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Allen-Bradley 1762-L24BWA MicroLogix 1200 Programmable Controller
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- Part Number: 1762-L24BWA
- Brand: Allen-Bradley
- Type: CPU Processors
- Barcode: USA
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Product Description
The Allen-Bradley 1762-L24BWA, also cataloged as the 1762-L24BWA Programmable Controller, operates as a dedicated hardware component for direct digital signal processing and relay load actuation within MicroLogix 1200 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1762-L24BWA |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.50 lbs (0.68 kg) |
| Dimensions | Standard 1762 MicroLogix 1200 Controller Frame |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 120/240 VAC Line Voltage |
| Product Line | MicroLogix 1200 |
| Product Type | CPU Processors |
| Digital Inputs | 14 total (10 Standard Inputs, 4 Fast Inputs) |
| Digital Outputs | 10 Relay Outputs |
| Input Nominal Voltage | 24 VDC |
| Input Impedance | 3.3 kohm (Inputs 0-3), 2.7 kohm (Inputs 4+) |
| On-State Input Voltage | 14-26.4 VDC (Inputs 0-3), 10-26.4 VDC (Inputs 4+) |
| Off-State Input Voltage | 0-5 VDC |
| Off-State Leakage Current | 1.5 mA max |
| Status Display | Integrated LED Status Indicators |
High-Density I/O & Firmware Integration
The controller manages backplane bus communication velocity and real-time execution across local expansion I/O banks. Hardware firmware flash compatibility allows high-speed interrupt handling across the 4 fast digital inputs while executing internal relay output logic. Direct physical routing of 24 VDC input signals into discrete optocouplers maintains signal isolation, allowing low-latency input image table updates during high-density I/O density scaling operations.
Frequently Asked Questions
Q: What are the electrical differences between Inputs 0-3 and Inputs 4 and above on the 1762-L24BWA?
A: Inputs 0 through 3 are high-speed fast inputs featuring a 3.3 kohm nominal impedance and an ON-state voltage threshold of 14 to 26.4 VDC (at 55 deg C). Inputs 4 and above are standard inputs with a 2.7 kohm impedance and a lower ON-state threshold of 10 to 26.4 VDC.
Q: Can the relay outputs on the 1762-L24BWA handle both AC and DC load circuits?
A: Yes. The 10 electromechanical relay outputs provide dry-contact isolation, allowing independent switching of user-supplied AC or DC load voltages up to the module's maximum contact rating limits.
Field Installation Guidelines
- Isolate main line power (120/240 VAC) prior to mounting, wiring, or servicing the controller unit.
- Mount the controller onto a standard 35 mm DIN rail or secure it to a panel enclosure backplate using the integrated mounting screw holes.
- Ensure proper separation of high-voltage AC power lines and 24 VDC input signal conductors inside panel wireways to eliminate noise coupling.
- Wire field sensors to the 24 VDC input terminals, maintaining strict compliance with the maximum 1.5 mA off-state leakage current limit for connected solid-state devices.
- Connect frame ground directly to the controller grounding terminal using a low-impedance copper wire (minimum 14 AWG) to ensure noise immunity.
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