1734-OB8E 8-Channel Digital Output Module 24V DC Sourcing | Allen-Bradley

The Original New Allen-Bradley 1734-OB8E 8-Channel Digital Output Module is a POINT I/O protected output device designed for high-density 24V DC sourcing output applications in distributed industrial automation systems. Featuring eight channels with individual electronic fusing and short-circuit protection, this module delivers reliable, robust control for actuators, solenoids, indicators, and other field devices. Its built-in diagnostic capabilities—including open-wire detection and overload status feedback—simplify troubleshooting and improve system uptime. Fully compatible with POINT I/O communication adapters and Rockwell Automation controllers.

Core Engineering Highlights:
8-channel 24V DC sourcing outputs | 0.5A per channel / 3A per module | Electronic fusing per channel | Short-circuit and overload protection | Open-wire detection | 0.1 ms ON / 1.0 ms OFF delay | Keyswitch position 1 | 75 mA POINTBus current | 2.0W power dissipation | -20°C to +55°C operating temperature

Key Features:

• Original New Allen-Bradley 1734-OB8E module

• 8 sourcing DC output channels (24V DC nominal)

• Electronic fusing per channel for individual overload protection

• Per-channel short-circuit protection

• Open-wire detection for simplified troubleshooting

• 0.1 ms ON delay, 1.0 ms OFF delay

• One group of 8 outputs

• Individual output status indicators

• Keyswitch position: 1

• Removable Terminal Block (RTB) compatible with 1734-TB and 1734-TBS

• DIN rail mounting, open-style enclosure

• Removal and Insertion Under Power (RIUP) support

• Auto Device Replacement (ADR) reduces downtime

• Conformal coated version available for harsh environments (1734-OB8EK)

• Modular design with independent I/O, termination style, and network interface selection

Applications:

• Actuator and solenoid control in machine automation

• Indicator lamp and alarm signaling

• Conveyor and material handling systems

• Packaging machinery output control

• Distributed I/O systems with POINT I/O adapters

• General factory automation and machine control panels

• Applications requiring diagnostic feedback for improved system reliability

Technical Specifications:

• Catalog Number: 1734-OB8E

• Product Family: POINT I/O Digital DC Output Modules

• Product Type: Protected Source Output Module

• Outputs: 8 (1 group of 8, sourcing)

• Nominal Output Voltage: 24V DC

• Output Voltage Range: 10-28.8V DC

• Output Current (per channel): 0.5 A

• Output Current (per module): 3 A

• Surge Current: 2 A for 10 ms, repeatable every 3 s

• Off-State Leakage Current: < 0.5 mA

• Output Delay: 0.1 ms (ON), 1.0 ms (OFF)

• Electronic Protection: Per-channel electronic fusing, short-circuit protection

• Diagnostics: Open-wire detection, overload detection

• POINTBus Current: 75 mA @ 5V DC

• Power Dissipation: 2.0 W - 2.6 W

• Thermal Dissipation: 6.8 BTU/hr

• Isolation Voltage: 50V continuous, Basic Insulation Type

• Keyswitch Position: 1

• Terminal Base Compatibility: 1734-TB, 1734-TBS

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

• Weight: Approx. 0.04 kg

• 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: 5% to 95% non-condensing

• Vibration: 5 g @ 10-500 Hz

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

• Certifications: CE, cULus, KC, RCM, UL, Class I Div 2, ATEX Zone 2

System Compatibility:

• Rockwell Automation POINT I/O communication adapters (1734-AENT, 1734-AENTR, 1734-ADN)

• POINT I/O backplane systems

• ControlLogix, CompactLogix, and GuardLogix controllers

• EtherNet/IP, ControlNet, and DeviceNet networks

• 1734-TB / 1734-TBS terminal base assemblies

• Studio 5000 Logix Designer® application with Add-on Profiles

Related Products:

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

• 1734-TB – Terminal base for field wiring (screw type, 8-pin)

• 1734-TBS – Terminal base for field wiring (spring clamp, 8-pin)

• 1734-TOP – One-piece mounting base (screw type, 8-pin)

• 1734-TOPS – One-piece mounting base (spring clamp, 8-pin)

• 1734-OB8EK – Conformal coated version for harsh environments

• 1734-IB8 – 8-channel digital input module for sensor signals

• 1734-OB8 – 8-channel digital output module (standard sourcing, 1A per channel)

• 1734-OB8S – 8-channel safety output module (SIL 3 / PLe)

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