Product Summary
The 1771-IGD is a 16-point TTL input module from Rockwell Automation. This module provides selectable positive or negative logic states for versatile system integration. It delivers fast signal processing with a delay of less than 1 millisecond. Engineers use this unit for precise digital signal detection in 5V DC environments.
Expert Application Guide for the 1771-IGD Module
The 1771-IGD module operates on a 5V DC power supply. It requires a stable voltage between 5.0 and 5.3 Volts for proper function. The module draws a maximum backplane current of 130 mA. This design ensures compatibility with standard 1771 chassis configurations.
For positive logic applications, the module detects an ON state between 2.0 and 5.25 Volts DC. It reads an OFF state from -0.2 to 0.8 Volts DC. You can switch this module to negative logic by adjusting the front jumper. This flexibility helps engineers handle diverse signal protocols.
Installation requires the 1771-WH wiring arm for signal termination. Use 14 AWG stranded copper wire with 60°C insulation rating. The recommended cable is Belden 8761 or an equivalent type. Apply a torque of 9 lb-inch or 1.0 Newton-meter to each terminal screw.
This unit includes a 0.5 A 250V normal blow fuse for protection. The fuse guards the 5V DC supply against power surges. This protective feature enhances system reliability in industrial settings. The module fits into Series A or B 1771-A1B through A4B chassis.
Technical Procurement Guide for Engineers
Procurement managers require accurate specs for system design. This Allen-Bradley module offers 16 current sourcing inputs. Each input requires a maximum sink current of 0.8 mA. The source current per input reaches a maximum of 7 mA.
The module provides an isolation voltage of 1500V AC RMS for 1 second. This isolation protects sensitive PLC backplane circuits. The maximum power dissipation is 2.7 Watts with a minimum of 0.4 Watts. Thermal dissipation ranges from 1.4 to 9.2 BTU per hour.
The 1771-IGD operates in temperatures from 0 to 60 degrees Celsius. This thermal range suits most industrial control cabinets. The module status is listed as an earlier model. It remains a reliable choice for legacy system maintenance and expansion.
Logistics & Standard Packaging Details
