Allen‑Bradley 1769‑L27ERM‑QBFC1B | CompactLogix Controller
Introduction:
The Allen‑Bradley 1769‑L27ERM‑QBFC1B is a CompactLogix 5370 L2 controller with 1MB memory, dual Ethernet ports, 16 discrete I/O, 4 analog inputs, 2 analog outputs, and 4 HSCs.
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Allen-Bradley 1769-L27ERM-QBFC1B CompactLogix 5370 L2 Controller with Embedded I/O
The Allen-Bradley 1769-L27ERM-QBFC1B is a powerful CompactLogix 5370 L2 controller. It belongs to Rockwell Automation’s advanced PAC family. This controller features 1MB of user memory. It includes two (2) Ethernet/IP ports and one (1) USB port. The 1769-L27ERM-QBFC1B has embedded digital and analog I/O for small to medium applications.
Technical Specifications of the 1769-L27ERM-QBFC1B Controller
This Allen-Bradley 1769-L27ERM-QBFC1B controller delivers integrated control and motion. Its compact design reduces panel space by 40%.
Memory and Processing:
User Memory: 1 MB.
Non-Volatile Memory: 1 GB Secure Digital (SD) card (included).
Maximum Tasks: 32 tasks.
Maximum Programs per Task: 100 programs.
Programming Languages: Structured text, function block, SFC, and relay ladder (safety task only).
Communication Ports:
Ethernet/IP Ports: Two (2) ports supporting DLR, linear, and star topologies.
USB Port: One (1) port for programming and temporary connection.
TCP Connections: 120 maximum.
CIP Connections: 256 maximum.
CIP Unconnected Messages: 256 (backplane + Ethernet).
Multicast Produced Tags: 32 maximum.
Unicast Produced Tags: 128 maximum.
Embedded Digital I/O:
Digital Inputs: Sixteen (16) 24V DC sinking/sourcing.
Digital Outputs: Sixteen (16) 24V DC sourcing.
High-Speed Counter (HSC) Outputs: Four (4).
Embedded Analog I/O:
Analog Inputs: Four (4) universal (differential or single ended).
Analog Outputs: Two (2) single ended.
Analog Input Types: Thermocouple (J, K, T, E, R, S, B, N, C), voltage, current, RTD (Platinum 385/3916, Copper 426, Nickel 672/618, Nickel-Iron 518), and resistance.
Analog Output Types: Voltage (0-5V, 1-5V, 0-10V, -10V to +10V) and current (0-20 mA, 4-20 mA).
Analog Resolution: 15 bits plus sign (bipolar) and 16 bits (unipolar).
Converter Type: Sigma-Delta.
Update Time: User defined from 11 to 5000 ms.
Motion Control:
Motion over Ethernet: Supports up to 16 axes over EtherNet/IP.
Expansion Capabilities:
Maximum Local I/O Modules: Four (4) 1769 Compact I/O modules.
Maximum Expansion Banks: One (1) bank.
Replacement Terminal Block: 1769-RTBN18.
Wire Size (Solid): 22 to 14 AWG.
Wire Size (Stranded): 22 to 16 AWG.
Wire Type: Copper, rated for 90°C.
Physical Specifications:
Mounting: DIN rail only.
Shipping Weight: 3 pounds (1.36 kg).
Shipping Dimensions: 11 x 8 x 6 inches.
Environmental and Power Features
The Allen-Bradley 1769-L27ERM-QBFC1B includes a built-in 24V DC power supply. It features built-in energy storage, eliminating the need for lithium batteries. This controller operates reliably without a replaceable battery. The removable 1GB SD card provides non-volatile memory for program backup. This improves data integrity and simplifies maintenance.
Communication and Integration Capabilities
The 1769-L27ERM-QBFC1B offers flexible networking for modern automation systems. The dual Ethernet ports support Device Level Ring (DLR) topology for network redundancy. You can also use linear or traditional star topologies. These ports communicate with HMI, SCADA, and DCS systems. The controller also connects to OPC servers, protocol converters, and third-party tools. For distributed I/O, use Allen-Bradley Flex I/O or POINT I/O families. For DeviceNet networks, add a 1769-SDN module or third-party option.
Packing List
One Allen-Bradley 1769-L27ERM-QBFC1B CompactLogix 5370 L2 controller.
One 1GB Secure Digital (SD) card (pre-installed).
One 1769-RTBN18 removable terminal block.
One basic installation instruction sheet.
Frequently Asked Questions (FAQ)
1. Does the 1769-L27ERM-QBFC1B controller require a battery?
No, this controller has built-in energy storage. The Allen-Bradley 1769-L27ERM-QBFC1B does not need a lithium battery for memory retention.
2. How many local I/O modules can I add to this controller?
You can add up to four (4) 1769 Compact I/O modules. The 1769-L27ERM-QBFC1B supports one (1) expansion bank for local expansion.
3. What types of analog inputs does this controller support?
The embedded analog inputs support thermocouples (J, K, T, E, R, S, B, N, C), RTDs, voltage, current, and resistance signals. This is very versatile.
4. Can this controller handle motion control applications?
Yes, the Allen-Bradley 1769-L27ERM-QBFC1B supports integrated motion over EtherNet/IP. It controls up to 16 axes directly from the controller.
5. What network topologies do the dual Ethernet ports support?
The two Ethernet/IP ports on the 1769-L27ERM-QBFC1B support Device Level Ring (DLR), linear, and traditional star topologies. DLR provides network redundancy.