Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 1769-BOOLEAN / 1769-BOOLEAN/A |
| Manufacturer | Rockwell Automation (Allen‑Bradley) |
| Series | CompactLogix 1769 |
| I/O Configuration | 8 Inputs + 4 Outputs (24V DC) |
| Input Type | 8 × 24V DC Sinking (plus 8 virtual inputs) |
| Output Type | 4 × 24V DC Sourcing (Transistor) |
| Output Current Rating | 1.0 A @ 30°C (Derates to 0.5 A @ 60°C) |
| Logic Feature | On‑Module Boolean Expressions (AND, OR, XOR, NONE) |
| Closed‑Loop Time | ≤ 100 µs (Digital Filter = 0) |
| Operating Voltage | 10–30V DC @ 30°C (10–26V DC @ 60°C) |
| Isolation | 75V DC working (IEC Class 2 reinforced) |
| Dimensions (H×W×D) | 118 × 35 × 87 mm |
Main Features and Advantages
Hardware-based Boolean logic for deterministic control: The 1769‑BOOLEAN is not a simple pass-through module. It can be configured (via RSLogix 5000) to evaluate logic expressions using its 8 physical inputs and 8 virtual inputs (software bits) to control its 4 outputs. For example, you can set Output 0 = (Input 0 AND Input 1) OR Virtual_Input_2. This logic is processed locally on the module’s hardware in under 100 microseconds, providing a response time significantly faster than typical PLC scan times. This is critical for applications like emergency stop monitoring or high-speed sequencing where every millisecond counts.Compact I/O consolidation with high-speed response: By integrating both inputs and outputs in a single 35mm-wide module, it saves valuable chassis space compared to using separate input and output modules. The sourcing transistor outputs are designed for direct connection to 24V DC loads like solenoid valves, relays, or indicator lamps. The module’s fast input filters (configurable from 0 to 8 ms) allow it to ignore noise while still capturing rapid signal transitions, making it suitable for noisy industrial environments.
Application Field
The 1769‑BOOLEAN is primarily used in CompactLogix 5370 and 5380 control systems for high-speed interlocking and local decision-making. Common applications include machine safety circuits (where inputs from E‑stop buttons and light curtains must quickly disable outputs to contactors), material handling diverters (where sensor inputs directly control actuator outputs based on a simple logic equation), and packaging machine sequencing. It is also deployed in applications requiring redundant or voting logic (e.g., 2-out-of-3 sensor voting) that must be executed reliably even if the main controller communication is interrupted.
Related Products
- 1769‑IQ16 / 1769‑OB16: Standard 16-point input and output modules for general-purpose I/O expansion without the Boolean logic feature.
- 1769‑L24ER‑QB1B: A typical CompactLogix 5380 controller often paired with the BOOLEAN module for complex system integration.
- 1769‑ECR: The right-end termination module required to complete the 1769 I/O bus connection.
- 1769‑PA2 / PB2: CompactLogix power supplies that provide the 24V DC bus power for the module.
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