User manual
Publication 1768-UM001C-EN-P - November 2007
30 Communicate over Networks
DeviceNet Network
Communication
The DeviceNet network uses the Common Industrial Protocol (CIP) to
provide the control, configuration, and data collection capabilities for
industrial devices. The DeviceNet network uses the proven Controller Area
Network (CAN) technology, which lowers installation costs and decreases
installation time and costly downtime.
A DeviceNet network provides access to the intelligence present in your
devices by letting you connect devices directly to plant-floor controllers
without having to hard wire each device into an I/O module.
Communication I/O Modules for DeviceNet
The following table lists the communication I/O modules available for use
with the DeviceNet network.
DeviceNet Interfaces
Application Required
Interface
• Communicates with other DeviceNet devices
• Uses the controller as a master on a DeviceNet network
1769-SDN
DeviceNet
scanner
• Accesses remote Compact I/O modules over a DeviceNet network
• Sends remote I/O data for as many as 30 modules back to a
scanner or controller
1769-ADN
DeviceNet
adapter
(1)
(1)
This table specifically describes using the 1769-ADN adapter to access remote Compact I/O modules over the
DeviceNet network. However, CompactLogix controllers can access other Allen-Bradley remote I/O modules
over the DeviceNet network. In those cases, you must select the appropriate interface. For example, if
accessing remote POINT I/O modules, you must select the 1734-ADN adapter.
Catalog Number Adapter Specifications
Distributed Block I/O
1791D CompactBlock I/O 1791D CompactBlock I/O contains a
built-in adapter in the base block
• removable terminal block
• 50% smaller than FLEX I/O
• 24V DC and selectable combination analog block
• 4...16 points
• DeviceLogix-enabled
• expandable up to 32 digital points
1790 CompactBlock LDX I/O CompactBlock LDX I/O contains a
built-in adapter in the base block
• lowest price-per-point I/O
• digital: 24V DC, 120V AC,
• analog: current, voltage, RTD and thermocouple
• 4...16 points
• expandable up to 64 points