1756-OF8H | Allen-Bradley ControlLogix 8-Channel Analog Output Module With HART and 15–16 Bit Resolution

Allen-Bradley · HMIs & Displays

Description The Allen-Bradley 1756-OF8H is an eight-channel analog output module designed for ControlLogix systems, supporting both voltage and current output configurations. Each channel is configurable for 0–20 mA, 4–20 mA, or ±10 VDC signals, with high resolution ranging from 15 to 16 bits. The module includes an integrated HART modem for advanced device communication, making it ideal for process applications requiring precision output control and field instrument diagnostics.     Technical Specifications Condition New/Never Used Surplus Brand Allen-Bradley Category Analog Output Module Part Number 1756-OF8H Subcategory ControlLogix Analog Output With HART Series ControlLogix Manufacturer Rockwell Automation Module Type Analog Output Module (HART-capable) Number of Outputs 8 Differential Channels Output Signal Types 0–20 mA, 4–20 mA, ±10 VDC Resolution 15–16 Bits Accuracy Voltage: 0.1% of range; Current: 0.5% of range Data Format Integer (left-justified, 2's complement), IEEE 32-bit float Conversion Method R-Ladder DAC Isolation Voltage 50 V Continuous Overvoltage Protection ±24 VDC Open Circuit Detection Current outputs (<0.1 mA) Backplane Current (5.1 VDC) 230 mA Backplane Current (24 VDC) 230 mA Terminal Blocks 1756-TBNH, 1756-TBSH Enclosure Type Open Operating Temperature 0–60°C Thermal Dissipation 16.78 BTU/hr Power Dissipation 4.92 W Application Process control, HART instrumentation, analog output systems     Information About 1756-OF8H The 1756-OF8H is a ControlLogix analog output module that provides eight differential output channels with support for both current and voltage signal ranges. Designed with R-Ladder DAC conversion and IEEE 32-bit floating-point formatting, it delivers accurate, monotonic output with no missing codes. The module integrates a HART modem, enabling communication with smart field devices while maintaining fast output response. Installed in any ControlLogix chassis, the 1756-OF8H uses a removable terminal block (1756-TBNH or 1756-TBSH) for secure wiring and supports module-level isolation between the outputs and backplane. Key Features Eight configurable outputs: Supports 0–20 mA, 4–20 mA, and ±10 VDC per channel. Integrated HART modem: Enables communication with smart transmitters and field instruments. High-resolution output: Provides 15–16 bit resolution for precise analog signal control. R-Ladder DAC architecture: Ensures monotonicity and reliable digital-to-analog conversion. 50V continuous isolation: Protects the backplane from output-side electrical disturbances. Open-circuit detection: Detects wiring faults on current outputs below 0.1 mA. Removable terminal block support: Compatible with 1756-TBNH and 1756-TBSH for simplified wiring. ControlLogix system integration: Installs in a single chassis slot for local or remote I/O placement. The 1756-OF8H delivers the reliability and precision required for process automation, analog control, and HART-enabled instrumentation systems.

Brand: Allen-Bradley · Category: HMIs & Displays

Key features

• Eight configurable outputs: Supports 0–20 mA, 4–20 mA, and ±10 VDC per channel.
• Integrated HART modem: Enables communication with smart transmitters and field instruments.
• High-resolution output: Provides 15–16 bit resolution for precise analog signal control.
• R-Ladder DAC architecture: Ensures monotonicity and reliable digital-to-analog conversion.
• 50V continuous isolation: Protects the backplane from output-side electrical disturbances.
• Open-circuit detection: Detects wiring faults on current outputs below 0.1 mA.
• Removable terminal block support: Compatible with 1756-TBNH and 1756-TBSH for simplified wiring.
• ControlLogix system integration: Installs in a single chassis slot for local or remote I/O placement.

Specifications

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