Product Overview
The ABB DO828 is a 16-channel relay output module engineered for the S800 I/O system. It switches loads up to 125V d.c. or 250V a.c. with a maximum continuous output current of 2A per channel. Each output is individually isolated, ensuring reliable operation in demanding industrial environments.
Every channel integrates an optical isolation barrier, an output state indication LED, a relay driver, a relay, and EMC protection components. The DO828 also features relay supply voltage supervision derived from the 12V distributed on the ModuleBus. If the voltage disappears, the Warning LED turns on and an error signal can be read through the ModuleBus—supervision can be enabled or disabled via a parameter.
Key Features & Benefits
- 16 channels for 125V d.c. / 250V a.c. relay outputs
- 16 individually isolated channels
- Output status indicators on the front panel
- OSP (Output State Preset) sets outputs to a predetermined state upon error detection
- Relay supply voltage supervision with Module Error, Module Warning, and Channel Error status indication
Technical Specifications
| Parameter |
Value |
| Article Number |
3BSE069055R1 |
| Type |
Digital Output |
| Signal Specification |
125 V d.c. / 250 V a.c., (5 - 125 V d.c. / 5 - 250 V a.c.), 2 A |
| Number of Channels |
16 |
| Signal Type |
Relay (NO) |
| Isolation |
Individually isolated, channel-to-channel and to circuit common |
| Maximum Field Cable Length |
600 meters (656 yards) |
| Rated Insulation Voltage |
250 V |
| Dielectric Test Voltage |
2000 V a.c. |
| Power Dissipation |
Typ. 3.5 W |
| Current Consumption +5 V Modulebus |
45 mA |
| Current Consumption +24 V Modulebus |
80 mA |
| Current Consumption +24 V External |
0 |
| CE Mark |
Yes |
| Electrical Safety |
EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201 |
| Hazardous Location |
C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2 |
| Marine Certification |
DNV |
| Operating Temperature |
0 to +55 °C (+32 to +131 °F), approvals issued for +5 to +55 °C |
| Storage Temperature |
-40 to +70 °C (-40 to +158 °F) |
| Pollution Degree |
Degree 2, IEC 60664-1 |
| Corrosion Protection |
ISA-S71.04: G3 |
| Relative Humidity |
5 to 95 %, non-condensing |
| Max Ambient Temperature |
55 °C (131 °F), for vertical mounting in compact MTU 40 °C (104 °F) |
| Protection Class |
IP20 according to IEC 60529 |
| Mechanical Operating Conditions |
IEC/EN 61131-2 |
| EMC |
EN 61000-6-4, EN 61000-6-2 |
| Overvoltage Categories |
IEC/EN 60664-1, EN 50178 |
| Equipment Class |
Class I according to IEC 61140; (earth protected) |
| RoHS Compliance |
DIRECTIVE/2011/65/EN (EN 50581:2012) |
| WEEE Compliance |
DIRECTIVE/2012/19/EU |
| Compatible MTU |
TU851 |
| Keying Code |
ED |
| Width |
45 mm (1.77") |
| Depth |
102 mm (4.01"), 111 mm (4.37") including connector |
| Height |
119 mm (4.7") |
| Weight |
0.18 kg (0.4 lbs.) |
Industry Applications
The ABB DO828 excels in applications requiring robust relay switching of AC or DC loads. Typical use cases include:
-
Motor Control Centers: Switching contactor coils in motor starter panels for reliable start/stop operations.
-
Process Control: Actuating solenoid valves in chemical or water treatment plants where isolation between channels is critical.
-
Discrete Manufacturing: Driving indicator lamps, alarms, or small relays in assembly lines, leveraging the OSP feature to maintain safe output states during fault conditions.
Its individually isolated channels prevent ground loops and cross-talk, making the DO828 ideal for mixed-voltage systems where 125V DC and 250V AC loads coexist.
Installation & Setup Guidance
Mount the DO828 on a standard S800 I/O rail using the appropriate TU851 MTU. Ensure the module is correctly keyed (keying code ED) to prevent insertion errors. Connect field wiring to the MTU terminals, respecting the maximum cable length of 600 meters. For vertical mounting in compact MTUs, keep the ambient temperature below 40 °C (104 °F). Before powering up, verify that the relay supply voltage is within the specified range and that the supervision parameter is configured as needed.
Maintenance & Reliability
Regularly inspect the front LEDs for channel status and module warnings. The relay outputs have a finite mechanical life; plan periodic replacement based on switching frequency. Keep the module within the operating temperature range of 0 to +55 °C and relative humidity 5 to 95 % non-condensing. In corrosive environments (ISA-S71.04 G3), ensure proper enclosure protection. The DO828's EMC compliance (EN 61000-6-4, EN 61000-6-2) minimizes electromagnetic interference, reducing false trips and extending service life.
Compatibility & Integration
The DO828 integrates seamlessly into ABB S800 I/O systems. It pairs with the TU851 MTU and communicates via the ModuleBus. The module supports supervision of the 12V relay power converter, with error signals readable through the ModuleBus. It does not support HART, SOE, redundancy, high integrity, or intrinsic safety, so verify system requirements before selection.
Selection Guide & Purchasing Advice
Before purchasing, confirm that your control system is compatible with S800 I/O and that the TU851 MTU is available. Verify the signal specification—125V d.c. / 250V a.c. with a 2A continuous current—matches your load requirements. Check the keying code (ED) and article number (3BSE069055R1) for exact match. PLC Source PRO offers genuine ABB DO828 modules with fast shipping and professional support. Ensure you have the correct MTU and spare relays for maintenance.