Product Summary
The Allen‑Bradley 1771‑IGD delivers 16 high‑speed TTL input points for demanding control systems. This module supports positive or negative logic states. It operates reliably with 5V DC supplies and provides sub‑millisecond signal detection.
Installation Guide for the 1771‑IGD
Begin by selecting a compatible 1771 chassis. You can use Series A or B models such as the 1771‑A1B or 1771‑A2B. Mount the module securely into any available slot.
Next, attach the required 1771‑WH wiring arm. Use 14 AWG stranded copper wire for signal connections. Tighten each terminal to 9 lb‑inch (1.0 Nm). Always use Belden 8761 cable or an equivalent.
The module draws a backplane current of 130 mA at 5 VDC. Check that your chassis power supply can support this load. The operating temperature range spans 0 to 60 degrees Celsius.
Technical Performance Evaluation
The 1771‑IGD processes sixteen isolated TTL inputs with excellent speed. Its input signal delay is less than one millisecond. This ensures fast and reliable data capture for your PLC system.
You can select either positive or negative logic. In positive logic, the On state equals 2.0 to 5.25 VDC. The Off state measures -0.2 to 0.8 VDC.
You reverse these values when using negative logic. A simple jumper on the module makes this change. This flexibility helps the 1771‑IGD adapt to diverse sensor types.
Product Procurement Considerations
The module includes a 0.5A 250V normal‑blow fuse. This protects the internal 5V DC circuit from power surges. Isolation voltage reaches 1500V AC RMS for 1 second.
Power dissipation ranges from 0.4 watts minimum to 2.7 watts maximum. Thermal dissipation spans 1.4 to 9.2 BTU per hour. These low values keep the module cool in crowded racks.
The 1771‑IGD works with 1771‑AM1 or 1771‑AM2 I/O chassis. Always verify your system configuration before purchasing.
Logistics & Standard Packaging Details
- Each order includes one Allen‑Bradley 1771‑IGD module.
- The package contains a 1771‑WH field wiring arm.
- A printed specification sheet is provided.
- Express delivery is available via FedEx, UPS, and DHL.
