Allen-Bradley 1756-L61 User Manual page 30

Chapter 1 Install the 1756-L7x Controller
30
• The 1756-L7x controllers come with the 1756-ESMCAP module
installed. The 1756-L7xXT extreme temperature controller ships with a
1756-ESMCAPXT module installed. For more information on how to
use a 1756-ESMNSE, 1756-ESMNRM, 1756-ESMNSEXT, or
1756-ESMNRMXT module, see
• After the 1756-L7x or 1756-L7xXT controllers lose power, because the
chassis power is turned off or the controller has been removed from a
powered chassis, do not immediately remove the ESM.
Wait until the OK status indicator on the controller transitions from
Green to Solid Red to OFF before you remove the ESM.
• You can use the 1756-ESMNSE module with only a 1756-L73 (8 MB) or
smaller memory-sized controller.
• Use the 1756-ESMNSE module if your application requires that the
installed ESM deplete its residual stored energy to 40 μJoule or less before
transporting it into or out of your application.
• Once it is installed, you cannot remove the 1756-ESMNRM or
1756-ESMNRMXT module from a 1756-L7x or 1756-L7xXT controller.
Complete these steps to remove an ESM module from the controller.
1. Remove the key from the mode switch.
The next step depends on which of the following conditions applies to your
IMPORTANT
application.
• If you are removing the ESM from a powered 1756-L7x controller, go to
• If you are removing the ESM from a 1756-L7x controller that is not
Wait until the OK status indicator on the controller transitions from Green to
Solid Red to OFF before you remove the ESM.
After the OK status indicator transitions to Off, go to
Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
page 28.
step 2.
powered, because the chassis power is turned off or the controller has
been removed from a powered chassis, do not immediately remove
the ESM.
step 2.