Allen-Bradley - 1756-OF8IK Analog Output Module

Allen-Bradley 1756-OF8IK Isolated Analog Output Module

Core Technical Specifications

• Brand & Manufacturer: Allen Bradley
• Series: ControlLogix
• Model Number: 1756-OF8IK
• Module Type: Isolated Analog Output Module
• Output Channels: 8 Isolated Current Outputs
• Output Signal Range: 0-20 mA or 4-20 mA
• Voltage Output Range: -10 to +10 VDC (also supported)
• Resolution: 15-16 bits
• Output Impedance: 46 Ohms (Voltage mode)

Electrical & Power Characteristics

• Current Draw (24V DC): ~400 milliamps (typical)
• Current Draw (5.1V DC): 200 milliamps
• Backplane Power (Voltage Mode): 6.3 Watts
• Backplane Power (Current Mode): 6.3W to 10.2W (depending on load: 250-1000 Ω)
• Power Dissipation: 6.5 Watts
• Output Supply Voltage: 5-30 Volts DC
• Drive Capability (Current Mode): 0 to 1000 Ohms

Installation & Protection Features

• Required Terminal Block: 36-pin 1756-TBCH or 1756-TBS6H (sold separately).
• Wire Specification: 22 to 14 AWG shielded copper wire (90°C rating).
• Isolation Voltage: 50 Volts continuous.
• Overvoltage Protection: -30 to +30 Volts.
• Diagnostics: Short-circuit detection and open-circuit detection.
• Conformal Coating: Yes, for protection in harsh environments.
• Data Format & Conversion: IEEE 32-bit floating point, R-Ladder DAC method.

Frequently Asked Questions (FAQ)

• Q: Does the 1756-OF8IK support both current and voltage outputs?
  A: Yes, the module is configurable for either current (0-20mA/4-20mA) or voltage (-10 to +10VDC) output signals.
• Q: What does "isolated output" mean for this module?
  A: Each of the 8 outputs is electrically isolated from the others and the backplane, preventing ground loops and noise interference.
• Q: What terminal block is required for wiring?
  A: You need a 36-pin terminal block: either the 1756-TBCH or the 1756-TBS6H.
• Q: What protective features are included?
  A: The module offers overvoltage protection (±30V), short-circuit detection, and open-circuit detection.
• Q: Is the 1756-OF8IK suitable for harsh environments?
  A: Yes, it features a conformal coating for added protection against moisture and contaminants.