Features:
- Normally open relays: Eight channels switch the ABB-documented AC or DC load range.
- Individual isolation: Each output is isolated from the other channels and circuit common.
- Relay supervision: Internal relay-power monitoring reports a warning when its supply is lost.
This ordering code is the normally open relay variant and must not be confused with DO821 normally closed or transistor DO810 outputs.
The module isolates and switches field loads while reporting output state and relay-power supervision through S800 I/O.
Confirm voltage category, load current and inrush, contact suppression, MTU voltage class, terminal spacing, OSP, and safety isolation before installation.
Availability is subject to Apter Power inventory and sourcing confirmation.
DO820 3BSE008514R1 Manuals, Datasheets, and Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
DO820 3BSE008514R1 S800 I/O Normally Open Relay Output Module Specifications
General
- ManufacturerABB
- ModelDO820 3BSE008514R1
- ConditionNew and factory sealed
- Product FamilyABB S800 I/O
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Contact-duty review
- AC or DC: Classify every connected load before selecting protection.
- Inrush: Check starting or capacitive current against the load design.
- Inductive loads: Provide the approved suppression outside the relay contact.
- Duty cycle: Review switching frequency and expected contact life.
Channel separation checks
- Individual channels: Preserve isolation between every relay circuit.
- Circuit common: Do not add unintended common connections.
- Voltage segregation: Maintain cabinet spacing and wiring separation.
- Grounding: Apply the site protective-earth and shielding design.
250 V MTU preparation
- Approved list: Use only an ABB-listed MTU for DO820.
- Voltage class: Confirm the 250 V termination requirement.
- Fuse plan: Match external and MTU protection to each load.
- Keying: Verify keying code AD and the installed base.