Description
The Allen-Bradley 1756-IG16 is a high-performance digital DC input module designed for integration within the ControlLogix platform. This module features 16 input points, organized with nine points per common, specifically engineered to interface with 5V DC TTL source signals. It provides reliable signal acquisition for industrial automation systems requiring low-voltage digital input monitoring.
Features
- 16-point digital DC input density for efficient I/O allocation.
- Optimized for 5V DC TTL source applications.
- Configurable input filter times for noise immunity and signal debouncing.
- Low power dissipation of 1.4 Watts at 60 degC.
- Compact ControlLogix form factor for chassis-based mounting.
Technical Specifications
| Module Type |
Digital DC Input Module |
| Input Points |
16 (9 per common) |
| Operating Voltage |
4.5V to 5.5V DC |
| Input Delay Time |
0.25 ms + selectable filter time |
| Max Off-State Current |
4.1 mA |
| Backplane Current (5V) |
110 mA |
| Power Dissipation |
1.4 W at 60 degC |
Installation Guidelines
- Ensure the ControlLogix chassis is powered down before inserting or removing the module to prevent electrical damage.
- The module should be seated firmly into the chassis slot and secured using the provided locking mechanism.
- Use shielded cabling for input signals to minimize electromagnetic interference (EMI) in high-noise environments.
- Maintain proper ventilation in the control cabinet to ensure operating temperatures do not exceed the rated limits.
- Verify that the common wiring matches the module's 9-point grouping configuration during installation.
FAQ
What is the primary application for the 1756-IG16?
This module is used for receiving 5V DC TTL signals from field devices into a ControlLogix controller system.
Does this module require a specific chassis?
Yes, it is designed for use with the standard Allen-Bradley ControlLogix I/O chassis.
Can I adjust the input delay?
Yes, the module supports selectable filter times that add to the base 0.25 ms input delay to help filter out transient noise.
