There are still some products that have not been listed yet. For more information, please contact us. If the product model does not match the displayed picture, the actual model shall prevail. Please consult us for specific product images; We will arrange for the warehouse to take photos for confirmation. We have 76 shared warehouses worldwide, so it may take several hours to accurately respond to your message. We deeply apologize for any inconvenience caused to you. Of course, we will process your inquiry as soon as possible.

The ABB DO802 is a specialized 8-channel relay output module designed for the S800 I/O system, serving as a critical interface between automation controllers and high-power field devices. Unlike standard semiconductor outputs, the ABB DO802 utilizes electromechanical relays to switch higher voltage and current loads, making it indispensable for controlling motors, solenoid valves, alarms, and contactors in diverse industrial environments. As a robust component of distributed control systems (DCS), the ABB DO802 ensures reliable isolation and switching capabilities for safety-critical applications.

The primary function of the ABB DO802 is to execute control commands by physically closing or opening relay contacts based on logic signals from the controller. It features 8 normally open (NO) relay contacts, each capable of switching AC or DC loads. The ABB DO802 provides galvanic isolation between the control logic (24 V DC) and the field process voltage, which can range widely, typically supporting 24 V DC up to 230 V AC. This isolation protects the sensitive control system from voltage spikes and electrical noise generated by inductive loads. The ABB DO802 is particularly valued in applications requiring direct switching of higher power circuits without intermediate interposing relays, simplifying panel design and reducing wiring complexity. Its rugged construction ensures the ABB DO802 can withstand harsh industrial conditions, including vibration and temperature fluctuations.

Model: ABB DO802 (Order No. 3BSE022364R1)

Output Type: 8-channel Relay Output (Normally Open contacts).

Control Voltage: 24 V DC (nominal) for coil actuation.

Switching Capacity:

AC: Up to 230 V AC, typically 2 A per channel (resistive load).

DC: Up to 24 V DC, typically 2 A per channel (resistive load).

Note: Derating applies for inductive loads; consult specific load curves.

Isolation: Galvanic isolation between logic side and field side; channel-to-channel isolation may vary depending on baseplate configuration.

Mechanical Life: Typically >10 million operations (no load).

Electrical Life: Varies by load type and current (e.g., >100,000 operations at rated resistive load).

Status Indication: Individual LEDs per channel to indicate output status (energized/de-energized).

Mounting: DIN rail or S800 I/O bus baseplate (e.g., TU810, TU811, TU830).

Proper installation of the ABB DO802 is vital to ensure safe operation and maximize relay life.

Mounting: Secure the ABB DO802 onto a compatible S800 baseplate or DIN rail. Ensure the module locks firmly into the bus connector to establish communication and power.

Wiring Standards: Use appropriately sized cables for the expected load current. For inductive loads (e.g., motor contactors), install suppression circuits (like RC snubbers or freewheeling diodes) across the load terminals, not directly on the ABB DO802 terminals, to prevent arcing and contact welding.

Power Separation: Keep low-voltage control wiring (24 V DC) separate from high-voltage field wiring to minimize interference, leveraging the isolation provided by the ABB DO802.

Terminal Torque: Tighten terminal screws to the specified torque value to prevent loose connections, which can cause overheating and failure of the ABB DO802 contacts.

Environment: Install the ABB DO802 in a control cabinet with adequate ventilation. Avoid areas with excessive dust, corrosive gases, or direct exposure to moisture.

Labeling: Clearly label all field wires connected to the ABB DO802 to facilitate easy identification during maintenance and troubleshooting.

Grounding: Ensure the cabinet and baseplate are properly grounded to protect against electrical faults, although the ABB DO802 itself provides signal isolation.

Configuring and operating the ABB DO802 involves both hardware verification and software setup:

Hardware Check: Before applying power, verify all wiring connections to the ABB DO802 are correct and secure. Ensure no short circuits exist in the field wiring.

Power Up: Apply 24 V DC to the module logic supply. The "Unit OK" LED on the ABB DO802 should illuminate green, indicating healthy communication with the controller.

Software Configuration: In the engineering environment (e.g., Control Builder M), configure the hardware topology to include the ABB DO802 at the correct station and slot.

Logic Mapping: Assign the physical outputs of the ABB DO802 to control variables in the PLC logic. Define any necessary pulse durations or safety interlocks.

Force/Testing: Use the engineering tool to force outputs ON/OFF individually. Observe the corresponding LEDs on the ABB DO802 and verify that the external field devices (e.g., lights, valves) actuate correctly.

Load Verification: Under load, monitor the operation of the ABB DO802. Listen for distinct clicking sounds indicating proper relay actuation. Check for excessive heating at terminals.

Diagnostics: Enable diagnostic reporting in the controller to detect faults such as feedback mismatches (if wired) or communication errors related to the ABB DO802.

While the ABB DO802 is designed for durability, routine maintenance ensures long-term reliability:

Visual Inspection: Regularly inspect the ABB DO802 for signs of overheating, discoloration, or physical damage. Check for dust accumulation that could impede heat dissipation.

LED Monitoring: During plant rounds, verify that the status LEDs on the ABB DO802 match the expected process state. Any unexpected flashing or off-state indicators should be investigated.

Contact Inspection: During scheduled shutdowns, if possible, inspect relay contacts for pitting or welding, especially if the ABB DO802 switches high inductive loads frequently. Replace the module if contact resistance is too high.

Connection Tightness: Re-torque terminal connections on the ABB DO802 periodically to counteract effects of thermal cycling and vibration.

Cleaning: Clean the ABB DO802 and surrounding area with dry compressed air to remove conductive dust or debris.

Spare Parts: Maintain a stock of spare ABB DO802 modules to ensure rapid replacement in case of failure, minimizing production downtime.

Log Review: Analyze system event logs for frequent switching cycles or fault reports associated with the ABB DO802, which might indicate a need for load optimization or module replacement.

Load Limits: Never exceed the maximum switching current or voltage ratings of the ABB DO802. Overloading can cause immediate contact welding or fire hazards.

Inductive Loads: Always use appropriate arc suppression for inductive loads. Failure to do so can drastically reduce the electrical life of the ABB DO802 relays and generate electromagnetic interference (EMI).

Hot Swapping: Although the S800 system supports hot swapping, it is recommended to de-energize field loads before removing or inserting the ABB DO802 to prevent arcing at the terminals.

Environmental Constraints: Operate the ABB DO802 only within its specified temperature and humidity ranges. High humidity can lead to corrosion of relay contacts.

Mechanical Stress: Avoid subjecting the ABB DO802 to excessive mechanical shock or vibration, which can damage the internal relay mechanism.

Compatibility: Ensure the baseplate used is compatible with the ABB DO802. Using incorrect baseplates can lead to poor electrical contact or physical instability.

Safety: Always follow lockout/tagout (LOTO) procedures when working on the wiring of the ABB DO802 to prevent accidental energization of field devices.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.