Rockwell Automation T6200 Compressor Anti-Surge and Capacity Controller - Manual (Page 41)

Hardware Installation/Maintenance
3-19
Wiring for T6200D
Channels 27-30
Discrete Inputs with Excitation from
Controller
These channels are for
placement is for discrete
(On/Off) Inputs only. The
Controller supplies 24
VDC power for the input.
Refer to Figure 2-6
Channels 27-30 do not
have jumper placements.
Contact
+
-
Discrete Input
(24 Vdc/5 mA
excitation)
Circuit
Common
T6200D Controller
Alternate
Open Collector
Transistor
Ethernet Communication Network
The T6200 Controller uses IEEE 802.3 10Base-T Ethernet communication network. Ethernet uses
the Carrier Sense, Multiple Access, Collision Detect (CSMA/CD) datalink protocol, which employs a
broadcast method for communicating with nodes. When a station senses that the network is idle and
it is ready to send, it transmits its data packets to the network. Since all nodes hear the data, each
node checks to see if the packet is intended for it. The station that matches the destination address in
the packet is the one that responds. The collision detection part of CSMA/CD tells nodes to halt
transmission if a collision is detected and to try again later at a randomly determined delay period.
Network Security
The T6200 Controller incorporates automatic control redundancy to insure process equipment
operation in the event of failure. Redundant network components can further enhance overall system
security by maintaining communications in case of certain device malfunction and by allowing online
repair of faulty components. With proper redundancy implementation an Ethernet network can detect
when a particular path cannot pass data and then automatically switch to a backup path. Refer to
T6200 Equipment Selection and Planning Guide for more information on network security.
Ethernet Network Connectors
The T6200 Controller includes two individual IEEE 802.3 10Base-T Ethernet connections (ENET1 and
ENET2) with standard RJ-45 connectors to facilitate control network communication. Refer to Figure
3-8 (Integral Termination Panel), Figure 3-9 (Redundant Remote I/O Backplane) or Figure 3-10 (Non-
Redundant Dual Remote I/O Backplane) for connector location and Figure 3-12 for Ethernet ENET1
and ENET2 connector pin assignments.
Note on Figure 3-10 (Non-Redundant Dual Remote I/O Backplane) ENET1 on the Primary Control
Board is referenced as ENET1P and ENET2 is referenced as ENET2P. ENET1 on the Second Control
Board is referenced as ENET1S and ENET2 is referenced as ENET2S.