8 Rockwell Automation Publication 440R-UM009B-EN-P - February 2014
Chapter 1 About the Interface
About the Interface
The Guardmaster EtherNet/IP Network Interface provide connectivity to
EtherNet/IP networks for Guardmaster Safety Relays.
The interface is for the optical bus backplane that provides connectivity through
two RJ-45 connectors for 2-port pass-through support of daisy chain or ring, and
the existing star and tree network topologies.
Power Up a System
Each time the interface is powered up, the adapter compares the number of I/O
modules present on its backplane to the chassis size value from non-volatile
memory. The adapter does not allow any I/O connection until the number of
I/O modules present equals the chassis size value minus one for the adapter itself.
On power up, the interface assigns an address to every Guardmaster Safety Relay
(up to six) in the backplane. The addressing starts from left to right with the
Guardmaster Safety Relay to the immediate right of the interface taking the first
address of 1.
RIUP Situations
You must observe the following rules for Guardmaster Safety Relay system
construction and the
removal and reinsertion of safety relays.
• Actual Guardmaster Safety Relay identification (such as, electronic
keying) is done when connection establishment requests are received from
the controller or controllers. The interface will not allow any I/O
connections until the number and type of Guardmaster Safety Relays
match the configuration in the connection request.
• A Guardmaster Safety Relay removed under power disrupts
communication of the other Guardmaster Safety Relays in the system.
Connections to all safety relays are disallowed until the entire system,
including the interface, is power cycled to initiate re-addressing the system.
• If safety relays of different types are removed and returned to the wrong
locations, attempts to connect to these safety relays will fail during
verification of the electronic ID (providing that keying has not been
disabled).
• If safety relays of the same type are removed and returned to the wrong
locations, they accept connections from the controller or controllers once
they pass their electronic keying check.
Interface Features
Features of the interface include:
• Use of EtherNet/IP messages encapsulated within standard TCP/UDP/
IP protocol
• Common application layer with ControlNet and DeviceNet networks
• Interfacing via Category 5 rated twisted pair cable
