Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019 33
The AADvance Safety Controller Chapter 2
External Ethernet, Serial Data and Power Connections
The processor base unit external connections are:
•Earthing Stud
• Ethernet Ports (E1-1 to E3-2)
• Serial Ports (S1-1 to S3-2)
• Redundant +24 Vdc powers supply (PWR-1 and PWR-2)
• Program Enable security key (KEY)
• The FLT connector (currently not used).
Figure 4 - External Connectors on the Processor Base Unit
The power connections supply all three modules with redundant power, each
processor module each have two Serial ports and two Ethernet port
connectors. The KEY connector supports all three processor modules and
helps prevent access to the application unless the Program Enable key is
inserted.
Serial Communications Ports
The serial ports (S1-1 and S1-2; S2-1 and S2-2; S3-1 and S3-2) support the
following signal modes depending on use:
• RS485fd: A four-wire full duplex connection that features different
busses for transmit and receive. This selection must also be used when
the controller is acting as a MODBUS master using the optional four-
wire definition specified in Section 3.3.3 of the MODBUS-over-serial
standard.
• RS485fdmux: A four-wire full-duplex connection with tri-state outputs
on the transmit connections. This must be used when the controller is
acting as a MODBUS Slave on a four-wire bus.
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