Overview
Product Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L23-QBFC1B |
| Brand | Allen-Bradley |
| Product Type | CompactLogix Packaged Controller |
| Product Line | CompactLogix |
| Product Family | CompactLogix PAC |
| User Memory | 512 KB |
| Module Type | Processor Module |
| Communication Interface | Two RS-232 ports |
| Communication Protocols | Port 1: DF1 / ASCII / DH-485; Port 2: DF1 / DH-485 |
| Embedded Digital Inputs | 16 points, 24 VDC |
| Embedded Digital Outputs | 16 points, 24 VDC |
| Embedded Analog Inputs | 4 channels, 0-10.5 VDC / 0-21 mA |
| Analog Input Configuration | Differential or single-ended |
| Embedded Analog Outputs | 2 channels, 0-10.5 VDC / 0-21 mA |
| Analog Output Configuration | Single-ended |
| High-Speed Counter Inputs | 4 HSC inputs |
| Mounting | DIN Rail / Panel |
| Enclosure Type | Open-type |
| Operating Temperature | 0 to 60 deg C (32 to 140 deg F) |
| Storage Temperature | -40 to 85 deg C (-40 to 185 deg F) |
| Vibration | 5 g at 10 to 500 Hz |
| Operating Shock | 30 g |
| Replacement Terminal Block | 1769-RTBN18 |
| Wire Material | Copper, 90 deg C |
| Solid Wire Size | 22-14 AWG |
| Stranded Wire Size | 22-16 AWG |
| Series | A and B |
| Weight | 3.75 lb (1.70 kg) |
| UPC | 612598350742 |
Integrated I/O Configuration
The controller combines 16 digital inputs and 16 digital outputs, both operating at 24 VDC. In addition, four embedded analog input channels accept voltage or current signals. Their differential or single-ended configuration supports different analog signal wiring requirements.
The two analog output channels provide voltage or current signals through single-ended connections. Meanwhile, four high-speed counter inputs support applications that require pulse counting and high-speed signal monitoring.
Communication and Controller Memory
The 1769-L23-QBFC1B provides two built-in RS-232 ports for serial communication. Port 1 supports DF1, ASCII, and DH-485 protocols, while Port 2 supports DF1 and DH-485. Therefore, the available communication protocols differ between the two ports and should be considered when planning serial connections.
Its 512 KB user memory provides storage for the controller application and associated control logic. This memory capacity is an important selection parameter when evaluating the controller for an existing CompactLogix installation.
Mounting and Wiring Requirements
The controller supports both DIN rail and panel mounting. Its open-type enclosure requires consideration of the installation environment and the applicable enclosure protection requirements.
For wiring, the specified conductors are copper wire rated at 90 deg C. Solid conductors range from 22 to 14 AWG, while stranded conductors range from 22 to 16 AWG. The replacement terminal block part number is 1769-RTBN18.
Frequently Asked Questions
Q: How much user memory does the 1769-L23-QBFC1B provide?
A: It provides 512 KB of user memory for controller applications.
Q: How many built-in I/O points does this controller have?
A: It has 16 digital inputs, 16 digital outputs, four analog inputs, and two analog outputs. It also provides four high-speed counter inputs.
Q: Which communication protocols does the 1769-L23-QBFC1B support?
A: It provides two RS-232 ports. Port 1 supports DF1, ASCII, and DH-485, while Port 2 supports DF1 and DH-485.
Q: Which replacement terminal block is specified for this controller?
A: The specified replacement terminal block is 1769-RTBN18.
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