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- Manufacturer
- Allen-Bradley
- Manufacturer part number
- 1756-DNB
- Product family
- ControlLogix Communication Modules (1756)
- Technical datasheet
- Data sheet
Specifications
| Attribute | Value |
|---|---|
| Type | DeviceNet scanner module |
| Manufacturer lifecycle | Active |
| Number Of Channels | 1 |
| Communication rate | 125 Kbps (500 m max), 250 Kbps (250 m max), 500 Kbps (100 m max) |
| Conducted RF immunity | 10Vrms with 1 kHz sine-wave 80% AM from 150 kHz...80 MHz |
| Current draw | 400mA @ 5.1V DC, 0mA @ 24V DC |
| DeviceNet connector torque | 0.56 nm |
| DeviceNet current draw | 60mA @ 24V DC |
| DeviceNet port | 1 DeviceNet open-style 5- or 10-pin linear plug |
| DeviceNet power | To comply with the CE low voltage directive (LVD), the DeviceNet network must be powered from a source compliant with the safety extra low voltage (SELV) or protected extra low voltage (PELV). To comply with UL restrictions, the DeviceNet network must be |
| DeviceNet voltage range | 11...25V DC CL 2/SELV |
| EFT/B immunity | ±3kV @ 5kHz on DeviceNet ports |
| Emissions | CISPR 11: Class A |
| Enclosure type rating | None (open-style) |
| ESD immunity | 6 kV contact discharges, 8 kV air discharges |
Show all 33 specificationsShow fewer specifications
| Isolation voltage | 50V (continuous), basic insulation type, DeviceNet network to backplane, Type tested at 853V AC @ 60s, No isolation between USB and backplane, |
|---|---|
| Module location | Chassis based, any slot |
| Number of nodes, max | 64 nodes |
| Operating temperature | 0 to 60 °C |
| Power dissipation | 3.5 W |
| Radiated RF immunity | 10 V/m with 1 kHz sine-wave 80% AM from 80...2000 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz, 3 V/m with 1 kHz sine-wave 80% AM from 2000...2700 MHz |
| Relative humidity | 5...95% noncondensing |
| Shock | Operating: 30 G, Non operating: 50 G |
| Slot width | 1 |
| Storage temperature | -40 °C |
| Suitable for safety functions | Yes |
| Supporting protocol for DeviceNet | Yes |
| Supporting protocol for DeviceNet Safety | Yes |
| Surge transient immunity | ±2 kV line-earth (CM) on ControlNet ports |
| Surrounding air temperature, max | 60 °C |
| Thermal dissipation | 11.9 btu/h |
| Vibration | 2 G @ 10...500 Hz |
| Wiring category | 1 - On DeviceNet ports, 3 - On USB ports |
Description
The Allen-Bradley 1756-DNB is listed by Rockwell Automation as the ControlLogix DeviceNet Comms Module, described as a DeviceNet Bridge/Scanner Module. Rockwell's product data gives one channel, a maximum of 64 nodes, and communication rates of 125 Kbps (500 m max), 250 Kbps (250 m max) and 500 Kbps (100 m max). Rockwell lists a current draw of 400mA at 5.1V DC, a DeviceNet current draw of 60mA at 24V DC, and power dissipation of 3.5 W. Rockwell shows the lifecycle status as Active.
Application: Communication module
Used with: ControlLogix 1756 chassis
What is the 1756-DNB used for?
The module is fitted in a ControlLogix chassis, in any slot, and acts as a bridge or scanner between the controller and a DeviceNet network. Rockwell lists support for the DeviceNet and DeviceNet Safety protocols. The enclosure type rating is given as None (open-style).
Key features
- One DeviceNet port, open-style 5 or 10-pin linear plug
- Supports up to 64 nodes on the network
- Chassis based, fits any slot, one slot wide
- Operating temperature range of 0 to 60 °C
- Supports DeviceNet and DeviceNet Safety protocols
Documents and Resources
Associated Products
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|---|---|---|---|---|---|
 | 1756-CN2Allen-Bradley | ControlLogix ControlNet interface module, BNC | In stock | View | |
 | 1756-CN2RAllen-Bradley | ControlLogix ControlNet redundant interface module | In stock | View | |
 | 1756-CN2RXTAllen-Bradley | ControlLogix ControlNet redundant interface module, XT | In stock | View | |
 | 1756-CNBAllen-Bradley | ControlLogix ControlNet communication module, 1 BNC | In stock | View | |
 | 1756-CNBRAllen-Bradley | ControlLogix ControlNet communication module, redundant | In stock | View | |
 | 1756-EN2FAllen-Bradley | ControlLogix EtherNet/IP module, 100 Mbps multimode fiber | In stock | View | |
 | 1756-EN2TAllen-Bradley | ControlLogix EtherNet/IP communication module, 10/100 Mbps | In stock | View | |
 | 1756-EN2TRAllen-Bradley | ControlLogix EtherNet/IP module, dual port 10/100 Mbps | In stock | View | |
 | 1756-EN2TXTAllen-Bradley | ControlLogix EtherNet/IP module, extended temperature | In stock | View | |
 | 1756-EN3TRAllen-Bradley | ControlLogix EtherNet/IP module, dual port copper | In stock | View | |
 | 1756-ENBTAllen-Bradley | ControlLogix EtherNet/IP communication module, 10/100 Mbps | In stock | View | |
 | 1756-DHRIOAllen-Bradley | ControlLogix DH Plus/RIO Comms Module | In stock | View |
Product Questions
Is the 1756-DNB discontinued?
No. Its manufacturer lifecycle status is Active.
Can another Allen-Bradley ControlLogix Communication Modules part replace it?
Potential replacements must be checked against the required ratings, dimensions and connections. Sharing a family name does not establish interchangeability.
Do you ship worldwide?
Yes. TimControls ships worldwide. Parts usually ship within 3 to 7 working days of order confirmation, and the exact lead time and shipping options are stated on your quote. Include your delivery country and postal code when you ask for a quote.
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