Specifications

10. CONNECTION TO ALLEN-BRADLEY PLC
10.3 Ethernet Connection
10 - 15
CONNECTION TO ALLEN-BRADLEY PLC
10
10.3.2 System configuration for connecting to ControlLogix, CompactLogix or
FlexLogix (Ethernet connection type: EtherNet/IP (AB Tag))
*1 Allen-Bradley product manufactured by Rockwell Automation, Inc. For details of the product, contact Rockwell Automation, Inc.
*2 The destination connected with the twisted pair cable varies with the configuration of the applicable Ethernet network system.
Connect to the Ethernet module, hub, transceiver or other system equipment corresponding to the applicable Ethernet network
system.
Use cables, connectors, and hubs that meet the IEEE802.3 10BASE-T/100BASE-TX standards.
*3 A length between a hub and a node.
The maximum distance differs depending on the Ethernet device to be used.
The following shows the number of the connectable nodes when a repeater hub is used.
• 10BASE-T: Max. 4 nodes for a cascade connection (500m)
• 100BASE-TX: Max. 2 nodes for a cascade connection (205m)
When switching hubs are used, the cascade connection between the switching hubs has no logical limit for the number of
cascades.
For the limit, contact the switching hub manufacturer.
*4 The connectable EtherNet/IP communication module differs depending on the PLC series.
(ControlLogix5550/5555/5560)
1756-ENET (10Mbps), 1756-ENBT (10/100Mbps)
(ControlLogix5570)
1756-EN2TR (10/100Mbps)
PLC Connection cable GOT
Number of connectable
equipment
Series
EtherNet/IP
communication module
*1
Communi
cation
Type
Cable model
*2
Maximum
segment
length
*3
Option device Model
ControlLogix
1756-ENET (10Mbps)
*4
1756-ENBT (10/100Mbps)
*4
Ethernet
• 10BASE-T Shielded
twisted pair cable (STP) or
unshielded twisted pair
cable (UTP) of category 5
or higher
• 100BASE-TX Shielded
twisted pair cable (STP) or
unshielded twisted pair
cable (UTP) of category 3
or higher
100m - (Built into GOT)
When PLC:GOT is N:1
TCP: 16 PLCs or less for
1 GOT
When PLC:GOT is 1:N
TCP: 32 GOTs or less
(recommended to 16 or
less) for 1 PLC
CompactLogix - Ethernet 100m - (Built into GOT)
When PLC:GOT is N:1
TCP: 16 PLCs or less for
1 GOT
When PLC:GOT is 1:N
TCP: 20 GOTs or less
(recommended to 16 or
less) for 1 PLC
FlexLogix 1788-ENBT/A Ethernet 100m - (Built into GOT)
When PLC:GOT is N:1
TCP: 16 PLCs or less for
1 GOT
When PLC:GOT is 1:N
TCP: 20 GOTs or less
(recommended to 16 or
less) for 1 PLC
EtherNet/IP
communication
module
ControlLogix,
CompactLogix
FlexLogix
GOT
Connection cable
EtherNet/IP(AB Tag), Gateway
Communication driver