Overview
Manuals
Architectural Capabilities
Hardware Generation Alert (Series C vs. Series D)
Features:
- Communication module is engineered for DeviceNet networks as part of the ControlLogix series
- Facilitates communication across various distances with multiple rates
- Supports up to 64 nodes, enhancing system scalability
This product supports efficient communication over various distances, achieving a data rate of 125 Kbps within a 500-meter range, boosting to 250 Kbps within a 250-meter range, and reaching 500 Kbps within a 100-meter range. This flexible communication speed meets the needs of different system layouts and applications.
The module requires 400 mA of current when powered by 5.1V DC, but consumes no current when powered by 24V DC. Notably, when operating according to the DeviceNet specification, the module consumes 60 mA of current to maintain normal operation under 24V DC.
The 1756-DNB Allen Bradley ControlLogix Communication Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen Bradley 1756-DNB ControlLogix Communication Module Manuals(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Node Expansion: Natively supports connecting and mapping up to 64 independent nodes (numbered 00 to 63) via a single linear loop. Node 63 is the factory default placeholder.
Communication Options: Exchange real-time metrics with slave hardware units using strobe, poll, cycle, or state change (COS) message operations.
Backplane Power Specifications: Draws a stable 5.1V DC 400mA power directly from the local chassis power rail.
Network Power Specifications: Draws an additional 24V DC 60mA power from a separate external DeviceNet communication line to maintain its transceiver circuitry.
If you are updating firmware or replacing parts, please note a major component change introduced by Rockwell Automation:
C Series Modules: Use the standard firmware baseline.
D Series Modules: Employ an upgraded internal ASIC processing chip. Due to the hardware architecture change, D Series modules require firmware versions V11.001 to V11.xxx to function correctly. They cannot be rolled back to earlier single-digit firmware versions.
