1756-OB8I Output Module Allen-Bradley

Allen-Bradley 1756-OB8I Isolated DC Output Module

Core Technical Specifications

• Brand: Allen-Bradley
• Series: ControlLogix
• Module Type: Isolated DC Output
• Output Points: 8 (Individually Isolated)
• Output Voltage Range: 10-30 Volts DC
• Maximum Current per Point: 2 Amps
• Surge Current: 4 Amps for 10 ms per point
• Off-State Leakage Current: 0.5 mA maximum per point
• On-State Voltage Drop: 0.5 VDC maximum at 2A
• Isolation Voltage: 250 Volts continuous (routine tested at 1350V AC)

Electrical & Power Characteristics

• Backplane Power Consumption: 0.89 Watts
• Current Draw (5.1V): 165 milliamps
• Current Draw (24V): 2 milliamps
• Maximum Power Dissipation: 4.6 Watts
• Thermal Dissipation: 15.7 BTU/hour
• Minimum Load Current: 2 mA
• Maximum Module Current: 16 Amps at 60°C (140°F)

Installation & Configuration

• Required Terminal Block: 1756-TBCH or 1756-TBS6H (36-pin, sold separately).
• Mounting: Install into a compatible ControlLogix chassis after grounding.
• Communication Formats: Supports Listen-Only Rack Optimization, Scheduled Output Data, and more.
• Fault State Programming: Configure each point individually for On, Off, or Hold Last State during faults.

Environmental & Operational Data

• Operating Temperature: Rated for performance up to 60°C (140°F).
• Protection Recommendation: Use a fused Input/Output Module (IFM) for output protection.
• Enclosure Rating: None (requires installation in a protective chassis).

Packaging & Shipping

• Condition: New and Original.
• Package Includes: 1756-OB8I module only. Terminal block ships separately.
• Shipping: We ship globally via DHL, FedEx, and UPS.
• Dispatch Time: We process and ship orders within 5 business days.
• Returns: We support a 30-day return policy for unused items.

Frequently Asked Questions (FAQ)

• Q: Are the eight outputs on the 1756-OB8I truly isolated?
  A: Yes, each of the 8 output channels is individually isolated, providing superior noise immunity and fault containment.
• Q: What is the actual operating voltage for this module?
  A: The 1756-OB8I operates within a wide 10-30 VDC range, making it compatible with standard 12V and 24V DC systems.
• Q: Do I need to buy anything else to use this module?
  A: You must purchase a compatible 36-pin removable terminal block, either 1756-TBCH or 1756-TBS6H.
• Q: How much current can each output point handle?
  A: Each point can handle a 2 Amp continuous load, with a higher surge capability for demanding loads like solenoids.
• Q: What happens to the outputs if the controller faults?
  A: You can configure the behavior per point to turn On, turn Off (default), or Hold its Last State during a controller fault.

Contact Information Inquiries: sales@nex-auto.com , +86 153 9242 9628

Partner NexAuto Technology Limited : https://www.nex-auto.com/