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- ABB
- DO821
- Digital Output Module
- Switzerland
- 45 x 102 x 119mm
- 0.23kg
- 3BSE013250R1
- Xiamen, China
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ABB DO821 3BSE013250R1 Digital Output Module
Product Overview
The ABB DO821 3BSE013250R1 is an advanced digital output module designed for use with the ABB AC 800M control system as part of the S800 I/O series. It features 8 channels of digital output, configured as relay-type outputs, making it suitable for switching AC or DC loads. The DO821 is equipped with high isolation, reliable switching performance, and clear output status indication, making it a strong choice for various industrial automation applications.
This module is especially useful in systems that require electromechanical switching capabilities, and its plug-in design ensures easy installation and replacement. The DO821 enables safe and flexible operation while maintaining compactness and industrial-grade reliability.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | DO821 |
| Order Code | 3BSE013250R1 |
| Module Type | Digital Output Module (Relay) |
| Number of Channels | 8 |
| Output Type | Relay contacts (Form A SPST-NO) |
| Output Voltage | 24–230 V AC / 24–48 V DC |
| Max Load Current per Channel | 2 A @ 230 V AC / 2 A @ 48 V DC |
| Switching Power (AC) | Max 460 VA |
| Switching Power (DC) | Max 90 W |
| Isolation | Channel-to-bus and channel-to-channel isolation |
| Output Status Indicators | Yes (LEDs for each channel) |
| Dimensions | 45 x 102 x 119 mm |
| Weight | 0.23 kg |
| Mounting | DIN Rail |
| Operating Temperature | –25°C to +70°C |
| Hot Swappable | Yes |
| Series | S800 I/O |
| Certifications | CE, UL, RoHS |
Applications
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Motor & Solenoid Control: Ideal for switching higher power loads such as motors, solenoids, and contactors.
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Industrial Alarm Systems: Used in control panels for activating alarms and safety relays.
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Process Control Systems: Suitable for valve actuation and sequential machine control in process industries.
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HVAC and Utilities: Controls fans, pumps, and compressors in building management systems.
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Electrical Panel Automation: A perfect fit for I/O expansion in distributed control architectures.
Advantages
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Relay-Based Outputs: Enables direct switching of high-power AC/DC loads.
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High Isolation: Safe and reliable operation, even under mixed-load conditions.
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LED Indicators: Each channel features a status LED for easy diagnostics.
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Versatile Output Capability: Supports a wide voltage range for different industrial standards.
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Compact & Modular: Saves panel space and simplifies I/O expansion in the field.
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Hot Swappable Design: Enables replacement without interrupting system power or control logic.
Brand
ABB
Series
S800 I/O – AC 800M Control System
Recommended Models (Same Series or Related)
| Model | Channels | Output Type | Dimensions (mm) | Weight | Key Feature |
|---|---|---|---|---|---|
| DO820 | 8 | Transistor (24 VDC) | 45 x 102 x 119 | 0.23 kg | High-speed solid-state output |
| DO814 | 16 | Transistor (24 VDC) | 45 x 102 x 119 | 0.26 kg | High channel density output |
| DO815 | 8 | Relay Output | 45 x 102 x 119 | 0.24 kg | Relay output, similar to DO821 |
| DI820 | 8 | Digital Input (24 VDC) | 45 x 102 x 119 | 0.23 kg | Complements digital output modules |
| DO840 | 16 | Transistor (24 VDC) | 45 x 102 x 119 | 0.27 kg | Diagnostic and high-current output |
Recommended Models (Popular ABB Products)
| Model | Function | Dimensions (mm) | Weight | Application |
|---|---|---|---|---|
| AI820 | Analog Input (8 channels) | 45 x 102 x 119 | 0.23 kg | Sensor signal acquisition |
| AO810 | Analog Output (8 channels) | 45 x 102 x 119 | 0.24 kg | Signal control for actuators |
| DI821 | Digital Input (8 channels) | 45 x 102 x 119 | 0.22 kg | Fast response input for industrial systems |
| PM864AK01 | CPU Module | 142 x 186 x 186 | 1.1 kg | Core processing for AC800M systems |
| TU810V1 | Terminal Unit | 187 x 118 x 49 | 0.25 kg | Backplane connection for I/O modules |
FAQs
Q1: What is the output type of the DO821 module?
A: The DO821 uses electromechanical relay outputs (SPST-NO).
Q2: How many channels are available on the DO821?
A: The module features 8 independent relay output channels.
Q3: Can DO821 switch both AC and DC loads?
A: Yes, it supports 24–230 V AC and 24–48 V DC switching.
Q4: Is the module hot swappable?
A: Yes, it supports hot swapping for maintenance without power-down.
Q5: What’s the maximum switching current per channel?
A: Each channel can handle up to 2 A.
Q6: Is there electrical isolation between channels?
A: Yes, both channel-to-channel and channel-to-bus isolation are provided.
Q7: Does the module provide channel status indication?
A: Yes, it has individual LEDs for each output channel.
Q8: Is this module compatible with other S800 I/O modules?
A: Yes, it’s fully compatible with other S800 modules in AC800M systems.
Q9: What is the size and weight of the DO821 module?
A: The module measures 45 x 102 x 119 mm and weighs 0.23 kg.
Q10: What applications is the DO821 best suited for?
A: It is ideal for relay-based switching of motors, lamps, valves, and alarms.
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Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
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