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ABB DO828 Digital Output Module

The ABB 3BSE069055R1 DO828, also cataloged as the DO828 Digital Output Module, provides relay-based switching execution for 125 VDC and 250 VAC field circuits within the ABB S800 I/O system. The module contains 16 individually isolated relay output channels with optical isolation, relay drivers, status indication, and EMC protection.

Hardware Specifications

Parameter	Specification
Model	DO828
Product ID	3BSE069055R1
Brand	ABB
Product Type	Digital Output Module
Series	S800 I/O
Signal Type	Relay Output, Normally Open (NO)
Signal Specification	5 to 125 VDC / 5 to 250 VAC, maximum 2 A
Number of Channels	16
Output Voltage	Maximum 125 VDC / 250 VAC
Channel Isolation	Individually isolated channel-to-channel and circuit common
HART Support	No
SOE Support	No
Redundancy	No
High Integrity	No
Intrinsic Safety	No
MTU Compatibility	TU851
Keying Code	ED
Origin	Sweden
Weight	0.18 kg
Dimensions	45 mm width x 102 mm depth x 119 mm height
Operating Temp	0 to +55 deg C
Storage Temp	-40 to +70 deg C
Power Consumption	Typical 3.5 W
ModuleBus Current Consumption	+5 VDC: 45 mA; +24 VDC: 80 mA
External +24 VDC Consumption	0
Maximum Field Cable Length	600 m
Rated Insulation Voltage	250 V
Dielectric Test Voltage	2000 VAC
Protection Class	IP20 according to IEC 60529
EMC Compliance	EN 61000-6-4 and EN 61000-6-2
Safety Standards	EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201

ABB S800 I/O Relay Output Architecture

The DO828 uses the ABB S800 I/O backplane communication structure for module control and diagnostics. Each output channel contains an optical isolation barrier, relay driver stage, relay switching element, output LED indication, and EMC protection components.

The module supports industrial control circuits requiring isolated relay contacts. Additionally, the relay supply voltage supervision monitors the 12 V distribution from the ModuleBus. If the relay supply disappears, the module generates an error signal and activates the Warning LED. The supervision function can be enabled or disabled through configuration parameters.

The S800 I/O platform provides modular I/O density scaling through distributed ModuleBus communication. Therefore, the DO828 integrates directly with ABB controller systems using standardized I/O addressing and diagnostic handling.

Frequently Asked Questions

Q: Does the ABB DO828 provide channel-to-channel isolation?
A: Yes. Each of the 16 relay output channels provides individual isolation between channels and the circuit common.

Q: Does the DO828 require an external 24 VDC field supply?
A: No. The module specifies 0 mA external +24 VDC consumption. Relay supply monitoring uses the 12 V distribution available through the ModuleBus.

Q: Which ABB Module Termination Unit is compatible with the DO828?
A: The DO828 is designed for use with the ABB TU851 Module Termination Unit and uses the ED keying code.

Field Installation Guidelines

Install the DO828 module on the ABB S800 I/O mounting arrangement with the specified TU851 Module Termination Unit. Verify that the module keying code matches the installed MTU before commissioning.

Connect relay output field wiring according to the specified voltage and current limits. Maintain separation between relay output wiring and sensitive signal cables to reduce electrical interference.

Confirm protective grounding, cabinet bonding, and EMC installation practices before applying field power. Check front LED indicators after startup to verify module operation, channel status, and relay supply supervision status.

Ensure ambient temperature, humidity, pollution degree, and enclosure conditions remain within the specified operating limits.

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