Overview
The Allen-Bradley 1734-IB8S Series B is a safety-rated digital input module engineered for industrial PLC systems requiring certified safety functionality. This 1734-IB8S module delivers eight sinking input channels at 24VDC, designed for integration with CompactLogix controllers and POINT I/O distributed I/O networks. The safety certification provides confidence in critical automation applications where input signal integrity is essential to system reliability.
Key Features
- 8 channels of safety-rated sinking digital inputs at 24VDC
- Operates across 11 to 28.8VDC input voltage range for flexible field wiring
- TUV General Safety and IECEx certified for compliance in regulated environments
- IP20 protection rating suitable for panel-mount and DIN-rail installation
- Integrated POINTBus connectivity for seamless CompactLogix system integration
Technical Specifications
- Input Channels: 8 channels, safety-rated sinking configuration
- Input Voltage (Nominal): 24VDC
- Input Voltage Range: 11 to 28.8VDC
- Nominal Input Current: 4mA (nominal), 2 to 5mA operating range
- Off-State Voltage: Maximum 5VDC
- POINTBus Power (5V): Maximum 75mA
- Isolation Voltage: 50VDC continuous
- Power Dissipation: 1.6W (typical)
- Protection Rating: IP20
- Mounting: DIN rail or panel-mount terminal block with bus connector
- Certifications: TUV General Safety, IECEx, Eurasian Economic Community Safety
- Series: POINT I/O (Bulletin 1734), Series B
- Manufacturer Part Number: 1734-IB8S (PN-25132)
Typical Applications
- Safety-critical machinery control requiring certified input sensing
- Distributed I/O in modular automation systems
- Emergency stop chains and interlock circuits
- Sensor input aggregation in CompactLogix-based systems
- Plant-wide digital signal collection via POINT I/O networks
Compatibility & Replacements
Compatible With
- CompactLogix controllers (L16, L18, L24, L27)
- POINT I/O distributed I/O networks (Bulletin 1734)
- POINTBus communication interface
- Studio 5000 Logix Designer software (RSLogix 5000)
- Allen-Bradley terminal blocks and power supplies (24VDC)
Replaces / Drop-In Replacement For
- 1734-IB8S Series A (earlier versions)
- Previous generation safety input modules in POINT I/O family
Works With
- Studio 5000 Logix Designer engineering environment
- Add-On Profiles (AOP) for module configuration
- EtherNet/IP networks via CompactLogix gateway
- Modbus TCP (when used with gateway devices)
- Allen-Bradley RSLogix programming and diagnostics tools
