Application Scenarios:
Picture a high-volume automotive stamping plant where a PLC-5/40 processor coordinates the destin of press clamping, part-ejection, die-lubrication and conveyor diverters across four independent machine zones, each protected by its own fused 24 V DC feed. On legacy panels this typically demanded two separate 16-point output cards, two terminal blocks, and careful cross-referencing of wire numbers when a tripped fuse knocked out half a zone — exactly the operational friction that the four-group architecture of the 1771-OBN was engineered to eliminate, since each group of eight carries its own DC return terminal and can be fed from a dedicated fused branch without card duplication. The same profile addresses three chronic pain points for plants maintaining dense PLC-5 installations: panel-space pressure (32 points in one slot means a populated 16-slot 1771-A4B chassis can host 512 discrete outputs, versus 256 with standard 16-point cards), wiring and spares-cycle friction (one catalog number covers what previously required two cards and two wiring arms), and brownfield upgrade friction (drop-in replacement for failed output cards without disturbing chassis layout, power-supply sizing or program addressing). In packaging lines, water-treatment dosing skids, pulp-and-paper dryer sections and cement kiln auxiliary controls, the 1771-OBN remains the go-to high-density output card wherever the 1771 platform continues to deliver value.
Parameter:
| Main Parameters | Value / Description |
|---|---|
| Product Model | 1771-OBN |
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Product Category | 32-point DC digital output module, 1771 PLC-5 family |
| Output Type / Count | Solid-state sourcing (high-side) transistor, 32 points in 4 isolated groups of 8 |
| Operating Voltage Range | 10–30 V DC at the output terminals |
| Voltage Category | 10–60 V DC (maximum transient withstand) |
| Continuous Current Per Point | 0.5 A maximum |
| Continuous Current Limits | 2 A per group of 8; 8 A per module |
| On-State Voltage Drop | ≤2 V DC at rated current |
| Off-State Leakage Current | ≤1 mA per output |
| Backplane Current Draw | 330 mA @ 5 V DC from 1771 chassis |
| Isolation Rating | 1500 V AC rms (optical isolation, logic to field) |
| Module Width | One single-slot position in any 1771 universal I/O chassis |
| Field Wiring | 1771-WD wiring arm (32-terminal) |
| Series / Coating | Series B with conformal-coated PCB for corrosive or humid environments |
| Mounting | Rack mountable in 1771-A1B through 1771-A4B chassis |
| Addressing | 2-slot, 1-slot or 1/2-slot addressing modes via PLC-5 configuration |
