WhatsApp:+86 18150087953 WeChat: +86 18150087953 
Email：
Application Scenarios:
In a pharmaceutical cleanroom, a complex filling and capping line is controlled by an ABB AC800M PLC (PM582). The line runs 24/7, executing intricate batch recipes. During a scheduled facility-wide electrical shutdown for maintenance, the control cabinet’s main power is cut. Without protection, the PLC’s RAM would lose all data within milliseconds, erasing the active recipe, production counters, and machine states. However, the CPU is equipped with the ABB SB808F 3BDM000199R1 buffering battery. As main power disappears, this battery automatically takes over, providing a tiny but critical trickle of current to the RAM chips, preserving every bit of data. When power is restored four hours later, the PLC does not start from a cold, empty state. Instead, it reads the preserved memory from the SB808F-backed RAM, instantly recognizing its last state, resuming the interrupted batch from the exact point it stopped, and displaying the correct production counts. This seamless recovery prevents the loss of a high-value batch, avoids a lengthy manual restart procedure, and eliminates the risk of starting with a default, potentially unsafe program. The SB808F battery acted as an uninterrupted lifeline for the controller’s intelligence.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | ABB SB808F (Ordering Code: 3BDM000199R1) |
| Manufacturer | ABB |
| Product Category | Controller Backup Battery / Memory Buffering Battery |
| Compatible Modules | ABB AC800M PM581, PM582, PM583, PM584, PM585, PM586, PM587 CPU Modules |
| Battery Type | Lithium Thionyl Chloride (Li-SOCl₂) – Non-rechargeable, primary cell. |
| Nominal Voltage | 3.6 V |
| Capacity | High capacity (e.g., 1.2 Ah or similar) for extended backup duration. |
| Primary Function | Data retention for CPU RAM during power loss or module removal. |
| Backup Duration | Typically rated to retain data for a minimum of 1-2 years at 25°C with a fully charged CPU capacitor, and for several weeks during a total power loss, depending on RAM size and ambient temperature. |
| Physical Form | Pack of 2 individual battery cells, required to be installed in the CPU module’s battery holder. |
| Installation | User-replaceable; slides into a dedicated compartment on the front of the AC800M CPU module. |
| Temperature Range | Designed for industrial operating temperatures. |
| Safety & Compliance | Built-in safety vent, complies with relevant transportation and safety standards. |
- Note on Capacity & Duration: The battery’s role is not to power the CPU, but to provide micro-ampere current solely to the RAM. Its high capacity ensures data retention for months or years, far exceeding the hold-up time of the CPU’s main capacitors (which are typically seconds/minutes).
- Note on Two-Pack Requirement: AC800M CPUs require two batteries in series to provide the necessary voltage. The SB808F 3BDM000199R1 is supplied as the required pair, ensuring proper voltage and matched performance.
