Product details
Overview
The ABB DO840 Digital Output Module is a versatile solution designed for industrial automation, offering 16 current-sourcing digital output channels. It supports both single and redundant applications, ensuring high reliability and functionality. With advanced diagnostics, process voltage supervision, and robust protective measures, the DO840 is engineered to meet the demands of modern industrial systems.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | ABB |
| Model | DO840 |
| Channels | 16 (2 groups of 8) |
| Output Type | Transistor current-sourcing, current-limited |
| Voltage Range | 19.2–32 V DC |
| Max Channel Load Current | 0.5 A |
| Total Load Current (Module) | 4 A (@ <40°C), 2 A (@ <55°C) |
| Short Circuit Current | 2.5 A (maximum per channel) |
| Leakage Current | <10 µA |
| On-State Voltage Drop | <0.3 V |
| Loop Monitoring | Open circuit and short circuit detection (energized state) |
| Maximum Field Cable Length | 600 meters (656 yards) |
| Current Consumption | 130 mA (5 V Modulebus), 200 mA (24 V process power supply, no external load) |
| Power Dissipation | 4.3 W |
| OSP Timer Settings | 256, 512, 1024 ms |
| Isolation | Groupwise isolation from ground |
| Dielectric Test Voltage | 500 V AC |
| Rated Insulation Voltage | 50 V |
| Mounting | Compatible with termination units TU810, TU812, TU814, TU830, TU842, TU843, TU852 |
FAQ
Q: Can the DO840 be used in redundant configurations?
A: Yes, it supports both single and redundant application setups for enhanced reliability.
Q: What happens if an error is detected during operation?
A: The Output Set as Predetermined (OSP) feature ensures that outputs are set to a safe, predefined state in the event of an error.
Q: How does the module ensure protection for outputs?
A: Each output is equipped with current-limiting and over-temperature protection, along with EMC shielding and suppression for inductive loads.
Q: What is the maximum cable length supported by the module?
A: The maximum field cable length is 600 meters (656 yards), allowing for flexible installation.
For more detailed information, please check official datasheet: S800_I_O_Modules_and_Termination_Units
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