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- 1769-IA16
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 0.28kg
- Xiamen, China
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Technical Report: 1769-IA16 Compact I/O 16-Point 120V AC Digital Input Module
1. Product Overview
The 1769-IA16 is a 16-channel AC digital input module designed for Compact I/O industrial automation systems. It is used to receive and process standard 120V AC field signals from sensors, switches, pushbuttons, and other industrial devices.
Each input channel is optically isolated and designed to ensure stable signal acquisition in noisy industrial environments. The module converts external AC input signals into digital data that can be read by a PLC system.
It is widely used in medium-scale automation systems where AC-powered control devices are standard.
2. Brand and Series Information
Brand: Industrial automation control platform ecosystem
Series: 1769 Compact I/O Series
Product Family: Digital AC Input Modules
Module Type: 120V AC 16-Point Digital Input Module
3. Product Function Description
The 1769-IA16 is responsible for detecting ON/OFF status of AC field devices.
Main functions include:
- Reading 16 discrete 120V AC input signals
- Converting AC field signals into PLC-readable digital data
- Providing optical isolation between field wiring and backplane
- Filtering signal noise for stable input detection
- Supporting grouped input channels for structured wiring
Typical signal sources include limit switches, relays, pushbuttons, and auxiliary contacts.
4. Technical Parameters
Electrical Specifications
| Parameter | Value |
|---|---|
| Number of Inputs | 16 channels |
| Input Voltage Range | 79–132V AC |
| Nominal Frequency | 47–63 Hz |
| On-state Current | 5–12 mA @ 120V AC |
| Inrush Current | Up to 250 mA |
| Backplane Current | 115 mA @ 5V DC |
| Power Consumption | ~0.575 W |
| Isolation Voltage | 1517V AC / 2145V DC (input to bus) |
Mechanical Specifications
| Parameter | Value |
|---|---|
| Dimensions (H × W × D) | 118 mm × 35 mm × 87 mm |
| Height with Mounting Tabs | 138 mm |
| Weight | 0.28 kg (approx. 0.61 lb) |
| Mounting Type | DIN rail / panel mount |
| Slot Width | 1 slot |
| Terminal Type | Removable terminal block |
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5% – 95% non-condensing |
| Vibration Resistance | Industrial IEC standard |
| Shock Resistance | Up to 15G |
| Pollution Degree | Industrial environment rated |
5. Product Advantages
1. High Channel Density
Supports 16 input points in a single compact module, reducing cabinet space requirements.
2. Strong Electrical Isolation
High isolation rating protects PLC systems from field-side electrical noise and surges.
3. Stable AC Signal Detection
Designed specifically for 120V AC signals with reliable ON/OFF recognition.
4. Easy Installation and Maintenance
Removable terminal blocks simplify wiring and replacement.
5. Industrial Reliability
Built for continuous operation in vibration, dust, and electrical noise environments.
6. Flexible System Integration
Compatible with distributed and local I/O architectures in Compact I/O systems.
6. Application Areas
The 1769-IA16 is commonly used in:
- Industrial machinery control panels
- Conveyor and material handling systems
- Packaging machines
- Pump and motor control systems
- HVAC automation systems
- Factory production lines
- General-purpose PLC-based control systems
- Electrical switch monitoring applications
It is especially suitable where AC control circuits are already used in traditional industrial wiring systems.
7. Recommended Models (Same Series / Related Modules)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-IQ16 | 24V DC Digital Input Module | 16-point DC input | Sensor monitoring |
| 1769-OB16 | Digital Output Module | 16-point transistor output | Actuator control |
| 1769-IF8 | Analog Input Module | 8-channel analog input | Process measurement |
| 1769-OF2 | Analog Output Module | 2-channel analog output | Control output |
| 1769-HSC | High-Speed Counter Module | Up to 1 MHz counting | Encoder applications |
8. Other Popular Models (Same Platform – Widely Used)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-L33ER | PLC Controller | EtherNet/IP CPU, 2 MB memory | Machine automation |
| 1769-L36ERM | PLC Controller | High-speed motion control CPU | Advanced automation |
| 1769-AENTR | EtherNet/IP Adapter | Dual Ethernet ports, DLR support | Distributed I/O networking |
| 1769-SDN | DeviceNet Scanner Module | Fieldbus master control | Legacy industrial networks |
| 1769-ASCII | Serial Communication Module | Dual-port ASCII interface | Barcode/printer systems |
9. System Role Summary
The 1769-IA16 plays the role of a standard AC signal acquisition module within Compact I/O systems. It acts as the interface between high-voltage field devices and the low-voltage PLC backplane system.
Its function is purely input-based, focusing on reliable signal detection rather than control or processing logic.
10. Summary
The 1769-IA16 is a robust and widely used AC digital input module designed for industrial automation systems requiring reliable 120V AC signal detection. Its combination of high channel density, strong isolation, and stable performance makes it suitable for traditional industrial wiring environments.
Its main strengths include durability, electrical safety, simple integration, and consistent signal processing in harsh industrial conditions.