1734-IB8S
1734-IB8S
Manufacturer: ALLEN BRADLEY
Condition: New and Unused, Surplus.
Overview of Allen Bradley 1734-IB8S
The Allen Bradley 1734-IB8S is a POINT Guard I/O Safety Discrete Input module designed for demanding industrial automation applications requiring safe, reliable digital input interfacing. As part of the POINT I/O product line, this compact DIN-rail mountable module offers eight current-sinking safety input channels and four current-sourcing pulse test outputs for robust safety circuit verification. Engineered for use with Safety Instrumented Systems (SIS) and PLC platforms like GuardLogix and SmartGuard, the 1734-IB8S supports both single- and dual-channel safety signal evaluation, helping achieve up to Safety Category 3 and 4 per IEC 61508 and 62061. Its advanced diagnostics, configurable discrepancy timing, and channel-specific ON/OFF delay adjustments minimize false trips and maximize uptime in safety-critical environments such as emergency stops, light curtains, and safety gates.
Key Features of Allen Bradley 1734-IB8S
- Eight (8) current-sinking safety digital inputs (11–30V DC, 3.5 mA typical)
- Four (4) configurable current-sourcing pulse test outputs for enhanced safety signal verification
- Supports dual-channel mode for high-integrity safety, enabling Category 3 and 4 applications
- Single-channel mode for Category 2 safety applications
- Individually adjustable ON/OFF signal delays per channel to filter noise and signal bounce
- Configurable discrepancy time for fault detection between channels
- Integrated external wiring short-circuit detection when using test outputs
- Compatible with GuardLogix and SmartGuard safety PLCs
- Direct installation onto POINT I/O DIN rail racks for flexible expansion
- Certified to global standards including CCC and CE, suitable for international deployments
Technical Specs of Allen Bradley 1734-IB8S
| Attribute | Specification |
|---|---|
| Input Type | 8x Current Sinking, 4x Pulse Output |
| Input Voltage Range | 11–30V DC |
| Input Current | 3.5 mA typical per channel |
| Response Time | 0.5 ms typical |
| Isolation | 50V continuous (basic insulation), no isolation between channels |
| Power Supply | 24V DC nominal, 19.2–28.8V DC range |
| Operating Temperature | -20°C to +55°C |
| Enclosure | Open-style, DIN-rail mount |
| Certifications | CE, CCC |
Applications / Use Case
The Allen Bradley 1734-IB8S is primarily used in industrial settings that demand robust safety signal processing, especially where compliance with international safety standards is required. Typical applications include emergency stop circuits, safety door interlock systems, light curtains, access gates, and any machine guarding application needing SIL2, SIL3, or Category 3/4 safety integrity. The module’s ability to verify wiring integrity via test pulses and its support for dual-channel signal checking make it a reliable choice for high-reliability safety systems in manufacturing, automotive, packaging, and material handling operations. When paired with GuardLogix controllers, the 1734-IB8S provides a scalable and cost-effective solution for distributed safety applications across your plant floor.
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