1734-OB8S 8-Channel Safety Output Module SIL3 | Allen-Bradley

The Original New Allen-Bradley 1734-OB8S 8-Channel Safety Output Module is a POINT Guard I/O safety device designed for SIL 3 / PLe rated machine safety systems requiring safety-rated sourcing outputs. It is part of the POINT Guard I/O™ safety architecture, engineered for integration with GuardLogix® controllers and CIP Safety™ over EtherNet/IP networks, providing reliable safety output control for critical machine functions.

Core Engineering Highlights:
SIL 3 (IEC 61508) | PLe / Cat.4 | CIP Safety over EtherNet/IP | 8-channel 24V DC sourcing outputs | 0.5 A per channel | <0.1 ms output delay

Key Features:

• Original New Allen-Bradley 1734-OB8S module

• 8-channel 24V DC safety sourcing outputs

• Single or dual-channel operation for flexible safety configuration

• 8 yellow output status LEDs + 2 green/red module/network status LEDs

• Configurable test pulse output for advanced diagnostic coverage

• Hot-swappable modular design for flexible maintenance

• Removal and Insertion Under Power (RIUP) support

• Auto Device Replacement (ADR) reduces downtime

• Compact 12 mm width for space-constrained panels

• DIN rail mounting, open-style enclosure (IP20)

• TÜV certified, UL and CE approved design

Applications:

• Emergency stop (E-Stop) systems

• Safety gate monitoring and interlock systems

• Safety contactor and relay control

• Light curtain safety integration

• Robotics safety zones

• Conveyor and packaging machinery safety control

• Industrial automation machine protection systems

Technical Specifications:

• Catalog Number: 1734-OB8S

• Module Type: POINT Guard I/O Safety Digital DC Sourcing Output Module

• Outputs: 8 (compatible with terminal bases with 8 terminations)

• Nominal Output Voltage: 24V DC

• Output Voltage Range: 10–28.8V DC

• Output Current (per channel): 0.5 A

• Output Delay Time (ON): 0.1 ms

• Output Delay Time (OFF): 1.0 ms

• Off-State Leakage Current: < 0.5 mA

• POINTBus Current: 75 mA max @ 5V DC

• Power Dissipation: 2.6 W max

• Thermal Dissipation: 8.9 BTU/hr max

• Isolation Voltage: 50V continuous, Basic Insulation Type

• Indicators: 8 yellow output status LEDs, 2 green/red module/network status LEDs

• Keyswitch Position: 1

• Terminal Base Compatibility: 1734-TB, 1734-TBS, 1734-TOP, 1734-TOPS, 1734-TOP3, 1734-TOP3S

• Dimensions (HxWxD): 56 x 12 x 75.5 mm (2.2 x 0.47 x 2.97 in.)

• Weight: 31.8 g (1.12 oz)

• Enclosure Type: Open-style (IP20)

• Mounting: DIN Rail

• Operating Temperature: –20°C to +55°C

• Storage Temperature: –40°C to +85°C

• Max. Ambient Humidity (non-condensing): 5–95%

• Vibration Resistance: 5 g @ 10–500 Hz

• Shock Resistance: 30 g operational, 50 g non-operational

• Certifications: CE, UL, cUL, Class I Div 2, ATEX Zone 2

• Country of Origin: USA

System Compatibility:

• Rockwell Automation GuardLogix controllers

• Compact GuardLogix controllers

• SmartGuard 600 controllers

• POINT I/O EtherNet/IP adapters (1734-AENT, 1734-AENTR)

• POINT I/O backplane systems

• EtherNet/IP industrial networks

• CIP Safety-enabled safety architectures

Related Products:

• 1734-AENTR – EtherNet/IP adapter for distributed POINT I/O systems

• 1734-TB – Terminal base for field wiring (screw type)

• 1734-TBS – Terminal base for field wiring (spring clamp)

• 1734-TOP – One-piece mounting base for field wiring

• 1734-IB8S – 8-channel safety input module for sensor monitoring

• 1734-IE4S – 4-channel safety analog input module for process signals

• 1734-OB8SK – Conformal coated version for harsh environments

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Allen-Bradley, POINT Guard I/O, GuardLogix, and CIP Safety are trademarks of Rockwell Automation.