DC power supply (range 19.2-30 V DC). Typical power consumption at +24 V is 160 mA. Maximum consumption reaches 250 mA. Power dissipation is 3.8 W. Flash memory for storage is not available on this module. Performance metrics depend on the connected controller.
For physical attributes, width measures 59 mm (2.9 inches). Height is 186 mm (7.3 inches). Depth reaches 127.5 mm (5.0 inches). Total weight including base is 0.7 kg (1.5 lbs).
The SM812 operates in industrial environments with multiple certifications. Operating temperature ranges from +5 to +55°C (+41 to +131°F). Storage temperature spans -40 to +70°C (-40 to +158°F). Temperature changes must not exceed 3°C per minute per IEC/EN 61131-2. Pollution degree is Degree 2 according to the same standard.
Corrosion protection meets G3 compliance with ISA 71.04. Relative humidity operates from 5 to 95% non-condensing. Emitted noise stays below 55 dB(A). Vibration resistance follows three ranges: 10-50 Hz at 0.0375 mm amplitude; 50-150 Hz at 0.5 g acceleration; and 5-500 Hz at 0.2 g acceleration.
Rated isolation voltage is 500 V a.c. Dielectric test voltage is 50 V. Protection class is IP20 according to EN 60529 and IEC 529. Maximum altitude is 2000 m per IEC/EN 61131-2. Emission and immunity follow EN 61000-6-4 and EN 61000-6-2.
The 3BSE072270R1 holds a CE Mark for European compliance. Electrical safety meets EN 50178, IEC 61131-2, UL 61010-1, and UL 61010-2-201. For hazardous locations, it carries cULus Class 1, Zone 2, AEx nA IIC T4, Ex nA IIC T4Gc X certification. Marine certificates include ABS, BV, and DNV-GL (LR and Lloyd pending). TUV approval is confirmed. RoHS compliance follows EN 50581:2012. WEEE compliance adheres to DIRECTIVE/2012/19/EU.
The prime function of the ABB SM812 is supervision. During non-SIL operations, it monitors controller health passively. For SIL1-2 operations, it provides active oversight. However, the most critical application involves SIL3. Here, the SM812 pairs with a PM857, PM863, or PM867 controller. Together they form a 1oo2 diverse architecture. This means two different channels perform the same safety function. One channel is the main controller. The other is the 3BSE072270R1 supervisor. Diversity reduces common cause failures.
For high availability systems, redundant SM812 modules work together. They can pair with any two redundant CPUs. The dedicated synchronization link keeps both SM units aligned. This allows hot-insert and online upgrades without system downtime. Data copies between the two SM812 modules during these operations. Meanwhile, the three digital inputs and two digital outputs handle safety-related digital I/O. Do not use these for standard process I/O.
Installing the ABB SM812 requires careful planning. First, power down the controller rack completely. Next, mount the module onto its base plate. Secure it firmly in place. Then, connect the dedicated synchronization link between redundant SM812 units if used. For SIL3 applications, verify the PM867 or compatible controller is installed.
Connect the power supply to the 24 V DC terminals. Ensure voltage stays within 19.2-30 V DC range. Wire the three digital inputs and two digital outputs as needed. Remember these are safety-related, not process I/O. For redundant configurations, verify both 3BSE072270R1 modules have identical firmware. Finally, power up the system. Perform a full diagnostic check before placing the system into operation.
ABB SM812 safety supervisor module (1 piece, 3BSE072270R1)
Base plate for mounting
Synchronization link cable (for redundant setups)
Connector for digital I/O (3 DI, 2 DO)
*Note: No certificate of conformity or warranty card is included. No 12-month guarantee document is provided.*
We ship using FedEx, UPS, or DHL. The gross weight per package is 0.7 kg. Each box contains one module with its base. Delivery typically takes 3–7 business days. Tracking numbers are sent after dispatch. Customs clearance is the buyer's responsibility.
1. Can I use the SM812 without a PM867 controller?
Yes, the ABB SM812 also works with PM857 and PM863 controllers. For SIL3 applications, pairing with any of these three models forms the required 1oo2 diverse structure.
2. What is the switchover time when one SM812 fails?
Switchover time in redundant configuration is maximum 10 ms. The 3BSE072270R1 transfers control quickly to maintain system availability.
3. Are the three digital inputs and two digital outputs for process control?
No, these are safety-related digital I/O only. Do not use them for standard process I/O. They serve specific safety supervision functions within the SM812.
4. Does the SM812 store any application data?
The ABB SM812 has 64 MB RAM for runtime operations. However, it has no flash memory for long-term storage. Application data resides in the connected controller.
5. What happens during hot-insert of a redundant SM812?
The dedicated synchronization link copies data between the two SM812 modules. This ensures seamless takeover. The system continues operating without interruption during online upgrades.
| Brand Name | ABB |
| Model No. | SM812 |
| Product Type | Safety Supervisor Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
