1771-OFE2 | Allen-Bradley Analog Output Module

1771-OFE2 Analog Output Module Specifications

Module Overview

• Outputs per Module: 4 Individually Isolated
• Module Location: One Slot in Bulletin 1771 I/O Chassis

Output Characteristics

• Voltage Ranges (Nominal):
  • +1 to +5V DC, +10 to +10V DC, 0 to +10V DC (1771-OFE1)
• Maximum Output Current: 10mA per Channel (Voltage Mode, 1771-OFE1)
• Current Ranges (Nominal):
  • 4 to +20mA, 5V DC (1771-OFE2)
  • 0 to +50mA, 12.5V DC (1771-OFE3)
• Resolution: 12-Bit Binary – 1 Part in 4095
• Capacitance: 0.01µF (Voltage Outputs), 0.022µF (Current Outputs)
• Impedance:
  • Voltage Outputs: <0.25 ohms (Excluding Wiring Resistance)
  • Current Outputs: >1.5 megohms
• Max Loop Impedance (Current Mode):
  • Up to 1200 ohms Load Resistance (1771-OFE2)
  • Up to 400 ohms Load Resistance (1771-OFE3)
• Overload Protection: Short Circuit Protection (up to 1 minute)

Power and Thermal Specifications

• Backplane Power:
  • 1.50A (1771-OFE1, 1771-OFE2), 2.50A (1771-OFE3)
• Power Dissipation:
  • 7.9W (1771-OFE1, 1771-OFE2), 13.1W (1771-OFE3)
• Thermal Dissipation:
  • 26.9 BTU/hr (1771-OFE1, 1771-OFE2), 44.5 BTU/hr (1771-OFE3)
• Adjacent Slot Power Dissipation: Max 10 Watts

Isolation and Converter Specifications

• Isolation Voltage: Tested to 850V DC (1s)
• D/A Converter Setting Time: 0.8 ms max (Resistive Load)
• Internal Scan Rate: 8.0 ms (BCD Data and Scaling), 1.6 ms (Binary Data, No Scaling)
• Accuracy: ±0.1% of Full Scale (BCD Mode), ±0.5 LSB (Binary Mode)
• Temperature Coefficient: ±50 ppm/°C of Full Scale Range

Weight：0.07kg