Overview

The 1771-IBD module is a 16-point, sinking input module designed for digital inputs. It serves as a reliable interface between the control system and field devices, enabling the collection of discrete signals from various sensors and switches.

Specifications

• Inputs per Module: 16
• Module Location: Compatible with all 1771 I/O chassis except 1771-A1, -A2, and -A4
• Input Voltage Range: 10 to 30V DC
• Minimum Input Current:
  • 4.5 mA at 10V DC
  • 15 mA at 30V DC
• Minimum Off-state Current: 2.0 mA @ 5V DC
• Maximum Off-state Voltage: 5V DC
• Minimum On-state Voltage: 10V DC
• Input Impedance: 2.2K ohms maximum
• Input Signal Delay:
  • Low to High propagation delay: 1 ms
  • High to Low propagation delay: selectable - 1 ms or 6 ms
• Power Dissipation:
  • Maximum: 7.3 Watts
  • Minimum: 1.0 Watts
• Thermal Dissipation:
  • Maximum: 24.7 BTU/hr
  • Minimum: 3.4 BTU/hr
• Backplane Current: 130 mA @ 5V DC ±5%
• Isolation Voltage: Meets or exceeds UL Standard 508 and CSA Standard C22.2 No. 142

Environmental Conditions

• Operational Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Relative Humidity: 5 to 95% (without condensation)

Conductors

• Wire Size:
  • 14 gauge (2 mm²) stranded maximum
  • 3/64 inch (1.2 mm) insulation maximum
• Keying:
  • Between 10 and 12
  • Between 16 and 18
• Field Wiring Arm: Standard Cat. No. 1771-WH
• Wiring Arm Screw Torque: 7-9 inch-pounds

Agency Certification

• CSA certified
• CSA Class 1, Division 2, Groups A, B, C, D certified
• UL listed
• CE marked for all applicable directives