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Description
Application Scenarios:In a multi-axis robotic cell within an automotive assembly plant, a complex safety system was required. Each of the six servo drives needed a certified Safe Torque Off (STO) input, triggered by a combination of a perimeter light curtain, an E-Stop button, and internal robot controller safety signals. The initial design called for a tangled web of individual wires from each safety device to each drive’s safety terminal, plus separate 24VDC power feeds. This created a commissioning nightmare and a maintenance headache, with points of failure difficult to trace. The solution was to install a centralized ABB SAfT167APC Connection Board in the main control cabinet. This board provided a clean, terminal-block interface. The light curtain and E-Stop signals were wired once to the board’s inputs. The board then distributed these validated safety signals and the required 24VDC power to all six drives via pre-defined, labeled output channels. The SAfT167APC acted as the organized “central nervous system” for the cell’s safety, reducing wiring by over 60%, slashing commissioning time, and creating a clear, auditable wiring diagram that simplified future troubleshooting and modifications. It turned a complex, error-prone wiring task into a streamlined, reliable installation.
Parameter:
| Main Parameter | Value / Description |
|---|---|
| Product Model | ABB SAfT167APC (SAfT 167 APC) |
| Manufacturer | ABB |
| Product Category | Safety Connection & Power Distribution Board |
| Primary Function | Interface and distribution board for safety signals and control power. |
| Input Channels | Terminals for connecting master safety signals (e.g., from safety relay, PLC). |
| Output Channels | Multiple output channels to distribute signals/power to individual drive safety inputs. |
| Power Distribution | Distributes 24 VDC power to connected drive safety circuits. |
| Wiring Interface | High-quality, clearly labeled screw terminal blocks for secure connections. |
| Mounting | Designed for DIN-rail or panel mounting within a drive or system cabinet. |
| Compatibility | Designed for use with ABB drives featuring integrated safety (STO) inputs. |
| Safety Standard Support | Facilitates wiring compliant with relevant safety standards (e.g., IEC 60204-1). |
Technical Principles and Innovative Values:
- Innovation Point 1: Centralized Signal & Power Consolidation. The ABB SAfT167APC‘s core innovation is the consolidation of two critical functions. First, it aggregates multiple safety input signals (which are often low-current) onto a single, robust terminal block. Second, it takes a single, fused 24VDC power feed and distributes it cleanly to multiple outputs. This eliminates the need for separate terminal blocks, power taps, and daisy-chained wiring, which are common sources of poor connections and voltage drops in distributed safety systems. It ensures all connected drives receive an identical, clean signal and power source.
- Innovation Point 2: Structured Wiring for Enhanced Safety Integrity. By providing a dedicated, labeled board for all safety connections, the SAfT167APC enforces a structured wiring methodology. This prevents the commingling of safety wires with standard control wires, reducing the risk of cross-talk or accidental disconnection. The clear physical layout corresponds directly to the electrical schematic, making verification during commissioning and future audits significantly easier. This structured approach directly supports the principles of functional safety by reducing systematic errors during installation.
