Description
1761-L16BBB A-B Programmable Logic Controller
Product Dimensions：
Product Description (Detailed Explanation)
The MicroLogix 1000 1761-L16BBB is an all-in-one controller that integrates the CPU, power supply, and I/O into a single unit. The “BBB” designation specifically indicates its power and I/O configuration: 24V DC Power, 24V DC Inputs, and 24V DC MOSFET Outputs.
It uses a non-volatile EEPROM memory to store its control program, ensuring that the logic is preserved even during total power loss without the need for a battery. Communication is handled via a dedicated RS-232 (8-pin mini-DIN) port using the DF1 or DH-485 protocols.
Product Parameters (Technical Specifications)
| Parameter Category | Specification |
| Input Power | 24V DC (Source) |
| Total I/O Count | 16 Points |
| Digital Inputs | 10 x 24V DC (Sink/Source) |
| Digital Outputs | 6 x 24V DC Source (MOSFET) |
| Memory Capacity | 1K Instruction (approx. 737 words) |
| Communication Port | RS-232 (Channel 0) |
| Protocols Supported | DF1 Full/Half Duplex, DH-485 (via converter) |
| Mounting | DIN-rail or Panel Mount |
| Dimensions | 120 x 80 x 73 mm (W x H x D) |
| High Speed Counter | 1 x 6.6 kHz counter |
Product Advantages (Key Benefits)
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Cost-Effective: Ideal for simple control logic that doesn’t justify the cost of a modular PLC system like ControlLogix or CompactLogix.
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Compact Footprint: The small “brick” design occupies minimal space in control panels, making it perfect for machine-level integration.
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Fast Execution: Designed for high-speed logic processing, with typical scan times much faster than relay-based control systems.
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Maintenance-Free: Since it utilizes EEPROM for memory storage, there is no internal battery to monitor or replace over time.
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Ease of Programming: Uses RSLogix 500 software, which is a standard, easy-to-learn environment for industrial automation engineers.
Precautions (Important Notes)
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Output Limitations: The BBB model uses MOSFET (Transistor) outputs. Unlike relay outputs, these are polarity-sensitive and can only switch DC loads. Do not attempt to switch AC voltages through these outputs.
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Legacy Status: This product is officially in the End of Life (EOL) or “Silver Series” phase. While still widely available as spare parts, it is not recommended for new, large-scale greenfield projects.
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Communication Cable: To program this unit, you require a specialized 1761-CBL-PM02 cable. A standard serial cable will not fit the 8-pin mini-DIN port.
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Fixed I/O: The MicroLogix 1000 is a fixed-I/O controller. You cannot add expansion modules to increase the number of points. If your I/O needs grow, you must replace the controller with a MicroLogix 1100 or 1400.
Product Applications (Typical Use Cases)
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Simple Packaging Machinery: Controlling heat sealers, small conveyors, or baggers.
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Material Handling: Managing simple pick-and-place gantry logic or box sorting diverters.
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Pumping & Irrigation: Controlling start/stop cycles, pressure monitoring, and basic valve timing in water management.
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Unit Operations: Dedicated control for auxiliary equipment like air compressors, industrial dryers, or lighting sequences.
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Educational Training: Frequently used in technical schools and labs as an introductory PLC for teaching ladder logic.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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