Allen-Bradley 1769-L27ERM-QBFC1B

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1769-L27ERM-QBFC1B

Type

CompactLogix controller

Application

PLC controller

Used with

1769 Compact I/O

Controller tasks

32 tasks 100 programs/task

Communication

EtherNet/IP, DeviceNet via 1769-SDN scanner

EtherNet/IP node

Up to 16 nodes

Embedded I/O

4 high-speed counter modules 4 high-speed counter module outputs 4 universal analog inputs 2 analog output points

Sockets, max

32

Integrated Motion

1769-L27ERM-QBFC1B - As many as 4 axes

Programming

Relay ladder, Structured Text, Function block, SFC

Temperature, operating

0…60 °C (32…140 °F)

Temperature, storage

-40…+85 °C (-40…+185 °F)

Temperature, surrounding air

60 °C (140 °F)

Relative humidity

5…95% noncondensing

Vibration

2 g @ 10…500 Hz

Shock, operating

30 g

Shock, nonoperating

50 g

Emissions

IEC 61000-6-4

ESD immunity

6 kV contact discharges 8 kV air discharges

Radiated RF immunity

10V/m with 1 kHz sine wave 80% AM from 80…6000 MHz

EFT/B immunity

±3 kV at 5 kHz on power ports ±3 kV at 5 kHz on signal ports ±3 kV at 5 kHz on communication ports

Surge transient immunity

±1 kV line-line (DM) and ±2 kV line-earth (CM) on power ports ±1 kV line-line (DM) and ±2 kV line-earth (CM) on signal ports ±2 kV line-earth (CM) on shielded ports ±2 kV line-earth (CM) on communication ports

Conducted RF immunity

10V rms with 1 kHz sine wave 80% AM from 150 kHz…80 MHz

User memory

1 MB

Optional nonvolatile

1784-SD1 card with 1 Gb of available memory (shipped with controller) 1784-SD2 card with 2 Gb of available memory (available for separate ordering)

Number of I/O module

1

Isolation voltage

30V (continuous), Basic Insulation Type, USB to system, Ethernet to system and, Ethernet to Ethernet, Type tested at 500V AC for 60 s

Weight, approx

0.9 kg (1.9 lb)

Technical documents (1)

• Rockwell Automation technical data 1769-TD005

Key features

• 1 MB user memory with SD card option
• Integrated Motion supports as many as 4 axes
• Embedded 4 universal analog inputs and 2 analog outputs
• Programs in ladder, Structured Text, function block and SFC
• Operating temperature 0…60 °C, DIN rail or panel mount

About the Allen-Bradley 1769-L27ERM-QBFC1B

The 1769-L27ERM-QBFC1B is a CompactLogix 1MB DI/O AI/O controller. It has 1 MB of user memory, 32 tasks and EtherNet/IP for up to 16 nodes. Embedded I/O includes 4 universal analog inputs and 2 analog output points, and Integrated Motion handles as many as 4 axes. It takes 24V DC power, weighs approximately 0.9 kg and mounts on DIN rail or panel (technical data 1769-TD005).

What is the 1769-L27ERM-QBFC1B used for?

It controls a machine that needs analog signals and a few motion axes without extra modules, programmed in relay ladder, Structured Text, function block and SFC. Its analog inputs accept thermocouple, RTD, voltage and current signals, and its 2 analog outputs give voltage or current. DeviceNet is reached through a 1769-SDN scanner.

Lifecycle and successor

Active Mature (Rockwell Automation lifecycle status, checked 24 October 2026).

Before you order

What to photograph or confirm so the right unit is quoted.

Read the catalog number 1769-L27ERM-QBFC1B, the series letter and the firmware revision from the label. Send us a photo of the label and we confirm the match before we quote.