Rockwell Automation 1753-L28BBB-M_P GuardPLC 1600 Controllers - Manual (Page 12)

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Rockwell Automation Publication 1753-IN001C-EN-P - June 2010
Example: Connecting Actuators to the Outputs
The digital outputs can be pulsed with the safety-related digital inputs of the same device. This
enables short-circuit or line-break monitoring to be carried out (that is, emergency stop buttons
to conform to Cat. 4 in EN954-1).
Make Communication Connections
The controller supports separate connections for safety and nonsafety-related communication.
Connections for Safety-related Communication
The controller has four 10/100BaseT, RJ45 connectors to provide communication via
GuardPLC Ethernet protocol to distributed I/O and other GuardPLC controllers, OLE for
Process Control (OPC) servers, and with the programming software. Connectors 1 and 2 are on
the bottom side on the left. Connectors 3 and 4 are on the top side on the left. All four
connectors and the GuardPLC processor are connected together by an internal Ethernet switch.
The switches are auto-detect. Either crossover or straight-through Ethernet cabling can be used.
Star or line configurations are available. Make sure that a network loop is not generated. Data
packets must be able to reach a node only via a single path.
TIP Inductive loads can be connected without a protection diode on the load.
However, Rockwell Automation strongly recommends that a protection diode be
fitted directly to the load to suppress any interference voltage. A 1N4004 diode
is recommended.
ATTENTION: Pulse outputs may not be used as safety-related outputs.
TIP For more information on output wiring, see the GuardPLC Controller Systems
User Manual, publication
1753-UM001 .
DO 1 DO 2 DO 3 DO 4 L- L-