1790D-8BV8B Technical Specifications and Overview
The 1790D-8BV8B from Allen-Bradley offers a versatile solution for digital signal processing over DeviceNet networks. Engineering teams rely on this module for its robust isolation and precise timing capabilities in demanding environments.
Core Control and Performance Data
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Model Number: 1790D-8BV8B
- Input Count: 8 points non-isolated with universal sinking or sourcing configurations.
- Output Count: 8 points non-isolated sourcing outputs for high-side switching.
- Nominal Voltage: 24V DC standard operating voltage for both input and output circuits.
- Isolation Rating: 1250V AC RMS photocoupler isolation between I/O channels and logic circuits.
- Signal Indicators: 16 independent green status LEDs provide real-time visual diagnostics for all points.
Electrical Input Characteristics
- Voltage Range: 9.6V DC minimum to 28.8V DC maximum for valid ON states.
- Input Current: 8 mA maximum per point when operating at peak 28.8V DC levels.
- OFF State Threshold: 5V DC maximum ensures reliable signal cutoff and prevents false triggering.
- Input Impedance: 4.8 KΩ nominal resistance maintains signal integrity across the sensing circuit.
- Common Type: 8 points shared across a non-polarity 8COM terminal for flexible wiring.
Output Switching Capabilities
- Current Capacity: 0.5 A maximum per output with a 4.0 A total common limit.
- Voltage Drop: 0.5V DC maximum drop across the module during active conduction states.
- Leakage Current: 0.5 mA maximum leakage ensures safety for high-impedance connected loads.
- Switching Delay: 0.5 ms maximum Off-to-On and 1.0 ms maximum On-to-Off response times.
- Minimum Load: 1 mA per channel required to maintain stable output switching states.
Environmental and Physical Standards
- Power Dissipation: 1.2 W maximum at 28.8V DC to minimize heat buildup in enclosures.
- Temperature Stability: Designed for standard industrial ranges with linear performance across the voltage spectrum.
- Wiring Interface: Integrated 37-pin D-shell connector facilitates rapid installation and secure cable retention.
- DeviceNet Power: Operates within an 11 to 28.8V DC range for the communication bus.
- Interference Resistance: Built-in photocoupler isolation protects the logic side from field-side electrical noise.
Installation and Shipping Details
- Mounting: Secure the 1790D-8BV8B to a standard DIN rail or panel using integrated brackets.
- Package Contents: One Allen-Bradley 1790D-8BV8B module and factory-sealed protective static packaging.
- Global Logistics: We ship units via FedEx, UPS, or DHL for fast international delivery.
- Technical Support: Contact Oiltech Controls at info@oiltechcontrols.com for wiring diagrams or configuration assistance.
- Direct Inquiry: Reach our team via WhatsApp at +86 158 8020 0923 for immediate pricing.
Frequently Asked Questions
- Can I mix sinking and sourcing sensors on the input side?
Yes, the universal input design allows both types if they share the same common. - Does this module require a separate power supply for the DeviceNet bus?
The module draws power from the DeviceNet network for logic while using field power for I/O. - How do I choose between the base and expansion models?
Select the base module for the primary network connection and add expansion units for higher density. - What is the primary advantage of the 37-pin D-shell connector?
It reduces wiring errors and speeds up replacement during critical maintenance windows in the field.
Author: Oiltech Controls
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