1756-OF8 8-Channel Analog Output Module ±10V/0-20mA | Allen-Bradley

The Original New Allen-Bradley 1756-OF8 8-Channel Analog Output Module is a non-isolated analog output module for the ControlLogix platform, designed for high-density analog signal generation in industrial automation systems. Each of the 8 channels is individually configurable for voltage (±10V DC) or current (0-20 mA) outputs, providing flexibility for a wide range of actuator and process control applications. Fully compatible with ControlLogix controllers and Studio 5000 Logix Designer® environment.

Core Engineering Highlights:
8 configurable analog output channels | ±10V DC or 0-20mA per channel | 15-bit resolution (320 µV/bit at 10.4V, 650 nA/bit at 21mA) | Electronic overcurrent and short-circuit protection | Open-circuit detection (current mode) | Fast settling time <2ms to 95% final value | 0-60°C operating temperature | Active product

Key Features:

• Original New Allen-Bradley 1756-OF8 module

• 8 single-ended analog output channels, configurable individually

• Voltage output: ±10.4V DC (nominal ±10V)

• Current output: 0-21 mA (nominal 0-20 mA)

• 15-bit resolution for high-precision analog control

• R-2R ladder DAC conversion method with monotonicity and no missing codes

• Electronic overcurrent and short-circuit protection

• Open-circuit detection for current outputs

• Electronic, software-configurable module keying

• Producer/consumer model communication

• Module fault reporting and onboard data alarming

• Factory calibrated – no field calibration required

• 20-pin Removable Terminal Block (RTB) compatible: 1756-TBNH, 1756-TBSH

• Chassis mounting for ControlLogix system

• Open-style enclosure (IP20 equivalent)

Applications:

• Process control analog signal generation

• Speed reference for variable frequency drives

• Valve and actuator positioning control

• Motion control systems

• Data acquisition and distributed control architectures

• General industrial automation and machine control

• Automotive manufacturing production lines

Technical Specifications:

• Catalog Number: 1756-OF8

• Product Family: ControlLogix Analog I/O

• Product Type: Analog Output Module (Non-isolated, Single-ended)

• Outputs: 8 single-ended channels

• Output Voltage Range: ±10.4V DC (±10V nominal)

• Output Current Range: 0-21 mA (0-20 mA nominal)

• Resolution: 15 bits (320 µV/bit at 10.4V, 650 nA/bit at 21mA)

• Nominal Accuracy @ 25°C: ±0.05% of full scale (4-21 mA / -10.4 to 10.4V)

• Settling Time: <2 ms to 95% of final value (resistive load)

• Conversion Method: R-2R ladder DAC, monotonic, no missing codes

• Scan Time (Integer Mode): 8 ms

• Scan Time (Floating Point Mode): 12 ms

• Backplane Current (5.1V): 150 mA max

• Total Backplane Power: 5.8 W

• Power Dissipation: 3.15-5.8 W (depending on load, 0-750Ω)

• Thermal Dissipation: 16.78 BTU/hr

• Isolation Voltage: 250V continuous, reinforced insulation, output-to-backplane

• Test Voltage: 1350V AC for 2 seconds

• Overvoltage Protection: 24V DC

• Short-Circuit Protection: Electronically limited to ≤21mA

• Open-Circuit Detection: For current outputs >0.1mA

• Data Format: Integer mode (left-justified, 2s complement), IEEE 32-bit floating point

• Removable Terminal Block: 1756-TBNH, 1756-TBSH

• Wire Size: 0.33-2.1 mm² (22-14 AWG) solid or stranded copper, 105°C rated

• Slot Width: 1

• Enclosure Type: None (open-style)

• Weight: Approx. 0.4 kg

• Operating Temperature: 0°C to 60°C

• Storage Temperature: –40°C to 85°C

• Relative Humidity: 5% to 95% non-condensing

• Certifications: CE, cULus, KC, MARINE, RCM, UL, ATEX, IECEx, FM Approved, CCC, UKCA

• North American Temperature Code: T4A

• IEC Temperature Code: T4

• Lifecycle Status: Active

• UPC: 612598171897

System Compatibility:

• Rockwell Automation ControlLogix controllers

• GuardLogix controllers

• 1756 ControlLogix chassis (any slot)

• Studio 5000 Logix Designer® application

• RSLogix 5000 programming software

Related Products:

• 1756-TBNH – 20-pin screw-clamp removable terminal block for 1756-OF8

• 1756-TBSH – 20-pin spring-clamp removable terminal block for 1756-OF8

• 1756-IF8 – 8-channel analog input module (non-isolated)

• 1756-IF16 – 16-channel analog input module

• 1756-OF8K – Conformal coated version for harsh environments

• 1756-PA72 / 1756-PB72 – ControlLogix power supplies

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Allen-Bradley, ControlLogix, and Studio 5000 are trademarks of Rockwell Automation.