Description
ABB PP845 3BSE042235R1
Technical Specifications:
- Order Code: 3BSE042235R1.
- Safety Integrity Level: SIL 3 (IEC 61508) and Category 4 / PL e (EN ISO 13849-1).
- Input Channels: 10 dual-channel inputs (for SIL 3) or 20 single-channel inputs (for SIL 2).
- Signal Type: HTL (High Threshold Logic) with optical isolation.
- Voltage Range: 0-5 V DC (“0”), 11-30 V DC (“1”).
- Max Cable Length: 2000 meters (shielded twisted pair).
Functional Features:
- High-Integrity Monitoring: Continuously monitors input channels for wire breaks, short circuits, and cross-wiring.
- Redundant Processing: Dual-channel architecture allows for safe voting logic in critical applications.
- Status Indication: 20 green LEDs for individual channel status, plus power and fault LEDs.
- Power Protection: Built-in overvoltage and reverse polarity protection.
Application Scenarios:
- Emergency Stop (E-Stop) button signal acquisition.
- Safety door interlocks and light curtain monitoring.
- High-Integrity Pressure Protection Systems (HIPPS).
- Burner Management Systems (BMS).
Performance Parameters:
- Power Consumption: Typical 4 mA per channel, 110 mA total module current.
- Response Time: Fast digital signal processing for immediate safety actions.
- Isolation: Galvanic isolation between inputs and the internal bus.
Material Composition & Structural Characteristics:
- Form Factor: Standard 35 mm DIN rail or AC 800M backplane mountable module.
- Terminals: Secure screw terminals for field wiring.
- Components: Industrial-grade optocouplers and precision resistors.
Working Principle:
The module receives discrete 24V DC signals from safety field devices. The internal circuitry isolates and conditions the signals, checking for dual-channel agreement (in SIL 3 mode). Validated safe states are communicated to the safety PLC via the internal bus, triggering protective actions if a fault or unsafe condition is detected.
Installation Requirements:
- Wiring: Use shielded twisted-pair cables for all safety inputs to prevent electromagnetic interference.
- Grounding: Ensure proper cabinet grounding to maintain EMC compliance.
- Configuration: Configure channel diagnostics and safety parameters in the safety engineering tool.
Usage Precautions:
- Safety Critical: Never bypass safety diagnostics or force inputs during normal operation.
- Testing: Perform regular proof tests as defined by the safety manual to maintain SIL rating.
- Replacement: Replace only with identical or certified equivalent safety modules.
