Allen-Bradley 1769-L27ERM-QBFC1B CompactLogix 5370 L2 Controller
The Allen-Bradley 1769-L27ERM-QBFC1B, also cataloged as the 1769-L27ERM-QBFC1B CompactLogix 5370 L2 Controller, operates as a dedicated hardware component for integrated motion, high-speed counting, and embedded I/O logic execution within EtherNet/IP networks. This PAC incorporates 1 MB of user memory, embedded digital/analog/HSC channels, and multi-axis CIP Motion execution capability to control field actuators and drive loops over deterministic Ethernet fabrics.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L27ERM-QBFC1B |
| Brand | Allen-Bradley |
| Origin | Malaysia |
| Weight | 1.25 kg (2.75 lbs) |
| Dimensions | Standard 1769 L2 form factor |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | Embedded 24 VDC power supply |
| User Memory | 1 MB integrated memory (1 GB SD card included) |
| On-Board Digital I/O | 16 24 VDC inputs / 16 24 VDC outputs |
| On-Board Analog I/O | 4 universal analog inputs (V, mA, TC, RTD) / 2 analog outputs |
| High-Speed Counters | 4 high-speed counter channels |
| Motion Axis Limit | 4 CIP motion axes with kinematics |
| Communication Ports | 2 x RJ45 EtherNet/IP (DLR capable), 1 x USB port |
| Local Expansion | Up to 4 1769 I/O expansion modules |
EtherNet/IP Deterministic Network Performance
The controller utilizes two embedded RJ45 network interfaces connected through an internal layer-2 switch, enabling Device Level Ring (DLR), linear, and star topologies for high-speed deterministic control. The EtherNet/IP stack manages up to 16 EtherNet/IP nodes, 120 TCP connections, and 256 total controller connections while hosting up to 4 axes of CIP Motion over Ethernet. Firmware processing supports up to 32 controller tasks with 100 programs per task, ensuring predictable scan timing across both discrete embedded I/O points and backplane bus communication velocity with local 1769 expansion modules.
Frequently Asked Questions
Q: What is the maximum number of local 1769 expansion modules supported by the 1769-L27ERM-QBFC1B?
A: The controller supports a maximum of 4 local 1769 Compact I/O expansion modules attached directly to the right side of the main unit assembly.
Q: Does this controller require a lithium battery to back up user program memory during power loss?
A: No. The CompactLogix 5370 L2 series uses non-volatile flash memory supported by an internal energy storage module, eliminating the maintenance requirements of traditional lithium batteries.
Q: Can the two EtherNet/IP ports be configured with two separate IP addresses for subnet isolation?
A: No. The two physical RJ45 ports function as an embedded switch sharing a single network interface and IP address, designed primarily to support fault-tolerant Device Level Ring (DLR) and linear daisy-chain network topologies.
Field Installation Guidelines
Mount the controller onto a standard 35 mm DIN rail or fasten it directly to an enclosure backplate using M4 hardware. Ensure the enclosure provides clean, filtered air to maintain ambient operating temperatures between 0 and 60 deg C. Connect the embedded power supply terminals to a regulated 24 VDC power source with short, thick conductors to minimize voltage drop under peak current loads. Terminate all field wiring for the embedded digital, analog, and high-speed counter channels into the designated terminal blocks, keeping signal lines physically segregated from high-voltage AC cables and VFD drive power conductors. Ensure proper shield grounding at the terminal block chassis connections to prevent noise coupling on universal analog input loops (voltage, current, thermocouple, RTD).
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
Recently Viewed
Express Shipping
Extensive Inventory
Quality Assurance
