ABB DO573, article 1SAP231300R0000, is a 16-channel S500-eCo digital output module. Its normally-open relay contacts are divided into two isolated groups of eight, and the module provides a dedicated status LED for every output.

Manufacturer	ABB
Article Number	1SAP231300R0000
Product Family	AC500 S500-eCo
Module Type	Digital relay output module
Output Count	16 normally-open relay outputs
Output Grouping	2 isolated groups of 8 channels
Supported Output Voltages	24 V DC or 100-240 V AC
Maximum Output Current	2 A per channel
Output Process Data	2 bytes
Process Supply	24 V DC at L+ / M
Process-Supply Current	50 mA
Recommended Output Protection	5 A fast-acting fuse
Maximum Module Dissipation	2.0 W
Terminal Blocks	One 9-pin and one 11-pin block, ordered separately
Mounting	Horizontal or vertical
Lifecycle	Active

• Switches sixteen independent field circuits through non-latching normally-open relay contacts.
• Separates the outputs into two groups of eight with galvanic isolation from the rest of the module.
• Displays all sixteen commanded output states through individual yellow LEDs.
• Uses separate removable 9-pin and 11-pin terminal blocks for field wiring.
• Supports horizontal or vertical installation while relying on unobstructed natural convection.

• Designed for S500-eCo expansion within documented AC500 and AC500-eCo station configurations.
• Requires compatible TA563, TA564 or TA565 terminal blocks in 9-pin and 11-pin versions.
• The relay outputs require external protection because the module does not provide internal short-circuit or overload protection.
• Confirm field-voltage segregation and the applicable relay-contact load before connecting mixed-voltage circuits.
• Use the exact article 1SAP231300R0000 when selecting the electronics module; terminal blocks are separate items.

• ABB lists DO573 in the Active lifecycle phase, so replacement planning should retain the exact article and 16-relay architecture.
• DO571 provides only eight relay outputs and is not a channel-for-channel substitute.
• DO572 uses Triac outputs, while DO561 and DO562 use transistor outputs; none should replace DO573 by appearance alone.
• Record both terminal-block types, field voltages and connected loads before changing the module.
• After replacement, verify the two isolated groups and all sixteen output-state indications.

How many relay outputs are provided by DO573?

DO573 provides sixteen normally-open relay outputs.

How are the DO573 outputs isolated?

The sixteen channels are arranged as two galvanically isolated groups of eight.

Which field voltages can the contacts switch?

ABB documents 24 V DC and 100-240 V AC switching within the stated relay ratings.

Does DO573 include short-circuit protection?

No. ABB specifies external output protection, including a recommended 5 A fast-acting fuse.

Which terminal blocks are required for DO573?

One compatible 9-pin block and one compatible 11-pin block must be ordered separately.

Is DO573 still an active ABB product?

Yes. ABB lists article 1SAP231300R0000 in the Active lifecycle phase.