Catalogs > Automation Systems Catalog > Programmable Controllers > ControlLogix System > Communication Modules
Communication Modules
| Introduction |  |
Environmentals and Certifications | |
EtherNet/IP Network | |
ControlNet Network | |
DeviceNet Network | |
| Data Highway Plus and Remote I/O Networks | |
Foundation Fieldbus Network | |
Serial Communication | |
DH-485 Network | |
SynchLink Communication | |
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Data Highway Plus and Remote I/O Networks
The Data Highway Plus (DH+) network supports messaging between devices. The remote I/O link connects to remote I/O chassis and other intelligent devices.
The 1756-DHRIO module supports messaging between devices on DH+ networks. The Remote I/O functionality enables the module to act as a scanner for transferring digital and block-transfer data to and from remote I/O devices.
The 1756-RIO module can act as a scanner or adapter on a Remote I/O (RIO) network. In addition to digital and block-transfer data, the 1756-RIO module transfers analog and specialty data without message instructions.
Data Highway Plus and Remote I/O Communication Modules
Specifications [PDF]
| Cat. No. | Description | Communication Rate | DH+ Connections | RIO Connections | Logix Connections |
| 1756-DHRIO | Data Highway Plus/Remote I/O communication module | DH+: 57.6 Kbps RIO: 57.6 Kbps, 115.2 Kbps, 230.4 Kbps |
32 DH+ messages per DH+ channel | 32 logical rack connections per remote I/O channel 16 block-transfer connections per remote I/O channel |
32 |
| 1756-RIO | Remote I/O communication module | RIO: 57.6 Kbps, 115.2 Kbps, 230.4 Kbps | — | 32 physical racks (0...76), any combination of rack size and block transfers | 10 scheduled I/O |
| 1756-DHRIOXT | ControlLogix-XT, Data Highway Plus/Remote I/O communication module | DH+: 57.6 Kbps RIO: 57.6 Kbps, 115.2 Kbps, 230.4 Kbps |
32 DH+ messages per DH+ channel | 32 logical rack connections per remote I/O channel 16 block-transfer connections per remote I/O channel |
32 |
Example Configuration—Data Highway Plus Network
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Example Configuration—Remote I/O Network
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Accessories—DH+ and Remote I/O Networks
| Cat. No. | Description | Specifications |
| 1770-CD | Cable to connect communication module to DH+ network | Belden 9463 twinaxial |
| 9300-RADKIT | Remote access dial-in kit | 56 Kbps modem connection to devices on a DH+ network, includes: • pre-configured modem • communication module • DIN rail mounting hardware • associated cables |