PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1761-L20BWA-5A is a MicroLogix 1000 Control Unit in the MicroLogix family. This controller requires an input line power supply of 85 to 264V AC. Operating power frequency spans from 47 to 63 Hz. The unit includes twelve 24V DC discrete inputs that support sinking and sourcing connections. It provides eight discrete relay contact outputs for switching AC and DC loads. Four analog inputs handle voltage or current signals. One analog output delivers configurable current or voltage control.
Internal memory consists of a 1 K EEPROM device. This EEPROM stores approximately 737 instruction words and 437 data words. Serial communication takes place over a dedicated RS-232 port using the DF1 protocol. A built-in Master Control Relay safety feature provides operational protection. The hardware is rated for at least 50,000 power cycles. The unit weighs 1.50 lbs, which equals 0.68 kg.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Product Line | MicroLogix 1000 |
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| UPC | 662072766507 |
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| Weight | 1.50 lbs (0.68 kg) |
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| Power Supply | 85-264V ac. |
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| Number of I/O | 25 |
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| Number of Inputs | 12(sinking and sourcing) |
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| Input Operating Range | 14…26.4V DC max @ 55 °C (131 °F) 14…30.0V DC max @ 30 °C (86 °F) |
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| Number of Analog Inputs | 2 Current /Voltage |
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| Analog Input Signal Range | +/-10VDC ; +/- 20mA |
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| Number of Discrete Outputs | 8 Relay Output |
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| Relay Output operating range | 5 - 125V DC / 5 - 264V AC |
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| Number of Analog output | 1 Current / Voltage |
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| Analog Output Signal Range | 0-10VDC; 4-20mA |
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| Operating Frequency | 47-63 Hz |
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| Power cycles | 50,000 minimum |
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| Memory | 1 K EEPROM composed of approximately 737 instruction words and 437 data words. |
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| Communication port | RS232 |
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| Protocol | DF1 |
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| I/O Count | 20 points |
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| Input Type | 24V dc |
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| Output Type | Relay |
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| Analog Circuits | 4 Inputs, 1 Output |
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| Safety Feature | Master Control Relay |
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| Digital Outputs | 8 Contact Outputs |
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| Product Lifecycle Status* | Discontinued/Obsolete |
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TECHNICAL INFORMATION
Features
- Input power supply operates across 85 to 264V AC at 47 to 63 Hz.
- Contains twelve sinking or sourcing 24V DC discrete inputs.
- Provides eight relay contact outputs switching 5 to 125V DC or 5 to 264V AC.
- Features four analog inputs supporting +/-10V DC or +/-20 mA signals.
- Includes one analog output configurable for 0-10V DC or 4-20 mA signals.
- Integrated 1 K EEPROM retains 737 instruction words and 437 data words.
- Embedded RS-232 communication port operates via the DF1 protocol.
- Equipped with a Master Control Relay safety feature.
TECHNICAL INFORMATION
Connections / Interfaces
- One RS-232 serial communication port communicates via the DF1 protocol.
- Terminal connections accept 85 to 264V AC line power.
- Discrete input terminals accept twelve 24V DC signals.
- Output terminals provide eight relay contact circuits.
- Analog terminals interface four analog inputs and one analog output.
TECHNICAL INFORMATION
Installation Guidelines
- Supply voltage must remain within the 85 to 264V AC operating range.
- Input operating voltage is 14 to 26.4V DC up to 55 degrees Celsius.
- At 30 degrees Celsius, maximum input voltage is 30.0V DC.
- Relay output loads must not exceed 125V DC or 264V AC.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure analog input channels for either +/-10V DC or +/-20 mA operation.
- Set the analog output channel to deliver 0-10V DC or 4-20 mA signals.
- Program logic must fit within 737 instruction words and 437 data words.
- Configure the RS-232 communication port to match host DF1 settings.
TECHNICAL INFORMATION
Compatibility
- Compatible with systems communicating over RS-232 using the DF1 protocol.
- Interfaces with sinking and sourcing 24V DC input devices.
- Supports field devices operating between 5 to 125V DC or 5 to 264V AC.
- Connects to sensors operating within +/-10V DC or +/-20 mA ranges.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 1761-L20BWA-5A has been classified as discontinued and obsolete by Rockwell Automation.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with systems communicating over RS-232 using the DF1 protocol. Interfaces with sinking and sourcing 24V DC input devices. Supports field devices operating between 5 to 125V DC or 5 to 264V AC. Connects to sensors operating within +/-10V DC or +/-20 mA ranges.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What supply voltage powers the 1761-L20BWA-5A control unit?
The unit operates on an AC power supply between 85 and 264V AC at 47 to 63 Hz.
What inputs and outputs are built into the 1761-L20BWA-5A?
It has 12 DC inputs, 8 relay outputs, 4 analog inputs, and 1 analog output.
Which serial communication protocol does the unit use?
The controller communicates over an RS-232 serial port utilizing the DF1 protocol.
What pricing is available for the 1761-L20BWA-5A?
Commercial figures are indicative market reference pricing only and are not a final quotation.
