Allen Bradley 1756-OF8H Analog Output Module

The AB 1756-OF8H is an 8-channel analog output module with integrated HART communication, designed for use in ControlLogix systems. It provides precise analog output in either current or voltage formats, while also supporting HART protocol for field device configuration, diagnostics, and calibration over the same wiring used for analog signals.

Ideal for advanced process control applications, the 1756-OF8H allows simultaneous analog signal transmission and digital communication, making it perfect for smart instrumentation environments. With a 15-bit resolution and ControlLogix chassis compatibility, this module delivers high accuracy and control flexibility.

Technical Specifications

Model: 1756OF8H
Series: ControlLogix
Type: Analog Output Module with HART
Channels: 8 Analog Outputs
Signal Type: Current / Voltage
Output Ranges:
– Current: 0…20 mA, 4…20 mA
– Voltage: ±10V, 0…10V
Resolution: 15-bit
HART Support: Yes – all channels
Application: Process automation, instrumentation control, smart transmitter output

Electrical Specifications

Backplane Supply Voltage: 5.1 V DC and 24 V DC (from ControlLogix chassis)
Output Type: Current or Voltage (software-selectable)
Output Accuracy: ±0.1% full scale typical
Output Load (Current): 0…1000 Ω
Output Load (Voltage): ≥1 kΩ
Update Rate: Channel-dependent
Output Protection: Short-circuit and overvoltage protected
HART Communication:
– Compatible with HART 5, 6, and 7
– Supports up to 15 devices
Power Dissipation: Approx. 5.5 W

Mechanical Specifications

Width: 38.1 mm
Height: 300 mm
Depth: 111.25 mm
Mounting Type: ControlLogix chassis slot
Connection Type: 20-pin plug-in terminal block
Installation Orientation: Vertical
Rack Assembly Possible: Yes
Weight: Approx. 450 g
Explosion Safety (Gas/Dust): Not rated
Front Installation Possible: Yes

Environmental Specifications

Operating Temperature: 0…60 °C
Storage Temperature: –40…85 °C
Relative Humidity: 5% to 95% non-condensing
IP Rating: IP20
Vibration Resistance: IEC 60068-2-6
Shock Resistance: IEC 60068-2-27
Certifications: CE, c-UL-us, ATEX (when installed in suitable enclosure), RoHS
Use in Commercial Environments: Permitted with appropriate enclosure

Compliance & Communication

Backplane Protocol: ControlLogix bus
Network Protocols: HART (via analog signal)
Diagnostics: Channel-level fault detection and HART diagnostics
Redundancy Support: Yes, when used with supported ControlLogix redundancy systems
Programming Software: Studio 5000 Logix Designer
Configuration Tools: Field Device Manager (FDM), AssetCentre, HART handhelds

Key Features & Benefits

✅ 8 Analog Outputs with HART – Supports simultaneous analog signal and HART digital communication on every channel

✅ Flexible Signal Types – Voltage or current selectable per channel to match field device requirements

✅ High Accuracy and Resolution – 15-bit resolution for precise analog control

✅ ControlLogix Integration – Seamlessly fits into ControlLogix racks for scalable automation systems

✅ Smart Instrumentation Support – Enables advanced diagnostics and remote device configuration

📦 Order the Allen Bradley 1756-OF8H from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 1756-OF8H prices. While this model is currently out of stock, our sourcing experts can provide lead time information or suggest equivalent HART-enabled alternatives for your process control systems.

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