Product Overview

The Allen-Bradley 1761-L16BWB is a foundational component of the MicroLogix 1000 family, engineered to provide high-speed, reliable control for space-constrained industrial environments. This compact Programmable Logic Controller (PLC) is designed to replace traditional relay-based logic, offering a more flexible and programmable alternative for localized machine control. It operates on a 24V DC power supply and integrates both digital and analog capabilities within a single, fixed-hardware footprint.

Designed for longevity and ease of use, the 1761-L16BWB is particularly effective for standalone applications such as HVAC control, wastewater treatment processes, and small-scale assembly automation. Its rugged construction ensures stable performance against electrical noise and environmental stress typical of industrial settings.

Technical Characteristics

• Input Power: 24V DC

• Digital Inputs: 10 Inputs (24V DC Sink/Source)

• Digital Outputs: 6 Relay Outputs

• Relay Contact Rating: 2.0 A per point (max)

• Analog Channels: 1 Analog Input (0 to 10V DC) / 1 Analog Output (4 to 20 mA or 0 to 10V DC)

• User Memory: 1 KB EEPROM (Approximately 737 instruction words)

• Communication Interface: RS-232 port (8-pin mini-DIN)

• Supported Protocols: DF1 Full-Duplex, DH-485 (via interface converter)

• Response Time: 10 ms typical for discrete I/O; 2.5 ms for analog updates

• Mounting Options: DIN rail or Panel mount

• Dimentions:5 x6.3x12.3cm

• Operating Temperature: 0 to 55 °C (32 to 131 °F)

Operational Features and Integration

The 1761-L16BWB utilizes non-volatile EEPROM memory to ensure program retention without the need for a backup battery, significantly reducing long-term maintenance cycles. The controller's instruction set includes basic bit logic, timers, counters, and comparison instructions, which are sufficient for most small-scale sequencing tasks.

Connectivity is handled through the primary RS-232 port, allowing for seamless integration with Human Machine Interfaces (HMI) or data acquisition systems. For field service and rapid logic adjustments, the unit is compatible with the MicroLogix Hand-Held Programmer (HHP). Its compact physical dimensions (approximately 120mm x 73mm x 80mm) allow it to be installed in shallow enclosures where space is at a premium.