ABB DO572 8-Channel Triac Digital Output Module
An eight-channel 120/240 V AC Triac output module with one isolated group per channel and a 0.3 A channel rating.
Product Overview
ABB DO572, article 1TNE968902R2203, provides eight non-latching Triac outputs for high-voltage AC loads. Every channel forms its own isolated group, separating this module from low-voltage transistor and common-group relay output variants.
Performance
- Eight Triac outputs switch rated 120 V AC or 240 V AC loads.
- Each channel is rated up to 0.3 A and is isolated as its own group.
- Resistive and lamp-load switching is specified up to 10 Hz.
- One yellow LED indicates the commanded state of each output.
- The module uses one byte of output process data.
Technical Details
| Manufacturer | ABB |
|---|---|
| Article Number | 1TNE968902R2203 |
| Product Family | AC500 S500-eCo |
| Output Count | 8 Triac outputs |
| Output Grouping | 8 isolated groups, one channel each |
| Output Voltage Class | 100–240 V AC; rated values 120 or 240 V AC |
| Rated Current per Channel | 0.3 A |
| Output Data Length | 1 byte |
| Maximum Resistive-Load Frequency | 10 Hz |
| Maximum Lamp-Load Frequency | 10 Hz |
| Output Protection | External 2 A fast fuse per channel |
| Short-Circuit / Overload Protection | Not integrated |
| Terminal Blocks | One 9-pin and one 11-pin block, ordered separately |
| I/O-Bus Supply Draw | Approximately 10 mA |
| Mounting | Horizontal or vertical |
| Cooling | Natural convection |
| Lifecycle | Active |
System Integration
- Use both the 9-pin and 11-pin S500-eCo terminal blocks selected for the required wiring method.
- Provide external per-channel fusing or circuit-breaker protection because outputs are not internally protected.
- Apply external suppression for inductive AC loads according to the connected load specification.
- Do not hot swap DO572; isolate hazardous output voltages before module or terminal work.
- Maintain physical separation, enclosure and wiring practices appropriate for 120/240 V AC circuits.
Applications
- AC contactor and pilot loads within the documented 0.3 A channel rating.
- Industrial panels requiring eight individually isolated high-voltage AC outputs.
- Building or machine control using compatible AC500 and S500-eCo stations.
- Service replacement where Triac switching must be retained.
- Active spare planning for ABB article 1TNE968902R2203.
FAQ
What output technology does DO572 use?
DO572 provides eight non-latching Triac outputs for AC loads.
How are the channels isolated?
Each of the eight outputs forms its own isolated group.
What voltage and current class applies?
ABB specifies rated 120 V AC or 240 V AC operation with a maximum of 0.3 A per channel.
Does DO572 include short-circuit protection?
No. ABB requires external protection, including a fast 2 A fuse per channel.
Which terminal blocks are required?
The module uses one 9-pin and one 11-pin S500-eCo terminal block, ordered separately.
Can DO572 be hot swapped?
No. ABB lists hot swap as unsupported, and hazardous output voltages must be isolated before service.
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