Allen-Bradley 1762-L24BWA MicroLogix 1200 Programmable Controller
The Allen-Bradley 1762-L24BWA, also cataloged as the 1762-L24BWA Programmable Controller, operates as a dedicated hardware component for industrial discrete processing within MicroLogix 1200 controller platforms. The controller integrates 14 digital 24 VDC inputs (10 standard inputs and 4 fast inputs) and 10 relay outputs powered by an internal 120/240 VAC line voltage supply. It processes incoming field signals across differential input impedances (3.3 kohm for fast inputs 0-3, 2.7 kohm for standard inputs 4-13) to drive physical load executions through individual mechanical relay contacts.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1762-L24BWA |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.50 lbs (0.68 kg) |
| Dimensions | 3.50 in x 4.33 in x 3.43 in (8.9 cm x 11.0 cm x 8.7 cm) |
| Operating Temp | 0 to 55 deg C (32 to 131 deg F) |
| Power Consumption | 120/240 VAC Line Voltage (50/60 Hz) |
| Input Capacity | 14 Channels (10 Standard 24 VDC, 4 Fast 24 VDC) |
| Output Capacity | 10 Channels (Relay Outputs) |
| Input Impedance | 3.3 kohm (Inputs 0-3), 2.7 kohm (Inputs 4 and above) |
| On-State Input Voltage | 14 to 26.4 VDC @ 55 deg C (Inputs 0-3); 10 to 26.4 VDC (Inputs 4+) |
| Off-State Limits | Voltage: 0 to 5 VDC; Max Leakage Current: 1.5 mA |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1762-L24BWA manages backplane bus communication velocity across expanded 1762 I/O module banks via an integrated high-speed expansion interconnect. Firmware flash compatibility ensures deterministic scan execution when interfacing with local digital and analog I/O cards. High-density I/O channel scaling allows local memory image tables to map inputs 0-3 as high-speed counters or latching inputs without degrading standard ladder logic processing speeds. Integrated status indicators provide visual diagnostic synchronization with logic state transitions across the controller front housing.
Frequently Asked Questions
Q: What are the electrical differences between inputs 0-3 and inputs 4-13 on the 1762-L24BWA?
A: Inputs 0-3 feature a nominal impedance of 3.3 kohm and an on-state voltage threshold of 14 to 26.4 VDC (at 55 deg C) optimized for fast-response high-speed signals. Inputs 4 and above feature a 2.7 kohm impedance with a lower on-state voltage threshold of 10 to 26.4 VDC for standard industrial 24 VDC input devices.
Q: Does the 1762-L24BWA require an external 24 VDC power supply to energize its internal processor logic?
A: No. The unit contains an internal AC-to-DC converter that operates directly from a 120/240 VAC primary utility supply to power the processor logic, internal circuitry, and backplane expansion interface.
Field Installation Guidelines
- Power Isolation: Disconnect main 120/240 VAC power sources before mounting, wiring, or attaching 1762 expansion modules to the controller to prevent electric shock or hardware damage.
- Mounting & Clearance: Secure the controller on a 35 mm DIN rail or surface-mount using screws. Maintain a minimum clearance of 50 mm (2 in) on all sides to allow adequate thermal heat dissipation.
- Wiring Terminations: Terminate field input and output wires at the screw terminal block using solid or stranded copper conductors (22 to 14 AWG). Tighten terminal screws to the manufacturer-specified torque limit.
- Noise Isolation: Route 24 VDC input lines and high-voltage AC relay output lines in separate wire channels. Ground the controller functional earth (FE) terminal directly to a low-impedance industrial system ground bus bar.
Allen-Bradley 1762-L24BWA MicroLogix 1200 Programmable Controller
Allen-Bradley 1762-L24BWA MicroLogix 1200 Programmable Controller
The Allen-Bradley 1762-L24BWA, also cataloged as the 1762-L24BWA Programmable Controller, operates as a dedicated hardware component for industrial discrete processing within MicroLogix 1200 controller platforms. The controller integrates 14 digital 24 VDC inputs (10 standard inputs and 4 fast inputs) and 10 relay outputs powered by an internal 120/240 VAC line voltage supply. It processes incoming field signals across differential input impedances (3.3 kohm for fast inputs 0-3, 2.7 kohm for standard inputs 4-13) to drive physical load executions through individual mechanical relay contacts.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1762-L24BWA |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.50 lbs (0.68 kg) |
| Dimensions | 3.50 in x 4.33 in x 3.43 in (8.9 cm x 11.0 cm x 8.7 cm) |
| Operating Temp | 0 to 55 deg C (32 to 131 deg F) |
| Power Consumption | 120/240 VAC Line Voltage (50/60 Hz) |
| Input Capacity | 14 Channels (10 Standard 24 VDC, 4 Fast 24 VDC) |
| Output Capacity | 10 Channels (Relay Outputs) |
| Input Impedance | 3.3 kohm (Inputs 0-3), 2.7 kohm (Inputs 4 and above) |
| On-State Input Voltage | 14 to 26.4 VDC @ 55 deg C (Inputs 0-3); 10 to 26.4 VDC (Inputs 4+) |
| Off-State Limits | Voltage: 0 to 5 VDC; Max Leakage Current: 1.5 mA |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1762-L24BWA manages backplane bus communication velocity across expanded 1762 I/O module banks via an integrated high-speed expansion interconnect. Firmware flash compatibility ensures deterministic scan execution when interfacing with local digital and analog I/O cards. High-density I/O channel scaling allows local memory image tables to map inputs 0-3 as high-speed counters or latching inputs without degrading standard ladder logic processing speeds. Integrated status indicators provide visual diagnostic synchronization with logic state transitions across the controller front housing.
Frequently Asked Questions
Q: What are the electrical differences between inputs 0-3 and inputs 4-13 on the 1762-L24BWA?
A: Inputs 0-3 feature a nominal impedance of 3.3 kohm and an on-state voltage threshold of 14 to 26.4 VDC (at 55 deg C) optimized for fast-response high-speed signals. Inputs 4 and above feature a 2.7 kohm impedance with a lower on-state voltage threshold of 10 to 26.4 VDC for standard industrial 24 VDC input devices.
Q: Does the 1762-L24BWA require an external 24 VDC power supply to energize its internal processor logic?
A: No. The unit contains an internal AC-to-DC converter that operates directly from a 120/240 VAC primary utility supply to power the processor logic, internal circuitry, and backplane expansion interface.
Field Installation Guidelines
- Power Isolation: Disconnect main 120/240 VAC power sources before mounting, wiring, or attaching 1762 expansion modules to the controller to prevent electric shock or hardware damage.
- Mounting & Clearance: Secure the controller on a 35 mm DIN rail or surface-mount using screws. Maintain a minimum clearance of 50 mm (2 in) on all sides to allow adequate thermal heat dissipation.
- Wiring Terminations: Terminate field input and output wires at the screw terminal block using solid or stranded copper conductors (22 to 14 AWG). Tighten terminal screws to the manufacturer-specified torque limit.
- Noise Isolation: Route 24 VDC input lines and high-voltage AC relay output lines in separate wire channels. Ground the controller functional earth (FE) terminal directly to a low-impedance industrial system ground bus bar.
