Rockwell Automation 1758-RTU202 DataSite Hardware User Manual - Manual (Page 18)

Publication 1758-UM001D-EN-P - June 2011
18 Installing the Controller
Using Emergency-Stop Switches
When using emergency-stop switches, adhere to the following points:
• Do not program emergency-stop switches in the controller program.
Any emergency-stop switch should turn off all machine power by
turning off the master control relay.
• Observe all applicable local codes concerning the placement and
labeling of emergency-stop switches.
• Install emergency-stop switches and the master control relay in your
system. Make certain that relay contacts have a sufficient rating for your
application. Emergency-stop switches must be easy to reach.
• In the following illustration, input and output circuits are shown with
MCR protection. However, in most applications, only output circuits
require MCR protection.
Using the Lithium Battery
The DataSite controller is equipped with a non-replaceable lithium battery that
is fixed onto a battery seat on the circuit board.
For more information on the battery, see Lithium Battery on page 54 .
TIP
In most applications input circuits do not require MCR
protection; however, if you need to remove power from all field
devices, you must include MCR contacts in series with input
power wiring.
IMPORTANT
Contact your local Rockwell Automation representative to
arrange for a battery replacement if the battery needs to be
replaced.