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- Allen Bradley
- 1794-IB16
- ControlNet Flex I/O Adapter Module
- USA
- 94 × 94 × 69 mm
- 0.11kg
- Xiamen, China
- New & In Stock
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1794-IB16 FLEX I/O DC Digital Input Module – Detailed Technical Overview
1. Product Introduction
The 1794-IB16 is a 16-channel 24V DC digital input module designed for distributed industrial automation systems based on a modular I/O architecture. It is used to acquire ON/OFF status signals from field devices and transmit them to a PLC or control system through a FLEX I/O backplane.
This module belongs to the FLEX I/O platform, which supports flexible system expansion and decentralized control configurations. It is widely applied in industrial environments where multiple discrete signals need to be collected efficiently in a compact space.
The 1794-IB16 uses sinking input configuration and is compatible with a wide range of FLEX terminal bases, allowing fast installation and simplified maintenance.
2. Product Features
- 16-channel DC digital input
- 24V DC sinking input type
- Compact modular structure
- LED status indicators per channel
- DIN rail installation
- Flexible distributed I/O architecture
- Hot-swappable module design
- High electrical noise immunity
- Stable signal acquisition performance
- Compatible with multiple FLEX I/O adapters
3. Technical Parameters
| Parameter | Specification |
|---|---|
| Model | 1794-IB16 |
| Product Type | DC digital input module |
| Series | FLEX I/O 1794 Series |
| Input Channels | 16 channels |
| Input Type | Sinking (DC) |
| Nominal Input Voltage | 24V DC |
| Input Voltage Range | 10–31.2V DC |
| ON-State Voltage | ≥ 10V DC |
| OFF-State Voltage | ≤ 5V DC |
| Nominal Input Current | 8–12 mA |
| Input Impedance | ~4.6 kΩ |
| FlexBus Current | ~20 mA |
| Power Dissipation | ~5 W |
| Isolation Voltage | 50V basic insulation |
| Indicator Lights | 16 LEDs |
| Mounting Type | DIN rail |
| Compatible Bases | FLEX I/O terminal bases |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Vibration Resistance | 5g (10–500 Hz) |
| Shock Resistance | 30g |
| Dimensions | 94 × 94 × 69 mm |
| Weight | 0.11 kg |
4. Product Function Description
The 1794-IB16 functions as a digital signal acquisition module within industrial automation systems.
Each of the 16 input channels monitors the voltage status of connected field devices such as switches, sensors, and relays. When a valid 24V DC signal is detected, the module converts it into a digital signal and transmits it to the controller via the FLEX I/O backplane.
The module does not perform control logic; instead, it acts as an interface between field wiring and the PLC system.
Its sinking input design is commonly used in industrial control systems where devices provide positive voltage signals.
5. Product Applications
The 1794-IB16 is widely used in industrial automation systems requiring multiple discrete DC input signals.
Typical Applications
- Factory automation systems
- Machine control panels
- Conveyor systems
- Packaging machinery
- Automotive production lines
- Material handling systems
- Pump control systems
- HVAC control systems
- Water treatment facilities
- Industrial safety monitoring
Typical Field Devices
- Proximity sensors
- Limit switches
- Push buttons
- Relay contacts
- Alarm signals
- Position sensors
6. Product Advantages
6.1 High Input Density
16 channels in a single compact module reduce cabinet space usage and improve system efficiency.
6.2 Stable Industrial Signal Processing
Designed for reliable 24V DC signal detection in electrically noisy environments.
6.3 Fast Maintenance Capability
Hot-swappable design allows module replacement without shutting down the full system.
6.4 Clear Diagnostics
LED indicators on each channel provide fast visual status checks.
6.5 Modular System Flexibility
Fully compatible with FLEX I/O distributed architecture for easy expansion.
6.6 Strong Environmental Resistance
Built for vibration, shock, and industrial temperature variations.
7. Brand Overview
This product belongs to a globally recognized industrial automation technology provider specializing in:
- PLC control systems
- Distributed I/O platforms
- Industrial communication networks
- Motion control solutions
- Safety automation systems
Its products are widely used in manufacturing, energy, logistics, automotive, and process industries, known for reliability, long lifecycle support, and system scalability.
8. Product Series Information
Series Name
FLEX I/O 1794 Series
Series Type
Distributed modular I/O system
Key Characteristics
- Modular expandability
- DIN rail installation
- Hot-swappable modules
- Wide range of digital and analog I/O
- Flexible system architecture
- Reduced wiring complexity
- Industrial network compatibility
The 1794-IB16 is part of the standard digital input module family within this series.
9. Recommended Related Models (Same Series or Similar)
| Model | Product Type | Function | Dimensions | Weight (kg) | Key Parameters |
|---|---|---|---|---|---|
| 1794-IB16 | DC input module | 16-channel 24V DC input | 94 × 94 × 69 mm | 0.11 kg | Sinking input |
| 1794-IB8 | DC input module | 8-channel DC input | 94 × 94 × 69 mm | 0.10 kg | Compact input module |
| 1794-OB16 | DC output module | 16-channel output | 94 × 94 × 69 mm | 0.30 kg | Sourcing output |
| 1794-IA16 | AC input module | 16-channel AC input | 94 × 94 × 69 mm | 0.11 kg | 120V AC input |
| 1794-TB3 | Terminal base | Wiring base unit | 94 × 94 × 69 mm | 0.19 kg | Screw terminal base |
10. Recommended Popular Models from Same Brand
| Model | Product Type | Function | Dimensions | Weight (kg) | Key Parameters |
|---|---|---|---|---|---|
| 1756-L81E | PLC controller | ControlLogix CPU | 145 × 175 × 52 mm | 0.92 kg | High-performance processor |
| 1769-L33ER | Compact PLC | CompactLogix controller | 118 × 87 × 87 mm | 0.60 kg | Integrated Ethernet |
| 1734-AENTR | Ethernet adapter | POINT I/O communication | 75 × 75 × 55 mm | 0.18 kg | Distributed I/O networking |
| 2711P-T10C4D8 | HMI panel | Operator interface | 271 × 212 × 60 mm | 1.80 kg | Touchscreen display |
| 20-COMM-E | Drive communication module | Ethernet communication | 140 × 95 × 30 mm | 0.22 kg | Industrial network interface |
11. Installation Notes
- Confirm correct terminal base compatibility before installation
- Maintain proper grounding inside control cabinet
- Separate signal wiring from power cables
- Ensure correct 24V DC supply stability
- Avoid mechanical stress on module connectors
- Secure DIN rail mounting properly
12. Maintenance Recommendations
- Inspect terminal connections regularly
- Monitor LED status indicators
- Check input wiring condition
- Maintain clean and dry enclosure environment
- Replace module if abnormal behavior occurs
13. Summary
The 1794-IB16 is a robust and widely used 16-channel DC input module designed for industrial distributed control systems. Its compact structure, stable signal performance, and flexible modular architecture make it suitable for a broad range of automation applications.
It is especially effective in systems requiring high-density digital input acquisition with reliable long-term operation and easy maintenance.