Allen-Bradley 1769-SDN CompactLogix DeviceNet Scanner Module
The Allen-Bradley 1769-SDN, also cataloged as the 1769-SDN Communication Module, operates as a dedicated hardware component for DeviceNet network master/slave traffic management within CompactLogix platforms. Configured to interface up to 64 nodes over a 500 Kbps trunkline, it handles deterministic I/O data exchanges and explicit messaging tasks. The module bridges field-level sensors, actuators, and motor starters directly to the controller image table via the 1769 backplane bus.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-SDN |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.56 lbs (0.26 kg) |
| Dimensions | Single-Slot Width (Compact I/O Form Factor) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | Power Dissipation: 4.7 W |
| Network Protocol | DeviceNet |
| Maximum Communication Rate | 500 Kbps |
| Maximum Node Count | 64 Nodes |
| Messaging Types | Explicit Messaging, Master and Slave Operations |
| Power Supply Distance Rating | 4 Modules |
| Enclosure Type | Open Style |
| Mounting Options | DIN Rail or Panel Mount |
EtherNet/IP & DeviceNet Deterministic Network Integration
The 1769-SDN executes high-speed scan cycles to translate physical CAN-based DeviceNet frames into CompactLogix backplane memory arrays. Operating within deterministic Ethernet/IP and CIP network topologies, the module synchronizes scheduled I/O slave data blocks while reserving bandwidth for asynchronous explicit messaging. Firmware flash compatibility ensures seamless backplane communication velocity across legacy CompactLogix processors and MicroLogix 1500 systems without packet collision.
Frequently Asked Questions
Q: What is the maximum power supply distance rating for the 1769-SDN module on a 1769 backplane?
A: The 1769-SDN has a power supply distance rating of 4. It must be installed within 4 module slots of a 1769 power supply to maintain adequate backplane voltage regulation.
Q: Does the 1769-SDN require external power from the DeviceNet network trunkline?
A: Yes, while logic power is drawn from the 1769 backplane, the DeviceNet transceiver circuitry requires 24 VDC external power directly from the DeviceNet thick/thin trunk cable.
Q: How many node addresses can be configured on a single 1769-SDN scanner?
A: The module supports up to 64 DeviceNet node addresses (0 to 63), functioning simultaneously in master or slave modes to scan connected field devices.
Field Installation Guidelines
- Power Isolation: Fully isolate 1769 system backplane power and external 24 VDC DeviceNet bus power before mounting or removing the module.
- Slot Position & Distance: Verify the module is mounted within 4 slots of the system power supply to comply with backplane voltage drop specifications.
- DIN Rail / Panel Mounting: Secure the module onto 35 mm DIN rail or panel-mount using M4/M5 screws, ensuring the panel plate is properly grounded.
- DeviceNet Tap Connections: Connect the 5-pin unpluggable linear connector to the DeviceNet drop line. Ensure signal conductors (CAN_H, CAN_L) and power leads (V+, V-) are wired correctly.
- Trunkline Termination: Verify that 121-ohm, 1/4-watt metal film termination resistors are installed across CAN_H and CAN_L at both physical ends of the main DeviceNet trunk cable.
Allen-Bradley 1769-SDN CompactLogix DeviceNet Scanner Module
Allen-Bradley 1769-SDN CompactLogix DeviceNet Scanner Module
The Allen-Bradley 1769-SDN, also cataloged as the 1769-SDN Communication Module, operates as a dedicated hardware component for DeviceNet network master/slave traffic management within CompactLogix platforms. Configured to interface up to 64 nodes over a 500 Kbps trunkline, it handles deterministic I/O data exchanges and explicit messaging tasks. The module bridges field-level sensors, actuators, and motor starters directly to the controller image table via the 1769 backplane bus.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-SDN |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.56 lbs (0.26 kg) |
| Dimensions | Single-Slot Width (Compact I/O Form Factor) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | Power Dissipation: 4.7 W |
| Network Protocol | DeviceNet |
| Maximum Communication Rate | 500 Kbps |
| Maximum Node Count | 64 Nodes |
| Messaging Types | Explicit Messaging, Master and Slave Operations |
| Power Supply Distance Rating | 4 Modules |
| Enclosure Type | Open Style |
| Mounting Options | DIN Rail or Panel Mount |
EtherNet/IP & DeviceNet Deterministic Network Integration
The 1769-SDN executes high-speed scan cycles to translate physical CAN-based DeviceNet frames into CompactLogix backplane memory arrays. Operating within deterministic Ethernet/IP and CIP network topologies, the module synchronizes scheduled I/O slave data blocks while reserving bandwidth for asynchronous explicit messaging. Firmware flash compatibility ensures seamless backplane communication velocity across legacy CompactLogix processors and MicroLogix 1500 systems without packet collision.
Frequently Asked Questions
Q: What is the maximum power supply distance rating for the 1769-SDN module on a 1769 backplane?
A: The 1769-SDN has a power supply distance rating of 4. It must be installed within 4 module slots of a 1769 power supply to maintain adequate backplane voltage regulation.
Q: Does the 1769-SDN require external power from the DeviceNet network trunkline?
A: Yes, while logic power is drawn from the 1769 backplane, the DeviceNet transceiver circuitry requires 24 VDC external power directly from the DeviceNet thick/thin trunk cable.
Q: How many node addresses can be configured on a single 1769-SDN scanner?
A: The module supports up to 64 DeviceNet node addresses (0 to 63), functioning simultaneously in master or slave modes to scan connected field devices.
Field Installation Guidelines
- Power Isolation: Fully isolate 1769 system backplane power and external 24 VDC DeviceNet bus power before mounting or removing the module.
- Slot Position & Distance: Verify the module is mounted within 4 slots of the system power supply to comply with backplane voltage drop specifications.
- DIN Rail / Panel Mounting: Secure the module onto 35 mm DIN rail or panel-mount using M4/M5 screws, ensuring the panel plate is properly grounded.
- DeviceNet Tap Connections: Connect the 5-pin unpluggable linear connector to the DeviceNet drop line. Ensure signal conductors (CAN_H, CAN_L) and power leads (V+, V-) are wired correctly.
- Trunkline Termination: Verify that 121-ohm, 1/4-watt metal film termination resistors are installed across CAN_H and CAN_L at both physical ends of the main DeviceNet trunk cable.
