Allen-Bradley 1769-L27ERM-QBFC1B CPU Processors
Configured for integrated motion, high-speed counting, and embedded digital and analog signal processing in CompactLogix systems, the Allen-Bradley 1769-L27ERM-QBFC1B (1769-L27ERM-QBFC1B CompactLogix Controller) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
- 1769: CompactLogix hardware platform designation.
- L27ERM: L2 CompactLogix 5370 controller family featuring dual EtherNet/IP ports, Device Level Ring (DLR) redundancy, and integrated CIP Motion capability.
- QBFC1B: Embedded I/O combination code denoting 16 DC inputs, 16 DC outputs, 4 universal analog inputs, 2 analog outputs, and 4 high-speed counter channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L27ERM-QBFC1B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 2.27 kg (5.00 lbs) |
| Dimensions | CompactLogix 5370 L2 integrated controller footprint |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Integrated 24 VDC power supply load |
| User Memory | 1 MB user memory |
| Ethernet Ports | 2 x RJ45 EtherNet/IP (supports DLR topologies) |
| Integrated Digital I/O | 16 24 VDC inputs / 16 24 VDC outputs |
| Integrated Analog I/O | 4 universal analog inputs / 2 analog outputs |
| High-Speed Counters | 4 channels |
| CIP Motion Axis Limit | Up to 4 CIP motion axes |
| Local I/O Expansion | Up to 4 1769 expansion modules |
Backplane Bus Communication and Deterministic Networks
The Allen-Bradley 1769-L27ERM-QBFC1B controller leverages high-speed backplane bus communication velocity to manage real-time task execution across embedded I/O channels and up to 4 local 1769 expansion modules. Designed for high-performance Profinet / EtherNet/IP deterministic networks, the dual-port Ethernet architecture supports Device Level Ring (DLR) topologies to prevent network single points of failure. The processor maintains high I/O density scaling alongside firmware flash compatibility for synchronized CIP Motion axis control and real-time motion loop updates.
Frequently Asked Questions
Q: What network topologies are natively supported by the dual RJ45 ports on the 1769-L27ERM-QBFC1B?
A: The embedded dual EtherNet/IP ports support Device Level Ring (DLR), linear, and traditional star topologies with dedicated IP addressing.
Q: How many local 1769 expansion modules can be attached directly to the 1769-L27ERM-QBFC1B controller bank?
A: The controller supports a maximum of 4 local 1769 Compact I/O expansion modules on its primary rack bank.
Field Installation Guidelines
- Ensure 24 VDC system supply power is completely switched off before mounting or wiring the controller chassis.
- Mount the controller onto standard 35 mm DIN rail or chassis backplate using the integral grounding latches.
- Wire embedded digital, analog, and high-speed counter connections using individual shielded twisted-pair cables for signal lines.
- Terminate Ethernet communication drops using CAT5e or CAT6 industrial-grade RJ45 cabling into the dual front-panel network ports.
- Securely lock adjacent 1769 expansion I/O bus connectors into the side expansion port before energizing power.
Allen-Bradley 1769-L27ERM-QBFC1B CPU Processors
Allen-Bradley 1769-L27ERM-QBFC1B CPU Processors
Configured for integrated motion, high-speed counting, and embedded digital and analog signal processing in CompactLogix systems, the Allen-Bradley 1769-L27ERM-QBFC1B (1769-L27ERM-QBFC1B CompactLogix Controller) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
- 1769: CompactLogix hardware platform designation.
- L27ERM: L2 CompactLogix 5370 controller family featuring dual EtherNet/IP ports, Device Level Ring (DLR) redundancy, and integrated CIP Motion capability.
- QBFC1B: Embedded I/O combination code denoting 16 DC inputs, 16 DC outputs, 4 universal analog inputs, 2 analog outputs, and 4 high-speed counter channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L27ERM-QBFC1B |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 2.27 kg (5.00 lbs) |
| Dimensions | CompactLogix 5370 L2 integrated controller footprint |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Integrated 24 VDC power supply load |
| User Memory | 1 MB user memory |
| Ethernet Ports | 2 x RJ45 EtherNet/IP (supports DLR topologies) |
| Integrated Digital I/O | 16 24 VDC inputs / 16 24 VDC outputs |
| Integrated Analog I/O | 4 universal analog inputs / 2 analog outputs |
| High-Speed Counters | 4 channels |
| CIP Motion Axis Limit | Up to 4 CIP motion axes |
| Local I/O Expansion | Up to 4 1769 expansion modules |
Backplane Bus Communication and Deterministic Networks
The Allen-Bradley 1769-L27ERM-QBFC1B controller leverages high-speed backplane bus communication velocity to manage real-time task execution across embedded I/O channels and up to 4 local 1769 expansion modules. Designed for high-performance Profinet / EtherNet/IP deterministic networks, the dual-port Ethernet architecture supports Device Level Ring (DLR) topologies to prevent network single points of failure. The processor maintains high I/O density scaling alongside firmware flash compatibility for synchronized CIP Motion axis control and real-time motion loop updates.
Frequently Asked Questions
Q: What network topologies are natively supported by the dual RJ45 ports on the 1769-L27ERM-QBFC1B?
A: The embedded dual EtherNet/IP ports support Device Level Ring (DLR), linear, and traditional star topologies with dedicated IP addressing.
Q: How many local 1769 expansion modules can be attached directly to the 1769-L27ERM-QBFC1B controller bank?
A: The controller supports a maximum of 4 local 1769 Compact I/O expansion modules on its primary rack bank.
Field Installation Guidelines
- Ensure 24 VDC system supply power is completely switched off before mounting or wiring the controller chassis.
- Mount the controller onto standard 35 mm DIN rail or chassis backplate using the integral grounding latches.
- Wire embedded digital, analog, and high-speed counter connections using individual shielded twisted-pair cables for signal lines.
- Terminate Ethernet communication drops using CAT5e or CAT6 industrial-grade RJ45 cabling into the dual front-panel network ports.
- Securely lock adjacent 1769 expansion I/O bus connectors into the side expansion port before energizing power.
