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1771-DW | Allen-Bradley Wire Fault Digital DC Input Module For PLC-5 Systems
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- $1,102.00
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- $1,102.00
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Product Description P/N: 1771-DW
Description
The Allen-Bradley 1771-DW is a wire fault digital input module designed for PLC-5 systems that require monitored DC input channels. It operates from 15–27VDC and supports detection of open and short circuit wiring faults across connected devices. The module converts up to seven DC input signals into logic levels compatible with the 1771 I/O architecture.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Allen-Bradley |
| Category | I/O Modules |
| Part Number | 1771-DW |
| Subcategory | Digital Input Modules |
| Manufacturer | Rockwell Automation |
| Module Type | Digital DC Input Module |
| Number of Inputs | 7 |
| Voltage Category | 10–60VDC, Sink (Source Load) |
| DC Operating Voltage | 15–27VDC |
| Backplane Current | 300 mA |
| Max DC Off-State Current | 1.0 mA |
| Signal Delay (On/Off) | 33 ±6 ms contact status; 3 ±2 ms wire-fault status |
| Pulse Capture Time | 50–9.999 microseconds |
| Wiring Arm | 1771-WA |
| Isolation | 1500VDC opto-electrical |
| Dimensions | 3.5 × 6.5 × 2.0 in (89 × 165 × 51 mm) |
| Operating Temperature | 0–60°C |
| Storage Temperature | -40–85°C |
| Humidity | 5–95% non-condensing |
| Keying Positions | Between pins 2–4 and 20–22 |
| Recommended Wiring | 14-gauge stranded, 3/64 in insulation |
Information About 1771-DW
The 1771-DW is a digital wire fault input module within the Allen-Bradley 1771 family, engineered to detect both contact status and wiring issues across seven monitored DC inputs. Its construction includes front-mounted status indicators for each channel along with a manual reset pushbutton for clearing detected wire faults. The module integrates easily with PLC-5 controllers and uses a 24VDC supply with shunt resistors to support accurate wire-fault detection. Typical applications include safety interlocks, monitored switches, and DC devices requiring confirmation of both signal state and wiring integrity.
Key Features:
- Seven monitored inputs: Converts on/off DC signals into PLC-compatible logic levels.
- Wire-fault detection: Identifies short circuits and open circuits across input wiring.
- Front-panel indicators: Provides individual status LEDs for each input channel.
- Manual reset switch: Allows restoration of normal operation after correcting wiring faults.
- Wide DC voltage support: Operates from 15–27VDC with recommended 24VDC supply.
- Fast signal response: Typical 33 ms contact status delay and 3 ms wire-fault detection delay.
- High isolation: Provides 1500VDC opto-electrical isolation for signal protection.
- Compatible hardware: Uses the 1771-WA wiring arm and installs in 1771 chassis systems.
The 1771-DW delivers the reliability and precision required for monitored DC input systems and fault-tolerant automation applications.
Description
The Allen-Bradley 1771-DW is a wire fault digital input module designed for PLC-5 systems that require monitored DC input channels. It operates from 15–27VDC and supports detection of open and short circuit wiring faults across connected devices. The module converts up to seven DC input signals into logic levels compatible with the 1771 I/O architecture.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Allen-Bradley |
| Category | I/O Modules |
| Part Number | 1771-DW |
| Subcategory | Digital Input Modules |
| Manufacturer | Rockwell Automation |
| Module Type | Digital DC Input Module |
| Number of Inputs | 7 |
| Voltage Category | 10–60VDC, Sink (Source Load) |
| DC Operating Voltage | 15–27VDC |
| Backplane Current | 300 mA |
| Max DC Off-State Current | 1.0 mA |
| Signal Delay (On/Off) | 33 ±6 ms contact status; 3 ±2 ms wire-fault status |
| Pulse Capture Time | 50–9.999 microseconds |
| Wiring Arm | 1771-WA |
| Isolation | 1500VDC opto-electrical |
| Dimensions | 3.5 × 6.5 × 2.0 in (89 × 165 × 51 mm) |
| Operating Temperature | 0–60°C |
| Storage Temperature | -40–85°C |
| Humidity | 5–95% non-condensing |
| Keying Positions | Between pins 2–4 and 20–22 |
| Recommended Wiring | 14-gauge stranded, 3/64 in insulation |
Information About 1771-DW
The 1771-DW is a digital wire fault input module within the Allen-Bradley 1771 family, engineered to detect both contact status and wiring issues across seven monitored DC inputs. Its construction includes front-mounted status indicators for each channel along with a manual reset pushbutton for clearing detected wire faults. The module integrates easily with PLC-5 controllers and uses a 24VDC supply with shunt resistors to support accurate wire-fault detection. Typical applications include safety interlocks, monitored switches, and DC devices requiring confirmation of both signal state and wiring integrity.
Key Features:
- Seven monitored inputs: Converts on/off DC signals into PLC-compatible logic levels.
- Wire-fault detection: Identifies short circuits and open circuits across input wiring.
- Front-panel indicators: Provides individual status LEDs for each input channel.
- Manual reset switch: Allows restoration of normal operation after correcting wiring faults.
- Wide DC voltage support: Operates from 15–27VDC with recommended 24VDC supply.
- Fast signal response: Typical 33 ms contact status delay and 3 ms wire-fault detection delay.
- High isolation: Provides 1500VDC opto-electrical isolation for signal protection.
- Compatible hardware: Uses the 1771-WA wiring arm and installs in 1771 chassis systems.
The 1771-DW delivers the reliability and precision required for monitored DC input systems and fault-tolerant automation applications.