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Description
Application Scenarios:
Consider an automotive body‑in‑white line where hundreds of pneumatically actuated grippers, weld timers, and safety interlocks communicate on DeviceNet — a fieldbus installed in the original 2005 build and still wired into every cell on the shop floor. The plant’s controls group has since migrated the plant backbone to ControlLogix 5580 processors with EtherNet/IP, but ripping out the entire DeviceNet field layer would shut the line down for weeks and cost millions in rewiring. The 1756‑DNB was engineered for exactly this pain point: it slides into a single slot of the existing 1756‑A17 chassis, connects to the trunk through its open‑style DeviceNet port, and immediately makes all 64 field devices appear as native Logix tags in the processor’s I/O tree — no ladder‑logic rework, no third‑party gateway translation layer, no loss of the fieldbus investment.rockwellautomation.com+1 The same value applies in material‑handling distribution centers driving Motor Control Centers over DeviceNet, in water/wastewater panels where legacy 1794‑Flex I/O blocks still live on the trunk, in beverage bottling plants filling at hundreds of containers per minute, and in any brownfield retrofit where the controls team must modernize the controller without abandoning a proven DeviceNet field layer.industrialmonitordirect.com+1
Parameter:
| Main Parameters | Value / Description |
|---|---|
| Product Model | 1756‑DNB (Series C and D) |
| Manufacturer | Allen‑Bradley (Rockwell Automation) |
| Product Category | ControlLogix DeviceNet Scanner / Bridge Module |
| DeviceNet Nodes Supported | Up to 64 nodes on a single trunk |
| Communication Rates (selectable) | 125 Kbps (500 m max), 250 Kbps (250 m max), 500 Kbps (100 m max) |
| Backplane Current Draw | 400 mA @ 5.1V DC; 0 mA @ 24V DC |
| DeviceNet Network Current Draw | 60 mA @ 24V DC |
| DeviceNet Network Voltage Range | 11–25V DC (Class 2 / SELV) |
| Power Dissipation | 3.5 W (11.9 BTU/hr) |
| Isolation Voltage | 50V continuous, basic insulation, DeviceNet network to backplane (type‑tested at 853V AC @ 60 s) |
| DeviceNet Port | 1 open‑style 5‑pin or 10‑pin linear plug (torque 0.56 Nm) |
| Configuration Port | USB 2.0 (direct laptop connection for configuration without a network) |
| Module Location | Any slot in a 1756 ControlLogix chassis (single‑slot width) |
| Module Dimensions (H × W × L) | 18.21 × 5.59 × 22.20 cm (7.17 × 2.20 × 8.74 in) |
| Weight | 0.365 kg (0.80 lb) |
| Operating / Storage Temperature | 0 to +60°C / –40 to +85°C |
| Relative Humidity | 5–95% non‑condensing |
| Shock / Vibration | 30G operating shock; 2G @ 10–500 Hz vibration |
| ESD / EFT / Surge Immunity | 6 kV contact / 8 kV air ESD; ±3 kV @ 5 kHz EFT on DeviceNet ports; ±2 kV surge |
| Conducted / Radiated RF Immunity | 10 Vrms conducted (150 kHz–80 MHz); 10 V/m radiated (80–2000 MHz) |
| Safety Protocol Support | DeviceNet Safety (suitable for safety functions) |
| Emissions / Temperature Code | CISPR 11 Class A; T4A (North America) / T4 (IEC) |
| Certifications | CE, UKCA, ATEX Zone 2 (Category 3), Class I Div 2 Groups A, B, C, D |
