Allen-Bradley 1747-SDN DeviceNet Scanner Module
The Allen-Bradley 1747-SDN serves as the primary 1747-SDN DeviceNet Scanner Module utilized to execute deterministic fieldbus communication and remote I/O data acquisition across SLC 500 platforms. It interfaces the SLC 500 backplane bus directly with DeviceNet trunks, managing slave node data mapping and passing discrete/block transfer words between field actuators, drives, and the local processor.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1747-SDN |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.40 lbs (0.18 kg) |
| Dimensions | Single-slot SLC 500 rack form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | 5-24 VDC external loop / 90-500 mA backplane current |
| Communication Protocol | DeviceNet |
| Data Transfer Speed | 125 kbps, 250 kbps, 500 kbps configurable |
| Interface Ports | DeviceNet 5-pin trunk connector, RS-232 configuration port |
| Product Family | SLC 500 |
| Mounting Style | SLC 500 Chassis / DIN Rail / Panel Mount |
Backplane Bus Velocity & Deterministic Network Execution
The 1747-SDN scanner module links SLC 500 local memory structures directly to remote slave devices via the DeviceNet protocol, enabling deterministic network execution across CAN-based fieldbus topology. Featuring dedicated backplane bus communication velocity routines, the module processes I/O scan tables independently from the main processor scan cycle. Firmware-driven M0/M1 file buffer transfer mechanisms allow high-density I/O configurations, parameter configuration blocks, and diagnostic status flags to pass asynchronously without degrading backplane scan throughput.
Frequently Asked Questions
Q: Does the 1747-SDN module require external 24 VDC power to operate on the DeviceNet network?
A: Yes, while the module draws logic power from the SLC 500 chassis backplane bus, the DeviceNet network transceiver requires an explicit 24 VDC Class 2 power supply connected across the 5-pin DeviceNet connector.
Q: How is the node address (MAC ID) and baud rate configured on the 1747-SDN?
A: The DeviceNet node address (0 to 63) and data transfer speed (125 kbps, 250 kbps, or 500 kbps) can be set using RSNetWorx for DeviceNet software via the serial port or over the backplane bus.
Field Installation Guidelines
- Rack Slot Insertion: Insert the module into any available I/O slot in an SLC 500 chassis (except slot 0, which is reserved for the CPU). Align the board edges with the chassis guide rails and press firmly until the top and bottom retaining clips engage.
- Trunk Line Termination: Connect the DeviceNet trunk cable to the 5-pin open-style connector using standard wire color codes (V+, CAN H, Shield, CAN L, V-). Install 121 ohm, 1/4-watt end-of-line terminating resistors across the CAN H and CAN L lines at both physical ends of the trunk.
- Cable Routing & Noise Suppression: Maintain separation between DeviceNet communication cables and high-voltage AC motor leads. Ensure cable shields are grounded at a single physical point near the system power supply to maintain signal integrity across deterministic networks.
Allen-Bradley 1747-SDN DeviceNet Scanner Module
Allen-Bradley 1747-SDN DeviceNet Scanner Module
The Allen-Bradley 1747-SDN serves as the primary 1747-SDN DeviceNet Scanner Module utilized to execute deterministic fieldbus communication and remote I/O data acquisition across SLC 500 platforms. It interfaces the SLC 500 backplane bus directly with DeviceNet trunks, managing slave node data mapping and passing discrete/block transfer words between field actuators, drives, and the local processor.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1747-SDN |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.40 lbs (0.18 kg) |
| Dimensions | Single-slot SLC 500 rack form factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | 5-24 VDC external loop / 90-500 mA backplane current |
| Communication Protocol | DeviceNet |
| Data Transfer Speed | 125 kbps, 250 kbps, 500 kbps configurable |
| Interface Ports | DeviceNet 5-pin trunk connector, RS-232 configuration port |
| Product Family | SLC 500 |
| Mounting Style | SLC 500 Chassis / DIN Rail / Panel Mount |
Backplane Bus Velocity & Deterministic Network Execution
The 1747-SDN scanner module links SLC 500 local memory structures directly to remote slave devices via the DeviceNet protocol, enabling deterministic network execution across CAN-based fieldbus topology. Featuring dedicated backplane bus communication velocity routines, the module processes I/O scan tables independently from the main processor scan cycle. Firmware-driven M0/M1 file buffer transfer mechanisms allow high-density I/O configurations, parameter configuration blocks, and diagnostic status flags to pass asynchronously without degrading backplane scan throughput.
Frequently Asked Questions
Q: Does the 1747-SDN module require external 24 VDC power to operate on the DeviceNet network?
A: Yes, while the module draws logic power from the SLC 500 chassis backplane bus, the DeviceNet network transceiver requires an explicit 24 VDC Class 2 power supply connected across the 5-pin DeviceNet connector.
Q: How is the node address (MAC ID) and baud rate configured on the 1747-SDN?
A: The DeviceNet node address (0 to 63) and data transfer speed (125 kbps, 250 kbps, or 500 kbps) can be set using RSNetWorx for DeviceNet software via the serial port or over the backplane bus.
Field Installation Guidelines
- Rack Slot Insertion: Insert the module into any available I/O slot in an SLC 500 chassis (except slot 0, which is reserved for the CPU). Align the board edges with the chassis guide rails and press firmly until the top and bottom retaining clips engage.
- Trunk Line Termination: Connect the DeviceNet trunk cable to the 5-pin open-style connector using standard wire color codes (V+, CAN H, Shield, CAN L, V-). Install 121 ohm, 1/4-watt end-of-line terminating resistors across the CAN H and CAN L lines at both physical ends of the trunk.
- Cable Routing & Noise Suppression: Maintain separation between DeviceNet communication cables and high-voltage AC motor leads. Ensure cable shields are grounded at a single physical point near the system power supply to maintain signal integrity across deterministic networks.
