Description
ABB DO01 Digital Output Module
Product Introduction
When a Symphony Plus control application needs to switch field loads without using mechanical contacts on every channel, the ABB DO01 provides a straightforward transistor-output architecture. It contains 16 independently configured open-collector digital outputs, with each channel capable of sinking or sourcing up to 250 mA at 24–48 VDC. Individual channel isolation is built into the module, which is important when field circuits have different electrical references or when wiring conditions are less predictable than the cabinet drawing suggests.
The module belongs to ABB’s Symphony Plus SD Series I/O family and connects through compatible SD Series mounting/termination units. ABB specifies a 24 VDC module supply, while the field outputs operate from 24–48 VDC. DO01 is not the same device as DO02: the latter adds output overcurrent protection, monitoring, and readback functions. That distinction matters when replacing older I/O or selecting a module for a new control cabinet.
Key Technical Specifications
| Parameter | ABB DO01 Specification |
|---|---|
| Product Model | DO01 |
| Manufacturer | ABB |
| Product Family | Symphony Plus |
| I/O Series | SD Series I/O |
| Product Type | Digital Output Module |
| Number of Channels | 16 |
| Output Type | Open-collector transistor |
| Field Output Voltage | 24–48 VDC ±10% |
| Maximum Output Current | 250 mA DC per channel |
| Channel Isolation | Individually channel-to-channel isolated |
| Field-to-Logic Isolation | Galvanic, 1500 V for up to 1 minute |
| Module Supply | 24 VDC ±10% |
| Module Current | 65 mA typical / 73 mA maximum |
| HART | No |
| SOE | No |
| Redundancy | No |
| Maximum Field Cable Length | 600 m |
| Form Factor | Standard, 190 mm |
| Mounting | Horizontal row or vertical column |
| Service Interface | Mini-USB connection |
| Operating Temperature | -40 to +70 °C |
| Storage Temperature | -40 to +85 °C |
| Relative Humidity | 20–95% at 40 °C, non-condensing |
| Status | Active |
ABB’s current hardware selector lists DO01 as a 16-channel standard-form-factor module and specifies 250 mA maximum output current at 24–48 VDC.
Application Scenarios & Field Considerations
1. Solenoid and actuator control
can be used for DC field loads where the required switching current remains within its 250 mA-per-channel rating. Typical control architectures can include solenoid valves, contactor-interface circuits, annunciation devices, and other discrete field loads. The actual load characteristics still need to be checked; a nominal coil current alone does not tell the whole story when inductive transients are involved.
2. Symphony Plus cabinet expansion
The module is intended for SD Series I/O architectures and can be installed with compatible HBS01 and VBS01 mounting/termination units. ABB lists compatibility with HBS01-FPH, HBS01-FPN, HBS01-EPD, VBS01-FPH, VBS01-FPN, and VBS01-EPD bases.
DO01
3. Legacy I/O replacement
For an existing Symphony Plus installation, can be relevant when expanding a discrete-output section or replacing an existing SD Series output module. Do not treat the part number alone as sufficient for a replacement decision. The base, field wiring arrangement, controller configuration, and function-code configuration should all be checked.
4. Relay interface applications
ABB’s product catalog specifically notes that can be connected to a relay assembly to drive electromechanical relays. This can be useful where the field device requires a contact interface rather than a direct transistor output.
Related Products
- ABB DI03 — 16-channel 24 VDC digital input module; used for discrete field signal acquisition rather than output control.
- ABB DI04 — 16-channel 48 VDC digital input module.
- ABB DO02 — 16-channel digital output module with additional output overcurrent protection, overcurrent monitoring/indication, and output readback.
- ABB DO05 — SD Series digital output module using electromechanical relay contacts rather than transistor outputs.
- ABB RDO01 — redundant digital output module within the SD Series family.
- ABB HBS01-FPH — compatible horizontal mounting/termination arrangement for and other SD Series modules.
- ABB HBS01-FPN — another SD Series horizontal mounting option supporting .
- ABB VBS01-FPH — vertical-column mounting option supporting .
- ABB VBS01-FPN — vertical SD Series mounting arrangement supporting .
Compatibility should be checked against the exact hardware revision and cabinet architecture before treating any related module or base as a direct replacement. ABB’s current selector lists the supported SD Series mounting units explicitly.
Engineer’s Guide — Field Pitfalls to Avoid
1. Don’t confuse with DO02.
Both are 16-channel transistor digital-output modules, but DO02 adds output overcurrent protection, status monitoring, and output readback. If the application depends on those diagnostic functions, substituting changes the I/O behavior.
2. Check the actual field-load current.
The 250 mA figure is a maximum per output channel, not a recommended operating point for every load. Solenoid and relay coils are inductive, so the complete field circuit—including suppression and load interface—needs to be considered.
3. Verify the mounting unit.
is not a standalone field-wiring assembly. ABB lists specific and mounting/termination units for the module. A cabinet with a different base arrangement may require mechanical and wiring changes.
4. Do not assume output redundancy.
The current ABB hardware selector identifies as non-redundant. Applications requiring redundant digital output architecture need to be evaluated against the appropriate redundant I/O product rather than simply installing two modules.
5. Check controller configuration before commissioning.
ABB documents FC 221 for I/O device definition and FC 225 for individual digital-output channel configuration, including behavior such as alarm state and the default state when controller communication is lost. Hardware installation alone does not complete the replacement.
FAQ
Is ABB a digital input or digital output module?
It is a digital output module in the Symphony Plus SD Series. It provides 16 open-collector transistor outputs.
What voltage does the ABB output support?
ABB specifies 24–48 VDC field output operation, with up to 250 mA DC per channel. The module itself uses a separate 24 VDC supply.
How many outputs are available on ?
There are 16 independently configured digital-output channels. Each channel is individually isolated from the other channels.
Can directly drive a relay?
Yes. ABB’s product catalog specifically states that can be connected to a relay assembly for driving electromechanical relays. The relay coil and interface circuit must still be checked against the output limits and application requirements.
Is interchangeable with DO02?
Not automatically. Both provide 16 transistor outputs, but DO02 adds output overcurrent protection, overcurrent status monitoring/indication, and output readback. A replacement should therefore be based on the required diagnostic and protection functions, not just the channel count.
Which Symphony Plus bases support ?
ABB lists -FPH, -FPN, -EPD, -FPH, -FPN, and -EPD among the compatible SD Series mounting units.
What should be verified before purchasing a replacement ?
For a field replacement, verify the complete identification, physical condition, mounting/termination unit, cabinet wiring, controller configuration, and required output behavior. The current ABB documentation identifies as active, but the actual condition of a particular spare must be established from its inventory and inspection records rather than inferred from the model number.
