Installation Instructions
CompactLogix 5370 L2 Controllers
Catalog Numbers 1769-L24ER-QB1B, 1769-L24ER-QBFC1B,
1769-L27ERM-QBFC1B
Prevent Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which ca n cause internal damage and
affect normal operation. Follow these guidelines when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.
Before You Begin
Consider the following before installing a CompactLogix 5370 L2 controller:
• The control system includes a controller, an embedded power supply,
and embedded I/O points.
• The embedded power supply is a 24V DC input, isolated power supply.
• You must connect an external Class 2 or SELV-approved power supply
to provide 24V DC power to the system.
• The controllers have embedded I/O points. You wire the input and
output points via a removable connector.
• The controller supports the use of Compact I/O
1769 CompactBus backplane as local expansion modules.
• You must terminate the end of the CompactBus via a 1769-ECR right
end cap.
modules on the local
2 CompactLogix 5370 L2 Controllers
• You cannot remove nor install Compact I/O modules while the
controller is powered.
ATTENTION: CompactLogix 5370 L2 control systems do not support removal and
insertion under power (RIUP). Removing a 1769 Compact I/O module or end cap will
generate a controller fa ult and may also result in damage to system components.
Install the Secure Digital Card
The CompactLogix 5370 L2 controller is shipped from the factory with the
1784-SD1 SD card installed.
Complete these steps to re-install an SD card that has been removed from the
controller back into the controller or if installing a new SD card into the
controller.
WARNIN G: When you insert or remove the SD card while power is on, an
electrical arc can occur. This could cause an explosion in hazardous location
installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
1. Verify that the SD card is locked or unlocked according to your
preference before installation. Consider the following points:
– If the card is unlocked, the controller can write data to it or read data
from it.
– If the card is locked, the controller can only read data from it.
Rockwell Automation Publication 1769-IN090A-EN-P - April 2012
CompactLogix 5370 L2 Controllers 3
2. Open the door for the SD card.
3. Insert the SD card into the SD card slot.
You can install the SD card in one orientation only. The beveled corner
should be at the bottom. If you feel resistance when inserting the SD
card, pull it out and change the orientation.
4. Gently press the card until it clicks into place.
5. Close the SD card door.
We recommend you close the SD card door during system operation.
Rockwell Automation Publication 1769-IN090A-EN-P - April 2012
4 CompactLogix 5370 L2 Controllers
Mount the System
Mount a CompactLogix 5370 L2 control system on a DIN rail or a panel.
WARNIN G: When used in a Class I, Division 2, hazardous location, this
equipment must be mounted in a suitable enclosure with proper wiring
method that complies with the governing electrical codes.
Available DIN Rails
ATT ENT IO N: This product is grounded through the DIN rail to chassis ground. Use
zinc-plated yellow-chromate steel DIN rail to assure proper grounding. The use of other
DIN rail materials (for example, aluminum or plastic) that can corrode, oxidize, or are
poor conductors, can result in improper or intermittent grounding. Secure DIN rail to
mounting surface approximately every 200 mm (7.8 in.) and use end-anc hors
appropriately.
You can mount the CompactLogix 5370 L2 controller on these DINrails:
• EN 50 022 - 35 x 7.5 mm (1.38 x 0.30 in.)
• EN 50 022 - 35 x 15 mm (1.38 x 0.59 in.)
Rockwell Automation Publication 1769-IN090A-EN-P - April 2012
CompactLogix 5370 L2 Controllers 5
Bottom
Top
CompactLogix 5370 L2
Controller with
Embedded Power
Supply and I/O Points
End Cap
50 mm
(2 in.)
50 mm
(2 in.)
50 mm
(2 in.)
50 mm
(2 in.)
Side Side
Compa ct I/O Mod ule
Compa ct I/O Mod ule
Compa ct I/O Mod ule
Compa ct I/O Mod ule
00:00:BC:2E:69:F6
L24ER
01234567
8 9 10 11 12 13 14 15
01234567
8 9 10 11 12 13 14 15
DC
INPUT
24VDC
SINK\
SOURCE
24VDC
SOURCE
OUTPUT
DC
+24VDC COM FG
00
01
02
03
04
05
06
07
NC
+V
00
01
02
03
04
05
06
07
COM
0
COM
0
08
09
10
11
12
13
14
15
NC
+V
08
09
10
11
12
13
14
15
COM
1
COM
1
DC IN
DC OUT
QB1B
118.00 mm
(4.65 in.)
115.00 mm
(4.53 in.)
35.00 mm (1.38 in.)
105.00 mm
(4.13 in.)
Minimum Spacing
Maintain spacing from enclosure walls, wireways, and adjacent equipment.
Allow 50 mm (2 in.) of space on all sides, as shown. This provides ventilation
and electrical isolation.
System Dimensions
This graphic shows system dimensions for the 1769-L24ER-QB1B controller.
Rockwell Automation Publication 1769-IN090A-EN-P - April 2012