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
$825.00
$825.00
4 in Stock
Condition: New – Open box
Shipping calculated at checkout.
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 Allen-Bradley 1761-L32BBB is a MicroLogix 1000 programmable controller designed for compact automation tasks requiring reliable digital and high-speed input handling. It includes 20 DC inputs, 10 MOSFET outputs, and 2 relay outputs, making it suitable for mixed-signal control applications. Powered by 24 VDC, this controller is widely used in machine control, packaging, small process systems, and OEM automation equipment.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Programmable Logic Controllers (PLC)
Part Number 1761-L32BBB
Subcategory MicroLogix 1000
Type Controller
Series / Platform MicroLogix 1000
Power Supply 24 VDC (20.4–26.4 VDC operating range)
Total I/O 32 points
Digital Inputs 20 × 24 VDC sink/source
High-Speed Input 1 channel, 6.6 kHz
Input Filtering 0.5–16 ms standard / 0.075–16 ms HSC
Digital Outputs 10 MOSFET sourcing
Relay Outputs 2 (5–125 VDC / 5–264 VAC)
MOSFET Output Rating 20.4–26.4 VDC, up to 1.5 A/point (30 °C)
Relay Contact Rating 2 A @ 24 VDC, 1 A @ 125 VDC, 2.5 A @ 240 VAC
Memory 1 KB EEPROM (737 instruction words + 437 data words)
Communication RS-232 mini-DIN
Supported Protocols DF1, Modbus RTU slave
Inrush Current 30 A for 4 ms
Operating Temperature 0–55 °C
Storage Temperature –40–85 °C
Enclosure Rating IP20
Mounting DIN rail or panel mount
Standards C-TICK, CE, GOST, KC
Applications Small machine control, counting systems, OEM automation, monitoring

 

 

 

Information About 1761-L32BBB

The 1761-L32BBB is part of the MicroLogix 1000 series, offering fixed I/O architecture with a total of 32 integrated points. It supports DC sinking/sourcing inputs, MOSFET outputs for fast switching, and two relay contacts for AC or higher-voltage loads. The controller includes a built-in RS-232 port with DF1 communication and optional Modbus RTU slave capability, making it compatible with HMIs, metering systems, and serial networks. Its internal 1 KB EEPROM stores up to 737 instruction words and 437 data words, ensuring data retention without battery backup. With a 6.6 kHz high-speed input and programmable input filtering, the unit handles precise counting and fast sensor feedback. The controller operates from a 24 VDC supply and installs via DIN rail or panel mount, supporting industrial temperatures and global regulatory standards.

Key Features:

  • Integrated I/O: 20 DC inputs, 10 MOSFET outputs, and 2 relay outputs for mixed-voltage control.
  • High-Speed Input: 6.6 kHz channel for counters, encoders, and fast pulse applications.
  • Non-Volatile Memory: 1 KB EEPROM retains program and data without a battery.
  • Flexible Communication: RS-232 mini-DIN port supports DF1, Modbus RTU slave, and connection to HMIs or SCADA.
  • Robust Output Options: MOSFET outputs for fast DC switching and relay outputs for AC/DC loads to 264 VAC.
  • Wide Input Range: 20.4–26.4 VDC input voltage with configurable filtering for noisy environments.
  • Industrial-Ready: IP20 enclosure, 0–55 °C operating range, and 50,000 power cycles minimum.
  • Compact Installation: DIN-rail or panel mounting for tight control cabinets.

The 1761-L32BBB provides durable, versatile control for small automation systems requiring mixed input/output functionality.

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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.
IQElectro 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 Allen-Bradley 1761-L32BBB is a MicroLogix 1000 programmable controller designed for compact automation tasks requiring reliable digital and high-speed input handling. It includes 20 DC inputs, 10 MOSFET outputs, and 2 relay outputs, making it suitable for mixed-signal control applications. Powered by 24 VDC, this controller is widely used in machine control, packaging, small process systems, and OEM automation equipment.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Programmable Logic Controllers (PLC)
Part Number 1761-L32BBB
Subcategory MicroLogix 1000
Type Controller
Series / Platform MicroLogix 1000
Power Supply 24 VDC (20.4–26.4 VDC operating range)
Total I/O 32 points
Digital Inputs 20 × 24 VDC sink/source
High-Speed Input 1 channel, 6.6 kHz
Input Filtering 0.5–16 ms standard / 0.075–16 ms HSC
Digital Outputs 10 MOSFET sourcing
Relay Outputs 2 (5–125 VDC / 5–264 VAC)
MOSFET Output Rating 20.4–26.4 VDC, up to 1.5 A/point (30 °C)
Relay Contact Rating 2 A @ 24 VDC, 1 A @ 125 VDC, 2.5 A @ 240 VAC
Memory 1 KB EEPROM (737 instruction words + 437 data words)
Communication RS-232 mini-DIN
Supported Protocols DF1, Modbus RTU slave
Inrush Current 30 A for 4 ms
Operating Temperature 0–55 °C
Storage Temperature –40–85 °C
Enclosure Rating IP20
Mounting DIN rail or panel mount
Standards C-TICK, CE, GOST, KC
Applications Small machine control, counting systems, OEM automation, monitoring

 

 

 

Information About 1761-L32BBB

The 1761-L32BBB is part of the MicroLogix 1000 series, offering fixed I/O architecture with a total of 32 integrated points. It supports DC sinking/sourcing inputs, MOSFET outputs for fast switching, and two relay contacts for AC or higher-voltage loads. The controller includes a built-in RS-232 port with DF1 communication and optional Modbus RTU slave capability, making it compatible with HMIs, metering systems, and serial networks. Its internal 1 KB EEPROM stores up to 737 instruction words and 437 data words, ensuring data retention without battery backup. With a 6.6 kHz high-speed input and programmable input filtering, the unit handles precise counting and fast sensor feedback. The controller operates from a 24 VDC supply and installs via DIN rail or panel mount, supporting industrial temperatures and global regulatory standards.

Key Features:

  • Integrated I/O: 20 DC inputs, 10 MOSFET outputs, and 2 relay outputs for mixed-voltage control.
  • High-Speed Input: 6.6 kHz channel for counters, encoders, and fast pulse applications.
  • Non-Volatile Memory: 1 KB EEPROM retains program and data without a battery.
  • Flexible Communication: RS-232 mini-DIN port supports DF1, Modbus RTU slave, and connection to HMIs or SCADA.
  • Robust Output Options: MOSFET outputs for fast DC switching and relay outputs for AC/DC loads to 264 VAC.
  • Wide Input Range: 20.4–26.4 VDC input voltage with configurable filtering for noisy environments.
  • Industrial-Ready: IP20 enclosure, 0–55 °C operating range, and 50,000 power cycles minimum.
  • Compact Installation: DIN-rail or panel mounting for tight control cabinets.

The 1761-L32BBB provides durable, versatile control for small automation systems requiring mixed input/output functionality.

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