Description
The Allen-Bradley 1746-IG16 is a high-speed, 16-channel digital input module specifically engineered for the SLC 500 controller platform. Designed for applications requiring TTL (Transistor-Transistor Logic) level compatibility, this module facilitates the direct interface of 5V DC signals, making it an essential component for systems utilizing microcontrollers, high-speed sensors, and BCD-based equipment.
Features
- Sixteen (16) individual current-sourcing input channels.
- Optimized for low-latency performance with a signal delay of 0.25 ms (ON) and 0.5 ms (OFF).
- Integrated electro-optical isolation rated at 1500V AC to protect the SLC 500 backplane from field-side electrical interference.
- Engineered for 5V DC logic levels, supporting an input voltage range of 4.5 to 5.5V DC.
- Compact SLC 500 form factor for efficient rack mounting.
Applications
This module is ideally suited for industrial environments where high-speed electronic signal acquisition is required. It is frequently employed in systems interfacing with digital encoders, micro-processor-based controllers, and other 5V DC logic devices that cannot be serviced by standard 24V DC input modules.
Technical Specifications
| Brand |
Allen-Bradley |
| Product Series |
SLC 500 |
| Input Type |
5V DC TTL Sourcing |
| Channel Count |
16 |
| Operating Voltage |
4.5 to 5.5V DC |
| Signal Delay (ON/OFF) |
0.25 ms / 0.5 ms |
| Backplane Current (5V) |
140 mA |
| Power Dissipation |
1 Watt |
| Isolation |
1500V AC |
| Operating Temperature |
0 to 60 degC |
Installation Guidelines
- Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
- Verify that all field wiring is properly routed away from high-voltage AC lines to minimize EMI.
- Use appropriate shielded cabling for high-speed signal inputs to maintain data integrity.
- Ensure the module is fully seated in the chassis slot and secured with the integrated locking tabs.
- Maintain adequate ventilation within the enclosure to ensure the ambient temperature does not exceed 60 degC.
FAQ
Is the 1746-IG16 compatible with 24V DC signals?
No, this module is strictly designed for 5V DC TTL signals. Applying 24V DC to the inputs will cause permanent damage to the module.
Does this module require external power?
The module draws its required power from the SLC 500 backplane (140 mA at 5V DC). It does not require a separate external power supply for the logic circuitry.
