A-B 1769-L27ERM-QBFC1B CompactLogix 5370 L2 Controller

Loading Controller Firmware

The controller ships without working firmware. You must download 

the current firmware before you can use the controller. Initially, the 

1769-L35E firmware is only available on the support website. The 

1769-L20, -L30 firmware is available on the website and on the 

RSLogix 5000 CD. To load firmware, you can use:

• ControlFlash utility that ships with RSLogix 5000 programming software.

• AutoFlash that launches through RSLogix 5000 software when you try to open or create a project and the controller does not have the current firmware.

• a 1784-CF64 CompactFlash card with valid memory already loaded (only supported by the 1769-L35E controller).

See the controller installation instructions for more information about 

using these utilities to load firmware. If you load firmware via an 

EtherNet/IP connection, browse through the Ethernet port, across the 

virtual backplane, and select the 1769-L35E controller.

Loading 1769-SDN Firmware

If you are using a 1769-L35E controller and a 1769-SDN scanner for 

DeviceNet communications and want to take advantage of the new 

explicit messaging feature, you must also upgrade the scanner’s 

firmware to revision 2.2 or later. The updated firmware is available 

with RSLogix 5000 software or you can download it from the support 

website. Use the ControlFlash utility (as described above) to load the firmware.

You must use a DeviceNet connection to update the 1769-SDN 

firmware to revision 2.2. After the firmware is updated to revision 2.2, 

subsequent updates to the 1769-SDN firmware can be initiated via a 

controller backplane connection.

Analog I/O Modules

Choose analog, thermocouple, or RTD modules for these features:

• Individually configurable channels

• Ability to enable and disable channels individually

• Onboard scaling

• Auto calibration of inputs

• Online configuration

• Selectable input filters

• Over-range and under-range detection and indication

• Selectable response to a broken input sensor

• Selectable power source

• Input modules offer both single-ended or differential inputs

• Ability to direct output device operation during an abnormal condition

• High accuracy ratings

The data can be configured on board each module as:

• Engineering Units in volts or milliamps.

• Scaled-for-PID.

• Percent of range.

• Raw/Proportional Data for maximum resolution.

Each 1769 I/O module has a distance rating. 

In 1769 systems, the distance rating is the number of modules between the specific module and the 1769 power supply. 

In a 1768 system, the distance rating is the number of modules between the specific I/O module and the 1768 controller.

I/O Module Overview Each

I/O module includes a built-in removable terminal block with fingersafe cover for connections to I/O sensors and actuators.

The terminal block is behind a door at the front of the module. I/O wiring can be routed from beneath the module to the I/O terminals.

• Once the modules are locked together, the system becomes a rugged assembly.

• Upper and lower tongue-and-groove slots guide the module during installation and secure the module within the system.

• Removable terminal blocks help ease the wiring task.

• Self-lifting, field-wire pressure plates cut installation time.

• The patented bus connector with the lock function enables consistent and system communication.

• A color bar is provided on the front of the module.

• Digital and field circuits are optically isolated.

The 1769 Compact I/O™ modules can be used in the following applications:

• With a CompactLogix™ controller

• For expansion I/O in a MicroLogix™ 1500 controller assembly 

• In an assembly with a 1769-ADN DeviceNet adapter

• In an assembly with a 1769-AENTR Ethernet adapter.

Unless connected to a MicroLogix 1500 base, each bank of I/O modules must include its own power supply.

Install the I/O modules on a panel with two mounting screws or on a DIN rail.