10 Rockwell Automation Publication 1756-UM004A-EN-P - March 2019
Chapter 1 ControlLogix EtherNet/IP Network Device Overview
EtherNet/IP Network Specifications
Table 2 - EtherNet/IP Network Specifications
Cat. No. Connections CIP Unconnected
Messages
(backplane +
Ethernet)
Ethernet Node
Count, Max
Packet Rate Capacity (packets/second)
(3)
SNMP Support
(password
required)
TCP CIP I/O HMI and MSG
1756-ENBT 64 128
(1)
64 + 64 — 5000 900 Yes
1756-EN2F 128 256
(1)
128 + 128 — IMPORTANT: Packet rates for
ControlLogix EtherNet/IP
communication modules
depend on series and firmware
revision.
2000 Yes
1756-EN2T 128 256
(1)
128 + 128 — 2000 Yes
1756-EN2TXT 128 256
(1)
128 + 128 — 2000 Yes
1756-EN2TR 128 256
(1)
128 + 128 — 2000 Yes
1756-EN2TRXT 128 256
(1)
128 + 128 — 2000 Yes
1756-EN2TSC 128 256
(1)
128 + 128 — • 1800 without
encryption
• 930 with
encryption
Yes
1756-EN3TR 128 256
(1)
128 + 128 — 2000 Yes
1756-EN4TR 512 1000 I/O
528
(2)
256+256 — • 50,000 without CIP Security
• 25,000 with integrity
• 15,000 with integrity and
confidentiality
• 3,700 without CIP
Security
•2,700 with
integrity
•1,700 with
integrity and
confidentiality
Yes
1756-EN4TRXT 512 1000 I/O
528
(2)
256+256 — • 50,000 without CIP Security
• 25,000 with integrity
• 15,000 with integrity and
confidentiality
• 3,700 without CIP
Security
•2,700 with
integrity
•1,700 with
integrity and
confidentiality
Yes
1756-EWEB 64 128
(1)
128 + 128 — — 900 Yes
(1) CIP connections can be used for all explicit or all implicit applications. For example, a 1756-ENBT module has a total of 128 CIP connections that can be used for any combination of connections.
(2) There are 1000 CIP I/O connections and 528 CIP messaging connections.
(3) Total packet rate capacity = I/O Produced Tag, max + HMI/MSG, max. Packet rates vary depending on packet size. For more detailed specifications, see the EDS file for a specific catalog number.
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