1769-IA16 | Allen-Bradley Discrete Input Module Supplier

What Is the 1769-IA16?

When your automation system demands precise monitoring of AC field devices, the Allen-Bradley 1769-IA16 provides a robust solution. This discrete input module from the CompactLogix family features sixteen input channels designed for 100/120 VAC operation. Each channel operates within a voltage range of 79 to 132 VAC, ensuring compatibility with common industrial signals. The module is compatible with 1769 CompactLogix controllers and MicroLogix 1500 systems, making it a versatile choice for expanding I/O capacity.

Engineers appreciate the 1769-IA16 for its straightforward integration and reliable performance. With an input frequency range of 47 to 63 Hz, it handles varying line conditions without issue. The module's open enclosure type suits panel-mounted installations, and its compact dimensions—118 x 35 x 87 mm (4.65 x 1.38 x 3.43 in.)—save valuable cabinet space. Whether upgrading an existing line or designing a new system, this module delivers consistent results.

Key Features & Technical Specs

• 16 input channels with internally connected commons for simplified wiring.
• Operating voltage of 79 to 132 VAC ensures broad AC signal compatibility.
• Input delay of 20 ms for both on and off states provides stable signal filtering.
• Current draw of 115 mA at 5.1 Vdc minimizes backplane power consumption.
• Heat dissipation of 3.3 W keeps thermal load low in dense cabinets.
• Off-state voltage max of 20 VAC prevents false triggering from leakage.
• On-state voltage min of 79 VAC ensures reliable detection of active signals.
• Backplane current of 1.4 Amps at 24 Volts supports module operation.

A distinctive spec is the input frequency range of 47 to 63 Hz, which allows the module to work with both 50 Hz and 60 Hz power systems. This flexibility reduces the need for separate modules in global installations, simplifying inventory and maintenance.

Real-World Applications

In manufacturing environments, the 1769-IA16 excels at monitoring limit switches, push buttons, and proximity sensors that output AC signals. For instance, in a packaging line, it reliably detects the position of conveyor stops and triggers sorting actions. The module's 16-point density makes it ideal for applications where multiple discrete inputs are needed, such as machine safety interlocks or material handling systems. Because it uses internally connected commons, wiring is straightforward, reducing installation time and potential errors.

Installation & Setup

Mounting the 1769-IA16 is simple using either panel mount or DIN rail. The module fits into a single slot of a 1769 CompactLogix chassis or connects directly to a MicroLogix 1500 base unit. Use wire sizes of 22…14 AWG solid or 22…16 AWG stranded with copper conductors rated for 90 °C. The removable terminal block simplifies wiring: connect AC field devices to the appropriate terminals, then insert the block into the module. Ensure the power supply distance rating of 8 modules is observed; if more modules are needed, add an additional power supply or I/O bank. Always verify that the operating voltage stays within 79 to 132 VAC to prevent damage.

Routine Care & Reliability

To maintain long-term reliability, periodically inspect the 1769-IA16 for signs of dust or contamination. Because it is an open-style enclosure, keep the surrounding area clean to avoid debris interfering with connections. Check that all terminal block screws remain tight, as vibration can loosen them over time. The module's electronic protection guards against overcurrent and short circuits, reducing the risk of failure. Following these simple steps helps extend service life and minimize unplanned downtime.

Compatible Systems & Integration

The 1769-IA16 integrates seamlessly with 1769 CompactLogix controllers and MicroLogix 1500 systems. It communicates over the backplane, requiring no additional communication cables beyond the standard 16-point connection. Compatible power supplies include the 1769-PA2, 1769-PB2, 1769-PA4, and 1769-PB4. When used in a CompactLogix system, the module's power supply distance rating of eight modules must be respected. For larger systems, place additional modules beyond this limit after an extra power supply or in a separate I/O bank. This flexibility allows you to scale I/O capacity without redesigning the entire layout.

FAQs about the 1769-IA16

Q: What is the input voltage range for the 1769-IA16?

A: The operating voltage range is 79 to 132 VAC, with a nominal input voltage of 100/120 VAC.

Q: How many input channels does the 1769-IA16 have?

A: It has 16 input channels arranged in a single group with internally connected commons.

Q: What is the input delay time for this module?

A: The input delay is 20 ms for both the on and off states.

Q: What controllers are compatible with the 1769-IA16?

A: It is compatible with 1769 CompactLogix controllers and MicroLogix 1500 systems.

Q: What is the current draw of the 1769-IA16?

A: The module draws 115 mA at 5.1 Vdc from the backplane.

Q: Does the 1769-IA16 support both 50 Hz and 60 Hz?

A: Yes, its input frequency range is 47 to 63 Hz, covering both common line frequencies.

Product Support & Availability

The 1769-IA16 is in stock and ready to ship from Petro Auto Tech. As a trusted supplier of industrial automation parts, Petro Auto Tech ensures fast delivery and reliable service. Contact our team for assistance with ordering or technical questions.