Rockwell Automation 1788-CNCR ControlNet Daughtercard Installation Instructions - Manual (Page 6)

6 ControlNet Daughtercard
Publication 1788-IN002C-EN-P - April 2004
About the Daughtercards
The network daughtercard architecture defines a common
hardware and software interface that several different
network interface cards will support. This allows products
that have been designed to support the network
daughtercard option to support several different Rockwell
Automation networks.
About the ControlNet Daughtercard
You can install the 1788-CNC or -CNCR ControlNet daughtercard in any host device that
supports the ControlNet daughtercard.
(1)
Every ControlNet network requires at least one module that is able to store parameters and
configure the network with those parameters upon start-up. This module is called a ‘keeper’
since it keeps the network configuration.
Any 1788-CNC or -CNCR card can keep the network parameters at any legal node address
(01 to 99). Multiple devices on any one network can act as the network keeper. Each device
capable of being the network keeper acts to back up the current keeper. This backup function
is automatic and requires no action on your part.
WARNING
• If you connect or disconnect the communications cable with
power applied to this module or any device on the network, an
electrical arc can occur. This could cause an explosion in
hazardous location installations.
• If you insert or remove the card while host 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)
The host device must provide a suitable power source per the restrictions in the specifications table.
IMPORTANT
On the 1788-CNC or -CNCR card, the non-volatile keeper data is erased
when a firmware update is performed.