1761-L32BBB | Allen-Bradley MicroLogix 1000 24V DC, 20-In/10-Out/2-Relays
1761-L32BBB | Allen-Bradley MicroLogix 1000 24V DC, 20-In/10-Out/2-Relays
1761-L32BBB | Allen-Bradley MicroLogix 1000 24V DC, 20-In/10-Out/2-Relays
    1761-L32BBB | Allen-Bradley MicroLogix 1000 24V DC, 20-In/10-Out/2-Relays
1761-L32BBB | Allen-Bradley MicroLogix 1000 24V DC, 20-In/10-Out/2-Relays

1761-L32BBB | Allen-Bradley MicroLogix 1000 24V DC, 20-In/10-Out/2-Relays

Part #: 1761-L32BBB Manufactured by: Allen-Bradley
Regular price
$679.00
Sale price
$679.00
Regular price
6 in Stock
Condition: New-Surplus Original Box
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Product Overview
Allen Bradley MicroLogix 1000 32 Point (I/O) Module, with 24 VDC Input, Output, and Power.
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Product Description P/N: 1761-L32BBB

Description / Specifications

Description 

The 1761-L32BBB is a MicroLogix Controller under the Bulletin 1761 product family. This compact controller features 1K memory, integrated RS232 communication port, Twenty (20) discrete inputs and Ten (10) FET outputs and Two (2) relay outputs.

 

Technical Specifications 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 1761-L32BBB
Controller MicroLogix 1000
I/O Count 32 points
Input Type 24V dc
Memory 1 K EEPROM composed of approximately 737 instruction words and 437 data words.
Communication port RS232
Safety Feature Master Control Relay
Protocol DF1
Product Type Programmable Logic Controller (PLC)
Digital Outputs 10 Source 24V DC, 2 Contact Outputs
No. of Inputs Twenty (20); sinking and sourcing
Input Voltage Type 14 - 30V dc
Output Type Ten (10); FET / Two (2); Relay
Relay Output Voltage Range 24-125VDC; 0-240 VAC
FET Output Voltage Range 0 -30 VDC
Power Supply 20.4 - 26.4 Volts DC
Input Power 7W
Measurements 7.87 x 1.57 x 3.15 inches
Operating Shock 10 G
Non-Operating Shock 20 G

  

 

Information About 1761-L32BBB

The MicroLogix Controller with part number 1761-L32BBB is a compact controller that is manufactured by Allen-Bradley. Compact controllers include integrated power supply, memory, Input and Output channels, and communication ports. This internally embedded devices allow the controller to function without the need of installation of individual modules.

This product is a Programmable Logic Controller (PLC) that allows automation of applications in the factory or process automation areas. This controller is best installed in small scale applications.

This controller requires an enclosure to ensure protection from environment contaminants and noises. It may be installed horizontally or vertically with the use of a standard DIN Rail or through the screw mounts. The clearance required for both mounting is similar. Specifically, required clearance on all sides of the controller shall be 50.8 mm or 2 inches.

Environmental and Mechanical considerations for this device include an operating temperature of 0°C to +40°C (+32°F to +113°F), Operating shock of 9.0g peak acceleration (11 ± 1 ms duration) when panel mounted and 7.0g peak acceleration (11 ± 1 ms duration) when DIN rail mounted.

When wiring the controller, appropriate wire size includes #14 to #22 AWG for solid and #16 to #22 AWG for Stranded wires. The screw head diameter within the controller is 5.5 mm. With this, Allen-Bradley recommends the use of spade lugs with part number 53120-1 for 22-16 AWG and 53123-1 for 16-14 AWG wires. 3rd party lugs equivalent to the recommended ones may also be used.

This controller has integrated memory size of 1K EEPROM memory which is capable of accommodating up to 737 instructions and 437 data words. This controller has integrated Twenty (20) discrete inputs, Ten (10) FET outputs and Two (2) Relay outputs. It operates with 24VDC supply. This controller is capable of implementing discrete control including basic logic operations, time based, counter based and other bit logic operations.

The Allen-Bradley 1761-L32BBB is a programmable controller. It is designed for power supply range of 20.4 to 26.4 Volts DC with integrated Thirty-Two (32) input and output points. This controller has a compact form and requires minimum panel space compared to other similar programmable controllers. The 1761-L32BBB controller can connect to a peer-to-peer network with its RS-232 and DH-485 ports. It can also use the DeviceNet interface (DNI) for high-speed communications.

The 1761-L32BBB’s hand-held programmer (HHP) has six languages built in. This controller has an execution time of only 1.56 milliseconds and a throughput of 1.85 milliseconds for running a typical 500 instructions program. The 1761-L32BBB supports 12 basic logic instructions, 43 applied control instructions and 14 advanced application-specific instructions for a variety of functions.




Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1761-L32BBB
Question: What is the main purpose of the 1761-L32BBB controller?
Date Update:11/06/2025
Answer:

The 1761-L32BBB is a compact programmable logic controller (PLC) designed for small-scale industrial automation applications. It is used to perform basic control tasks such as sequencing, timing, and logic operations in machinery or processes. The controller integrates I/O, power supply, communication, and memory in one unit, making it ideal for applications where space and cost efficiency are important. It is commonly used in conveyor systems, small machinery, and OEM solutions. Its simplicity and reliability make it a popular choice for basic automation tasks.

Question: What are the communication capabilities of this controller?
Date Update:11/06/2025
Answer:

The 1761-L32BBB is equipped with a built-in RS-232 port that supports DF1 full duplex protocol. It enables peer-to-peer communication with other devices such as HMIs, SCADA systems, or programming terminals. The controller also supports DH-485 and can be used with DeviceNet through an external DNI module. Although it lacks modern Ethernet/IP, it can still integrate into small legacy systems. Communication is simple and robust for basic automation tasks.

Question: In which applications is the 1761-L32BBB typically used?
Date Update:11/06/2025
Answer:

This controller is commonly used in small machinery, conveyor systems, HVAC controls, and other compact automation systems. Its integrated I/O and power supply make it suitable for OEM applications and standalone machines. It performs well in environments requiring basic sequencing, on/off control, and safety interlocks. With appropriate I/O and logic functions, it can replace multiple relays and timers. Its simplicity makes it a go-to solution for legacy applications.

Question: Can the 1761-L32BBB be programmed and monitored locally?
Date Update:11/06/2025
Answer:

Yes, the controller can be programmed and monitored using a personal computer or handheld programmer (HHP). It supports six languages on the HHP, providing flexibility for different users. Programming is typically done using RSLogix 500 software over the RS-232 port. It supports online editing, diagnostics, and program download/upload. The interface is intuitive and appropriate for small-scale automation projects.

Question: Is the 1761-L32BBB controller still being manufactured?
Date Update:11/06/2025
Answer:

No, the 1761-L32BBB has been discontinued by Rockwell Automation. While it may still be available through surplus or secondary markets, it is no longer in active production. Customers are encouraged to migrate to newer platforms such as the Micro800 or CompactLogix series. These offer enhanced memory, performance, and connectivity features. For existing installations, documentation and support may still be accessible for maintenance purposes.

IQElectro is not an authorized distributor.
QElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The 1761-L32BBB is a MicroLogix Controller under the Bulletin 1761 product family. This compact controller features 1K memory, integrated RS232 communication port, Twenty (20) discrete inputs and Ten (10) FET outputs and Two (2) relay outputs.

 

Technical Specifications 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 1761-L32BBB
Controller MicroLogix 1000
I/O Count 32 points
Input Type 24V dc
Memory 1 K EEPROM composed of approximately 737 instruction words and 437 data words.
Communication port RS232
Safety Feature Master Control Relay
Protocol DF1
Product Type Programmable Logic Controller (PLC)
Digital Outputs 10 Source 24V DC, 2 Contact Outputs
No. of Inputs Twenty (20); sinking and sourcing
Input Voltage Type 14 - 30V dc
Output Type Ten (10); FET / Two (2); Relay
Relay Output Voltage Range 24-125VDC; 0-240 VAC
FET Output Voltage Range 0 -30 VDC
Power Supply 20.4 - 26.4 Volts DC
Input Power 7W
Measurements 7.87 x 1.57 x 3.15 inches
Operating Shock 10 G
Non-Operating Shock 20 G

  

 

Information About 1761-L32BBB

The MicroLogix Controller with part number 1761-L32BBB is a compact controller that is manufactured by Allen-Bradley. Compact controllers include integrated power supply, memory, Input and Output channels, and communication ports. This internally embedded devices allow the controller to function without the need of installation of individual modules.

This product is a Programmable Logic Controller (PLC) that allows automation of applications in the factory or process automation areas. This controller is best installed in small scale applications.

This controller requires an enclosure to ensure protection from environment contaminants and noises. It may be installed horizontally or vertically with the use of a standard DIN Rail or through the screw mounts. The clearance required for both mounting is similar. Specifically, required clearance on all sides of the controller shall be 50.8 mm or 2 inches.

Environmental and Mechanical considerations for this device include an operating temperature of 0°C to +40°C (+32°F to +113°F), Operating shock of 9.0g peak acceleration (11 ± 1 ms duration) when panel mounted and 7.0g peak acceleration (11 ± 1 ms duration) when DIN rail mounted.

When wiring the controller, appropriate wire size includes #14 to #22 AWG for solid and #16 to #22 AWG for Stranded wires. The screw head diameter within the controller is 5.5 mm. With this, Allen-Bradley recommends the use of spade lugs with part number 53120-1 for 22-16 AWG and 53123-1 for 16-14 AWG wires. 3rd party lugs equivalent to the recommended ones may also be used.

This controller has integrated memory size of 1K EEPROM memory which is capable of accommodating up to 737 instructions and 437 data words. This controller has integrated Twenty (20) discrete inputs, Ten (10) FET outputs and Two (2) Relay outputs. It operates with 24VDC supply. This controller is capable of implementing discrete control including basic logic operations, time based, counter based and other bit logic operations.

The Allen-Bradley 1761-L32BBB is a programmable controller. It is designed for power supply range of 20.4 to 26.4 Volts DC with integrated Thirty-Two (32) input and output points. This controller has a compact form and requires minimum panel space compared to other similar programmable controllers. The 1761-L32BBB controller can connect to a peer-to-peer network with its RS-232 and DH-485 ports. It can also use the DeviceNet interface (DNI) for high-speed communications.

The 1761-L32BBB’s hand-held programmer (HHP) has six languages built in. This controller has an execution time of only 1.56 milliseconds and a throughput of 1.85 milliseconds for running a typical 500 instructions program. The 1761-L32BBB supports 12 basic logic instructions, 43 applied control instructions and 14 advanced application-specific instructions for a variety of functions.




Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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