The Allen-Bradley 1746-OG16 is a 16-point TTL (Transistor-Transistor Logic) current sinking output module designed for the SLC 500 programmable logic controller system. This module provides a high-speed interface for applications requiring 5 VDC logic-level signaling, allowing the SLC 500 controller to communicate with external TTL-compatible devices.
Features
16 discrete output channels
Current sinking configuration for TTL logic compatibility
Voltage range: 4.5 to 5.5 VDC
Designed for standard SLC 500 chassis mounting
Backplane current consumption: 180 mA at 5 VDC
Technical Specifications
Product Model
1746-OG16
Module Type
TTL Current Sinking Output
Number of Outputs
16
Voltage Range
4.5 - 5.5 VDC
Current per Output
0.024 A
Current per Module
0.384 A
Backplane Current (5V)
180 mA
Manufacturer
Allen-Bradley
Installation Guidelines
Ensure the SLC 500 system power is disconnected before installing or removing the module from the chassis.
The module must be seated firmly in the I/O slot and secured using the top and bottom retaining screws to ensure proper backplane connection and vibration resistance.
Use appropriate shielded cabling for TTL signal lines to minimize electromagnetic interference (EMI) in industrial environments.
Maintain adequate clearance around the chassis for proper ventilation and cooling.
Handle with care to prevent electrostatic discharge (ESD) damage to the internal circuitry.
FAQ
Is the 1746-OG16 still in production?
No, the 1746-OG16 was discontinued by the manufacturer on December 31, 2014. It is currently available primarily through surplus or secondary market channels.
What does TTL mean in the context of this module?
TTL stands for Transistor-Transistor Logic. This module is specifically designed to output 5 VDC logic signals, which are standard for many digital electronic components and microcontrollers, as opposed to the standard 24 VDC outputs typically used in industrial PLC applications.
