Allen-Bradley 1756-OF8I Analog Output Module

Allen-Bradley 1756-OF8I ControlLogix Analog Output Module

Key Technical Specifications

• Brand: Allen-Bradley
• Model: 1756-OF8I
• Series: ControlLogix Isolated Analog Output Module
• Output Channels: 8 individually isolated points
• Voltage Output Ranges: -10 to 10V, 0 to 10V, 0 to 5V
• Current Output Range: 0-20 mA, 4-20 mA
• Resolution: 16-bit across all ranges
• Data Format: IEEE 32-bit floating point
• Conversion Method: R-Ladder DAC, monotonic
• Calibration Accuracy: 0.05% with 0.1% module error

Output Performance & Protection

• Output Impedance: 46 Ohms for current outputs
• Drive Capability: 0-1000 Ohms (current), >1000 Ohms (voltage)
• Open Circuit Detection: Available for current outputs
• Short Circuit Protection: Provided for voltage outputs
• Overvoltage Protection: ±30V DC for both modes
• Isolation Voltage: 50V continuous between channels
• Module Update Time: 1ms per module

Power Requirements & Compatibility

• Backplane Current: 200mA @ 5.1V DC, 275mA @ 24V DC
• Power Dissipation: 6.5 Watts typical
• Thermal Dissipation: 18.4 BTU/hr in current mode
• Chassis Compatibility: All 1756 ControlLogix chassis
• Mounting: Any available slot in the rack
• Terminal Blocks: 1756-TBNH, 1756-TBSH, 1756-TBCH

Environmental Specifications

• Operating Temperature: 0 to 60°C (32 to 140°F)
• Relative Humidity: 5-95% non-condensing
• Operating Shock: 30G withstand capability
• Enclosure Type: None (requires chassis mounting)
• Isolation Test: 1500V AC / 2300V AC for 60 seconds

Resolution & Signal Details

• Voltage Resolution: 0.32 mV/count (±10V), 0.16 mV/count (0-10V), 0.08 mV/count (0-5V)
• Current Resolution: 0.32 µA/count (0-21 mA range)
• Signal Types: Voltage and current outputs per channel
• Channel Configuration: Each channel individually configurable
• Output Forcing: Supported for commissioning and testing

Installation & Applications

• Install in any slot of 1756 ControlLogix chassis
• Supports local and distributed I/O applications
• Ideal for driving valves, actuators, and analog devices
• Suitable for critical process control applications
• Works in processor rack or remote I/O configurations
• Communicates via ControlLogix backplane or network modules

Frequently Asked Questions (FAQ)

How many output channels does the 1756-OF8I have?

• The 1756-OF8I provides eight completely isolated analog output channels. Each channel operates independently from the others for maximum flexibility.

What types of signals can this module output?

• This versatile module outputs both voltage and current signals. Choose from -10 to 10V, 0 to 10V, 0 to 5V voltage ranges or 0-20 mA current signals.

What is the resolution of the analog outputs?

• The 1756-OF8I delivers 16-bit resolution across all output ranges. This high resolution ensures precise control for critical applications.

Can I use this module in a remote I/O rack?

• Yes, the module works in both local and distributed applications. Install it in any 1756 chassis with the appropriate communication module.

What protection features does the module include?

• The module provides open-circuit detection for current outputs and short-circuit protection for voltage outputs. It also includes ±30V DC overvoltage protection.

What is the product condition and delivery time?

• We supply brand new, genuine Allen-Bradley products. We process orders within 5 business days using reliable carriers including DHL, FedEx, and UPS.

For technical specifications and pricing information, please contact our sales team.
Contact: sales@nex-auto.com