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ABB DO820 3BSE008514R1 Digital Output Relay Module

Configured for relay-based digital switching in ABB S800 I/O systems, the ABB DO820 3BSE008514R1 (DO820 Digital Output Relay Module) provides direct electrical execution through individually galvanic isolated relay channels. The module handles 8 relay outputs with 24-230 VAC/DC signal capability and 3 A maximum output current.

Hardware Specifications

Parameter	Specification
Model	DO820 3BSE008514R1
Brand	ABB
Product Type	Digital Output Relay Module
Series	S800 I/O
Origin	Sweden
Weight	0.22 kg
Dimensions	4.5 x 10.5 x 12 cm (shipping size)
Operating Temp	Not specified
Power Consumption	Typ. 2.9 W
Signal Specification	230 V AC
Number of Channels	8 relay outputs
Output Type	Normally Open (N.O.) relay outputs
Output Voltage Range	24-230 VAC/DC
Maximum Continuous Output Current	3 A
Rated Insulation Voltage	250 V
Dielectric Test Voltage	2000 V AC
Maximum Field Cable Length	600 m
Event Recording Accuracy	-0 ms / +1.3 ms
Current Consumption +5 V ModuleBus	60 mA
Current Consumption +24 V ModuleBus	140 mA
Mechanics	S800

ABB S800 I/O Relay Output Architecture

The DO820 3BSE008514R1 uses the ABB S800 I/O platform backplane communication structure for module data exchange and output control. The module contains 8 individually isolated relay output channels, and each channel provides electrical separation between the control system interface and field wiring.

Furthermore, the S800 I/O architecture supports I/O density scaling through modular channel expansion. The DO820 receives control commands through the ModuleBus interface and converts digital signals into relay contact switching actions for connected field devices.

Frequently Asked Questions

Q: Does the ABB DO820 3BSE008514R1 provide channel-to-channel isolation?
A: Yes. Each relay output channel uses individual galvanic isolation to separate field circuits and reduce electrical interaction between channels.

Q: What type of field signals can the DO820 handle?
A: The module supports relay output switching for 24-230 VAC/DC field circuits with a maximum continuous current rating of 3 A per channel.

Q: What is the ModuleBus power consumption of the DO820?
A: The module consumes 60 mA from the +5 V ModuleBus supply and 140 mA from the +24 V ModuleBus supply.

Field Installation Guidelines

• Install the DO820 module on an ABB S800 I/O mounting arrangement with correct ModuleBus connection.
• Verify field voltage levels before connecting relay output terminals.
• Separate high-voltage field wiring from low-level signal wiring according to site electrical installation standards.
• Use appropriate cable routing methods to minimize electromagnetic interference.
• Confirm terminal connections and insulation conditions before energizing the output circuits.
• Check relay output states through system diagnostics after installation completion.

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