Programmable Controller | Allen-Bradley 1762-L40BWAR MicroLogix 1200
The Allen-Bradley 1762-L40BWAR is a compact 40-point programmable logic controller in the MicroLogix 1200 family designed for micro and small automation applications. Powered by a wide 120 to 240 VAC supply, it integrates twenty-four 24 VDC inputs and sixteen electromechanical relay outputs alongside dual mini-DIN serial communication ports.
Dual Communication Architecture
This unit features two 8-pin mini-DIN circular serial ports on its chassis, permitting simultaneous communication tasks without requiring cable disconnection. The front primary serial port supports DF1, DH-485, Modbus RTU, and ASCII protocols for continuous connections to HMIs, SCADA systems, or programming workstations, while the second dedicated port allows online editing and testing.
Embedded I/O and Sensor Power
The controller offers 24 digital DC inputs, divided into 20 standard inputs (channels 4 and higher) and 4 fast inputs (channels 0–3) capable of high-speed pulse tracking. The 16 relay output channels handle both AC (120–240 VAC) and DC (24–125 VDC) loads. An internal 24 VDC auxiliary power supply provides up to 400 mA to power connected sensors directly from the controller.
The 1762-L40BWAR provides a versatile 120/240 VAC line-powered automation engine featuring dual serial ports and relay output isolation for reliable small-scale industrial control.
| Parameter | Specification |
|---|---|
| Model | 1762-L40BWAR |
| Brand | Allen-Bradley / Rockwell Automation |
| Series | MicroLogix 1200 |
| Input Power | 120 to 240 VAC (47–63 Hz) |
| Power Supply Usage | 82 VA |
| Inrush Current | 25 A for 8 ms (at 120 VAC) / 40 A for 4 ms (at 240 VAC) |
| Digital Inputs | 24 total (20 standard 24 VDC sink/source, 4 fast 24 VDC) |
| Digital Outputs | 16 relay outputs |
| Relay Contact Rating | 24–125 VDC, 120–240 VAC |
| Auxiliary Sensor Power Output | 24 VDC at 400 mA (400 µF max load) |
| Communication Ports | Two (2) 8-pin mini-DIN circular serial ports |
| Supported Protocols | DF1, DH-485, Modbus, ASCII |
| Operating Temperature | 0 to 55 deg C (32 to 131 deg F) |
| Weight | 2.13 lbs (0.96 kg) |
Frequently Asked Questions
Q: What is the purpose of the secondary programming port on the 1762-L40BWAR? A: The second 8-pin mini-DIN port allows engineers to perform online ladder edits, monitor test functions, and download program revisions simultaneously without disconnecting existing HMI or SCADA networks attached to the primary port.
Q: Can the 24 VDC sensor power supply be used to power the controller's output load circuits? A: No, the 24 VDC sensor supply has its common internally connected to chassis ground and is rated for a maximum of 400 mA; it must be reserved for input field sensors rather than output load switching.
Programmable Controller | Allen-Bradley 1762-L40BWAR MicroLogix 1200
Programmable Controller | Allen-Bradley 1762-L40BWAR MicroLogix 1200
The Allen-Bradley 1762-L40BWAR is a compact 40-point programmable logic controller in the MicroLogix 1200 family designed for micro and small automation applications. Powered by a wide 120 to 240 VAC supply, it integrates twenty-four 24 VDC inputs and sixteen electromechanical relay outputs alongside dual mini-DIN serial communication ports.
Dual Communication Architecture
This unit features two 8-pin mini-DIN circular serial ports on its chassis, permitting simultaneous communication tasks without requiring cable disconnection. The front primary serial port supports DF1, DH-485, Modbus RTU, and ASCII protocols for continuous connections to HMIs, SCADA systems, or programming workstations, while the second dedicated port allows online editing and testing.
Embedded I/O and Sensor Power
The controller offers 24 digital DC inputs, divided into 20 standard inputs (channels 4 and higher) and 4 fast inputs (channels 0–3) capable of high-speed pulse tracking. The 16 relay output channels handle both AC (120–240 VAC) and DC (24–125 VDC) loads. An internal 24 VDC auxiliary power supply provides up to 400 mA to power connected sensors directly from the controller.
The 1762-L40BWAR provides a versatile 120/240 VAC line-powered automation engine featuring dual serial ports and relay output isolation for reliable small-scale industrial control.
| Parameter | Specification |
|---|---|
| Model | 1762-L40BWAR |
| Brand | Allen-Bradley / Rockwell Automation |
| Series | MicroLogix 1200 |
| Input Power | 120 to 240 VAC (47–63 Hz) |
| Power Supply Usage | 82 VA |
| Inrush Current | 25 A for 8 ms (at 120 VAC) / 40 A for 4 ms (at 240 VAC) |
| Digital Inputs | 24 total (20 standard 24 VDC sink/source, 4 fast 24 VDC) |
| Digital Outputs | 16 relay outputs |
| Relay Contact Rating | 24–125 VDC, 120–240 VAC |
| Auxiliary Sensor Power Output | 24 VDC at 400 mA (400 µF max load) |
| Communication Ports | Two (2) 8-pin mini-DIN circular serial ports |
| Supported Protocols | DF1, DH-485, Modbus, ASCII |
| Operating Temperature | 0 to 55 deg C (32 to 131 deg F) |
| Weight | 2.13 lbs (0.96 kg) |
Frequently Asked Questions
Q: What is the purpose of the secondary programming port on the 1762-L40BWAR? A: The second 8-pin mini-DIN port allows engineers to perform online ladder edits, monitor test functions, and download program revisions simultaneously without disconnecting existing HMI or SCADA networks attached to the primary port.
Q: Can the 24 VDC sensor power supply be used to power the controller's output load circuits? A: No, the 24 VDC sensor supply has its common internally connected to chassis ground and is rated for a maximum of 400 mA; it must be reserved for input field sensors rather than output load switching.
