Product Overview
The Allen-Bradley 1762-L24BWAR is an embedded I/O and input power controller from the MicroLogix 1200 series. This industrial automation module combines a CPU, power supply, and I/O in a compact unit, simplifying panel design and reducing wiring. With 10 relay outputs and 14 DC inputs, the 1762-L24BWAR delivers flexible control for a wide range of machines and processes.
This controller runs on 120-240V AC input power, making it suitable for global installations. The 1762-L24BWAR includes 10 standard 24V DC inputs and 4 fast 24V DC inputs, plus 10 relay outputs for switching inductive loads. An integrated RS-232 port (Programmer/HMI) supports DH Full-duplex communication for programming and operator interface connectivity.
Technical Specifications
Below are the key specifications for the Allen-Bradley 1762-L24BWAR, sourced directly from the manufacturer's data:
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number / Catalog No. |
1762-L24BWAR |
| Input Power |
120-240V AC |
| Inputs |
(10) 24V DC and (4) Fast 24V DC |
| Outputs |
(10) Relay |
| UPC |
10612598207173 |
The 1762-L24BWAR measures approximately 3.5 x 4.33 x 3.43 inches. Note that the sensor supply COM is internally connected to chassis ground; use this supply only for input devices (switches, sensors), not for output circuits.
Input Characteristics
Understanding input electrical characteristics is critical for proper sensor selection. The 1762-L24BWAR provides two input groups with different response times:
-
Inputs 0-3: Minimum on-state current 2.5 mA at 14V DC; nominal 7.3 mA at 24V DC; maximum 12 mA at 30V DC. Frequency range 0-20 Hz.
-
Inputs 4 and above: Minimum on-state current 2 mA at 10V DC; nominal 8.9 mA at 24V DC; maximum 12 mA at 30V DC. Frequency range 0 Hz to 1 kHz (depending on scan time).
-
Off-state voltage: 0-5V DC; off-state leakage current: 1.5 mA minimum.
The total current drawn by all connected devices equals the sum of all sensor currents. Ensure your power budget accounts for this.
Applications
The 1762-L24BWAR is well-suited for small to medium control systems in industries such as packaging, material handling, and machine tools. For example, it can manage a conveyor system with multiple photo-eye sensors and motor contactors. The fast inputs (4-24V DC) handle high-speed counting or encoder feedback, while relay outputs switch solenoids and lamps.
In a batch processing line, the 1762-L24BWAR can sequence valves and monitor limit switches. The built-in RS-232 port allows connection to a PanelView HMI for operator control and diagnostics. Because the controller supports sink/source wiring, it adapts to both NPN and PNP sensor configurations, simplifying integration.
Installation and Setup
Mount the 1762-L24BWAR on a standard DIN rail or panel using the integral mounting slots. Ensure adequate clearance for ventilation and wiring. Connect 120-240V AC to the input power terminals. Wire input devices to the appropriate input terminals, respecting the common (COM) connection. For relay outputs, observe contact ratings and use external protection for inductive loads.
When using the sensor supply, remember that its COM is internally tied to chassis ground. Do not use this supply for output circuits. Configure the RS-232 port for DH Full-duplex communication; note that it cannot initiate messages, and parameters are fixed.
Maintenance and Reliability
Routine inspection of the 1762-L24BWAR is minimal. Periodically check for dust accumulation on the enclosure and ensure ventilation ports are clear. Verify that all wiring connections remain tight, especially on relay terminals that handle higher currents. Avoid exposing the module to excessive vibration or temperature extremes beyond its rated environment.
Because the relay outputs have a finite mechanical life, plan for periodic replacement in high-cycle applications. Monitoring input status via the LED indicators helps catch sensor failures early, reducing downtime.
Compatibility and Integration
The 1762-L24BWAR is part of the MicroLogix 1200 family and works with Rockwell Automation's RSLogix 500 programming software. It supports DH Full-duplex networking via the RS-232 port, allowing connection to other MicroLogix controllers or PanelView terminals. The controller can also be integrated into a larger control system using an optional EtherNet/IP or DeviceNet interface module (not included).
For replacement or upgrade projects, the 1762-L24BWAR drops into existing MicroLogix 1200 installations, offering a straightforward path to modernize control panels without redesign.
Selection and Purchasing
Before purchasing the 1762-L24BWAR, verify your input voltage, sensor types, and output load requirements. Confirm that the relay contact ratings meet your load specifications. If you need fast counting or high-speed sensing, ensure the 4 fast inputs are sufficient.
PLC Source PRO offers genuine Allen-Bradley 1762-L24BWAR modules with fast shipping and competitive pricing. Contact our team to confirm availability and lead times for your project.