Rockwell Automation Allen-Bradley 2711R-T10T, Руководство пользователя

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126 Rockwell Automation Publication 2711R-UM001H-EN-E - April 2021
Appendix D Cable Connections and Communication
Either a standard Ethernet cable or crossover cables such as 2711P-CBL-EX04
can be used when connecting directly to a logic controller or switch.
Cables
The PanelView 800 terminals require category 5 twisted-pair cables. The
maximum cable length between the terminal’s Ethernet port and a 10/100
Base-T port on an Ethernet hub (without repeaters or fiber) is 100 m (328 ft). In
industrial applications, keep the cable length to a minimum.
For additional information, see the Ethernet Design Considerations reference
manual, publication
ENET-RM002 .
Security Considerations
IGMP (Internet Group Management Protocol) is used for IPv4 multicast. A
multicast is communication between a single sender and multiple receivers on
a network. IGMP is used to exchange membership status data between IPv4
routers that support multicasting and members of multicast groups. A router
is an intermediary device on a communication network that expedites
message delivery by finding the most efficient route for a message packet
within a network, or by routing packets from one subnetwork to another. A
subnetwork is a separate part of an organization’s network identified through
IP addressing.
PanelView 800 terminals provide level 2 (full) support for IPv4 multicasting
(IGMP version 2) as described in RFC 1112 and RFC 2236.
SNMP (Simple Network Management Protocol) is used for internal network
management and is not supported.
Ports 137 and 138 are normally open to support the NetBIOS protocol used by
Windows CE.NET similar to other Microsoft® and IBM network operating
systems.
Serial Connections
The terminals have a multi-purpose serial RS-232 port that supports:
• DH-485 communication through a serial connection.
• DF1 full-duplex communication with controllers using direct
connections or modem connections.
• third-party point-to-point communication.
The serial port on the terminal is a 9-pin, male, RS-232 connector. An example
with the 1761-CBL-PM02 cable is shown here: