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The 1769-BOOLEAN (Part Number: 1769-BOOLEAN) is a specialized, ultra-high-speed digital combo module designed for the Allen-Bradley CompactLogix and MicroLogix 1500 platforms. Unlike standard I/O modules that rely on the PLC scan time, the 1769-BOOLEAN features an onboard logic engine capable...
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The 1769-BOOLEAN (Part Number: 1769-BOOLEAN) is a specialized, ultra-high-speed digital combo module designed for the Allen-Bradley CompactLogix and MicroLogix 1500 platforms. Unlike standard I/O modules that rely on the PLC scan time, the 1769-BOOLEAN features an onboard logic engine capable of a 1-microsecond closed-loop response. This module is engineered for applications where decision-making speed is too fast for traditional backplane communication, allowing outputs to react to inputs almost instantaneously based on user-defined Boolean expressions.
The module provides eight 24V DC digital inputs and four 24V DC sourcing outputs. Users can configure internal logic using operations such as AND, OR, and XOR to link real physical inputs or "virtual" inputs from the PLC program to the physical outputs. This embedded logic ensures that even if the PLC processor is in a long scan cycle or a fault state, the high-speed logic within the 1769-BOOLEAN continues to execute, making it ideal for high-speed sorting, web tensioning, and safety-interlock-style applications.
| Specification | Details |
|---|---|
| Logic Execution Speed | 1 microsecond (Closed-loop time) |
| Input Impedance | 2.0 kΩ at 24V DC; 2.3 kΩ at 30V DC |
| Heat Dissipation | 3.55 Watts maximum |
| Dimensions | 118 mm x 35 mm x 85 mm (4.65 x 1.38 x 3.34 in) |
| Weight | 0.17 kg |
The 1769-BOOLEAN is the preferred choice for high-speed manufacturing lines, such as bottling or pharmaceutical packaging, where a "reject" arm must fire within microseconds of a sensor trigger. It is also used in high-speed material handling to manage rapid-fire solenoids or pneumatic actuators that require timing precision beyond the capabilities of standard PLC scan times.
What is the difference between a "real" and "virtual" input on this module?
A "real" input is a physical electrical signal wired to the module's terminals. A "virtual" input is a bit sent from the PLC program via the backplane. The module can combine both in its Boolean expressions to decide when to fire an output.
Can I use this module without a PLC?
While the module can execute its internal Boolean logic independently once configured, it must be part of a 1769 backplane (connected to a CompactLogix or MicroLogix 1500) for initial configuration and power.
