ABB DX522, article 1SAP245200R0001, combines eight module-isolated 24 V DC digital inputs with eight relay outputs. The plug-in S500 electronics module also provides a fast counter and operates on a TU531 or TU532 terminal unit.

Manufacturer	ABB
Article Number	1SAP245200R0001
Product Family	AC500 S500
Module Type	Digital input/output module
Digital Inputs	8 channels, 24 V DC
Digital Outputs	8 changeover relay outputs
Relay Output Rating	Up to 230 V AC, 3 A
Additional Function	Integrated fast counter
Process Supply	24 V DC
Input Isolation	Module-wise galvanic isolation
Status Indication	8 input LEDs, 8 relay-output LEDs, supply and error LEDs
Terminal Unit	TU531 screw or TU532 spring terminal unit
XC Variant	DX522-XC is a separate article
Lifecycle	Active

• Combines low-voltage digital sensing and relay switching in one S500 electronics module.
• Provides eight yellow LEDs for the input states and eight for the relay output states.
• Includes a fast-counter channel for supported pulse-counting applications.
• Uses changeover relay contacts rather than transistor outputs.
• Offers a separate DX522-XC article for documented extreme-condition installations.

• Mounts on TU531 or TU532 terminal units; the terminal technology must match the installed station wiring.
• Can be used for central or supported distributed S500 expansion under the applicable AC500 system rules.
• Relay loads must remain within ABB contact ratings and require appropriate external circuit protection.
• The standard DX522 and DX522-XC have different article numbers and should not be interchanged without an environmental review.
• Preserve the process-supply, input wiring and relay contact allocation during module exchange.

• ABB lists standard article 1SAP245200R0001 in the Active lifecycle phase.
• DX531 has four relay outputs and high-voltage inputs, so it is not a functional substitute for DX522.
• DX561 uses transistor outputs and has different field-voltage behavior.
• If an XC unit is installed, retain the XC article rather than replacing it with the standard module.
• Validate all eight inputs, all eight relay contacts and the fast counter after replacement.

What I/O combination does DX522 provide?

It combines eight 24 V DC digital inputs with eight relay outputs.

Are the DX522 outputs transistor channels?

No. DX522 uses changeover relay contacts rated for the documented AC load class.

Which terminal units support DX522?

ABB specifies TU531 with screw terminals or TU532 with spring terminals.

Does DX522 include a counter function?

Yes. The module includes an integrated fast counter in addition to its standard I/O.

Is DX522-XC the same ordering article?

No. DX522-XC is a separate article intended for documented extreme ambient conditions.

What must be tested after a DX522 exchange?

Check the process supply, eight input states, eight relay contact paths and the fast-counter signal.