Rockwell Automation AADvance Controller Solutions Handbook - Manual (Page 49)

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Document: 553631
(ICSTT-RM447J_EN_P) Issue: 09:
1-37
Ethernet, Serial Data and Power Connections
The external connections for Earthing, Ethernet (E1-1 to E3-2), serial data (S1-1 to
S3-2) and the +24V dc Redundant powers supplies (PWR-1 and PWR-2) are all
located on the T9100 Processor Base Unit. There are two serial data and two
Ethernet connectors for each processor module. Two connectors for the dual
redundant power supplies, a stud for the Earth and a connector for the security device
(KEY) also known as the Program Enable Key.
Note: The FLT connector is not used.
Serial Communications
The serial ports (S1-1 & S1-2, S2-1 & S2-2, S3-1 & S3-2) support the following
signal modes depending upon use:
 RS485fd: A four-wire full duplex connection that features separate busses for
transmit and receive. This selection should also be used when the controller is
acting as a Modbus master using the optional four-wire definition described 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 should be used when the controller is acting as a
Modbus slave on a four-wire bus.
 RS485hdmux: A two-wire half duplex connection appropriate for or master slave
or slave use. This is shown in the Modbus-over-serial standard.