Allen-Bradley 1769-ADN CompactLogix DeviceNet Adapter Module
The Allen-Bradley 1769-ADN, also cataloged as the 1769-ADN DeviceNet Adapter Module, operates as a dedicated hardware component for fieldbus network integration within CompactLogix expansion platforms. The unit bridges high-speed serial DeviceNet communications to local Compact I/O modules across a maximum capacity of 30 modules per bank assembly. Configured to manage system I/O updates with a maximum heat dissipation profile of 4.7 W, the module executes deterministic real-time backplane data transfer while maintaining galvanic isolation verified at 710 VDC for 1 minute.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-ADN |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.30 kg (2.87 lbs) |
| Dimensions | 11.8 cm x 5.0 cm x 8.7 cm (Height w/ tabs: 13.8 cm) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 4.7 W Max Heat Dissipation |
| I/O Capacity | Up to 30 Compact I/O modules |
| Network Cable | Allen-Bradley part no. 1485C-P1-Cxxx |
| Power Supply Distance Rating | 4 modules (Series A); 5 modules (Series B) |
| Isolation Voltage | 710 VDC for 1 minute |
| Vibration / Shock | IEC 60068-2-6: 2g @ 10-500 Hz / IEC 60068-2-27: 15g Operating |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1769-ADN manages backplane bus communication velocity across local Compact I/O banks by translating incoming DeviceNet serial CAN frames into native parallel backplane protocol structures. Firmware flash compatibility ensures synchronized scan execution between remote trunkline scanners and connected input/output channels. The adapter scales high-density I/O configurations while strictly enforcing power supply distance ratings—allowing placement no further than 4 modules (Series A) or 5 modules (Series B) away from the 1769 power supply to maintain stable backplane signal integrity and avoid timing dropouts.
Frequently Asked Questions
Q: How is the maximum distance between the 1769-ADN adapter and the system power supply determined?
A: The distance is dictated by the Power Supply Distance Rating of the module series. Series A adapters must be located within 4 slots of the 1769 power supply, whereas Series B adapters allow installation up to 5 slots away to prevent excessive backplane logic voltage drops.
Q: What network trunkline cable is specified for connecting the 1769-ADN to a DeviceNet network?
A: Allen-Bradley recommends using 1485C-P1-Cxxx class thick or thin DeviceNet cable assemblies (as detailed in Allen-Bradley publication DN-2.5) to ensure proper network impedance and baud rate transmission performance.
Field Installation Guidelines
- Power Isolation: Ensure all primary power sources and DeviceNet trunkline power supplies are de-energized prior to mounting or removing the 1769-ADN module to avoid electrical arcs or network disruption.
- DIN Rail / Panel Mounting: Lock the adapter securely onto a 35 mm DIN rail or secure it via panel mounting tabs. Verify that side tongue-and-groove interconnects are fully engaged with adjacent 1769 I/O modules or power supplies before snapping down the locking latches.
- ESD & Grounding Safeguards: Adhere to IEC 61000-4-2 limits (6 kV contact, 8 kV air discharge) by using ESD wrist straps during installation. Fasten the ground terminal pin securely to the metal panel backplate to maintain compliance with CISPR 11 Class A emission standards.
- Network Wiring & Termination: Connect the 5-pin removable DeviceNet connector ensuring color-coded signal lead alignment (V+, CAN H, Shield, CAN L, V-). Install 121-ohm, 1/4-watt metal film terminating resistors across the CAN H and CAN L lines at both physical ends of the main DeviceNet trunkline.
Allen-Bradley 1769-ADN CompactLogix DeviceNet Adapter Module
Allen-Bradley 1769-ADN CompactLogix DeviceNet Adapter Module
The Allen-Bradley 1769-ADN, also cataloged as the 1769-ADN DeviceNet Adapter Module, operates as a dedicated hardware component for fieldbus network integration within CompactLogix expansion platforms. The unit bridges high-speed serial DeviceNet communications to local Compact I/O modules across a maximum capacity of 30 modules per bank assembly. Configured to manage system I/O updates with a maximum heat dissipation profile of 4.7 W, the module executes deterministic real-time backplane data transfer while maintaining galvanic isolation verified at 710 VDC for 1 minute.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-ADN |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.30 kg (2.87 lbs) |
| Dimensions | 11.8 cm x 5.0 cm x 8.7 cm (Height w/ tabs: 13.8 cm) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 4.7 W Max Heat Dissipation |
| I/O Capacity | Up to 30 Compact I/O modules |
| Network Cable | Allen-Bradley part no. 1485C-P1-Cxxx |
| Power Supply Distance Rating | 4 modules (Series A); 5 modules (Series B) |
| Isolation Voltage | 710 VDC for 1 minute |
| Vibration / Shock | IEC 60068-2-6: 2g @ 10-500 Hz / IEC 60068-2-27: 15g Operating |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1769-ADN manages backplane bus communication velocity across local Compact I/O banks by translating incoming DeviceNet serial CAN frames into native parallel backplane protocol structures. Firmware flash compatibility ensures synchronized scan execution between remote trunkline scanners and connected input/output channels. The adapter scales high-density I/O configurations while strictly enforcing power supply distance ratings—allowing placement no further than 4 modules (Series A) or 5 modules (Series B) away from the 1769 power supply to maintain stable backplane signal integrity and avoid timing dropouts.
Frequently Asked Questions
Q: How is the maximum distance between the 1769-ADN adapter and the system power supply determined?
A: The distance is dictated by the Power Supply Distance Rating of the module series. Series A adapters must be located within 4 slots of the 1769 power supply, whereas Series B adapters allow installation up to 5 slots away to prevent excessive backplane logic voltage drops.
Q: What network trunkline cable is specified for connecting the 1769-ADN to a DeviceNet network?
A: Allen-Bradley recommends using 1485C-P1-Cxxx class thick or thin DeviceNet cable assemblies (as detailed in Allen-Bradley publication DN-2.5) to ensure proper network impedance and baud rate transmission performance.
Field Installation Guidelines
- Power Isolation: Ensure all primary power sources and DeviceNet trunkline power supplies are de-energized prior to mounting or removing the 1769-ADN module to avoid electrical arcs or network disruption.
- DIN Rail / Panel Mounting: Lock the adapter securely onto a 35 mm DIN rail or secure it via panel mounting tabs. Verify that side tongue-and-groove interconnects are fully engaged with adjacent 1769 I/O modules or power supplies before snapping down the locking latches.
- ESD & Grounding Safeguards: Adhere to IEC 61000-4-2 limits (6 kV contact, 8 kV air discharge) by using ESD wrist straps during installation. Fasten the ground terminal pin securely to the metal panel backplate to maintain compliance with CISPR 11 Class A emission standards.
- Network Wiring & Termination: Connect the 5-pin removable DeviceNet connector ensuring color-coded signal lead alignment (V+, CAN H, Shield, CAN L, V-). Install 121-ohm, 1/4-watt metal film terminating resistors across the CAN H and CAN L lines at both physical ends of the main DeviceNet trunkline.
