ABB DO526 S500 Digital Output Module

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ABB · AC500 / S500 I/O

DO526 Digital Output Module

Eight 24 V DC transistor output channels arranged for clear field wiring, grouped isolation and AC500 control expansion.

Product Overview

ABB DO526 is an S500 digital output module for centralized AC500 expansion or decentralized S500 I/O stations. The exact module provides eight 24 V DC transistor outputs rated at 2 A and uses one-wire field connections. Its outputs are arranged in two groups and are galvanically isolated by group. Status LEDs support rapid channel and process-supply checks. For replacement or new-panel procurement, verify the full DO526 designation, ABB order number, TU542 terminal unit, field power distribution, external protection and the original equipment label before ordering.

Eight-Channel Output Rail

O024 V DC

O124 V DC

O224 V DC

O324 V DC

O424 V DC

O524 V DC

O624 V DC

O724 V DC

Outputs O0–O7 are divided into two galvanically isolated groups. ABB specifies no internal short-circuit or overload protection; coordinate external protection with the field circuit design.

Key Product Information

Manufacturer	ABB
Complete Part Number	DO526
ABB Order Number	1SAP240800R0001
Product Type	S500 digital output module
Series	AC500 / S500 I/O
Output Channels	8 digital transistor outputs
Output Rating	24 V DC / 2 A per output
Connection Method	1-wire
Output Groups	2 galvanically isolated groups
Required Terminal Unit	TU542
Process Supply Voltage	24 V DC
Built-in Output Protection	No internal short-circuit or overload protection
Status Indication	8 yellow output LEDs, 3 green supply LEDs and 2 red error LEDs
Weight	Approx. 135 g without terminal unit
Product Condition	NEW
Warranty	With 1 year warranty

Signal and Power Path

Controller / Interface

The I/O bus exchanges process data with the AC500 CPU or communication interface.

DO526 Module

Eight commanded output states are displayed by yellow channel LEDs.

TU542 Terminal Unit

The terminal unit carries the process-supply and field wiring connections.

Field Loads

External protection and load ratings must match each connected circuit.

Installation Focus

Use the specified TU542 terminal unit.
Verify 24 V DC process supplies UP, UP3 and UP4.
Observe group isolation and field-circuit separation.
Provide external output-channel protection.
Maintain unobstructed natural convection cooling.

Diagnostic Focus

Check eight yellow output-state LEDs.
Confirm the three green process-supply indicators.
Investigate red channel-error indications.
Compare commanded states with measured field voltage.
Inspect wiring and protection before module replacement.

Applications

Solenoid-valve switching

Contactor and relay control

Indicator and alarm outputs

Machine auxiliary circuits

Centralized AC500 I/O expansion

Decentralized S500 output stations

Compatibility and Revision Checklist

✓ Complete DO526 designation

✓ ABB order number 1SAP240800R0001

✓ TU542 terminal unit

✓ 24 V DC field supply

✓ 2 A output load rating

✓ External protection arrangement

✓ Output-group wiring

✓ CPU or interface-module support

✓ Original module label photographs

DO526 FAQ

How many outputs does DO526 provide?

ABB specifies eight 24 V DC transistor outputs, numbered O0 through O7.

What current can each output switch?

The exact DO526 ordering description specifies 2 A per digital output under the documented operating conditions.

Does DO526 include internal short-circuit protection?

No. ABB documentation states that the output groups do not provide internal short-circuit or overload protection, so the field design must include appropriate external protection.

Which terminal unit is required?

ABB ordering data pairs the standard DO526 with the TU542 spring-terminal I/O unit.

Can DO526 be used in centralized and decentralized I/O?

Yes. ABB documents it for centralized AC500 CPU expansion and decentralized S500 communication-interface stations.

What warranty is offered?

This listing is supplied with 1 year warranty under the written quotation terms.

Request a DO526 Quotation

Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.

Email: sales6@apterpower.com WhatsApp: +86 18159889985

Email Sales WhatsApp Sales

Stockoems is operated by Apter Power Limited and is an independent reseller of industrial automation products. Manufacturer names and trademarks are used for identification purposes only.

Service route for ABB DO526

From identity checks to documented dispatch

A structured service route helps buyers verify the requested module, review commercial details, and prepare shipment documentation without implying unconfirmed stock or delivery dates.

Apter Power warehouse handling and module inspection

Three verification gates

Identify

Model and suffix verification compares the requested DO526 designation with the available product and label details.

Validate

Condition confirmation, technical compatibility review, and product and label photo confirmation are coordinated before quotation acceptance.

Prepare

Protective packaging and required shipping documentation are arranged according to the written quotation and destination information.

Apter Power technical documentation and product review

Documented review Product details, label photos, quotation terms, and destination requirements are reviewed as separate checkpoints.

Dispatch control board

Protective packaging
Packaging method is selected for the quoted unit and planned transport route.

Worldwide shipping and shipment tracking
Carrier options and tracking availability are stated in the commercial documents.

Customs documentation
Available export paperwork is prepared according to quotation and destination requirements.

After-sales response
The team records the order context and responds to documented post-delivery questions.

Commercial support without hidden assumptions

Written warranty terms Return authorization process After-sales response

Stockoems coordinates model checks, visual documentation, quotation details, packaging planning, shipment paperwork, and after-sales communication for industrial automation procurement. Availability, dispatch timing, carrier service, and documentation scope remain subject to the written quotation.

Stockoems is operated by Apter Power Limited and is an independent reseller of industrial automation products. Manufacturer names and trademarks are used for identification purposes only.

Request service support for ABB DO526

Send the complete part number, required quantity, destination country, and available product label photos for a focused commercial review.

Email: sales6@apterpower.com
WhatsApp: +86 18159889985

Email Sales WhatsApp Sales

70TXT MODELS

INDEPENDENT PRODUCT LISTINGS

Stockoems Advantage Model Selection

Each entry is an independent product listing and is not presented as a direct replacement. Confirm the manufacturer, complete part number, revision and compatibility before ordering.

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DCN-FCS-D	eTOP504 eTOP504U2P1	AAI835-H53	BS610P-U61-4	PR 5104A
SB-IR-UN	ABB B6-30-01 IEC/EN 60947-4-1	3-PM-IO-INV	STA4D-10	U20NRUD300 000 RS485
SI816N SI816N.A001	67CFSR 250PSI 0-60PSI	CO4，01CO4PRD	MA1472C	03144-1133-0001
JL325A JL325-61001	ASN18 PN:GE9701-10	Brady 76712	PM55A	L5504RVF
125100-1 AUG2820	DB-526	KAS-80-A23-AK	PCS18	B501AP-IV
SDU101 F004	M3200-010210-07604	444-01	SRB301LC	SIGA-REL
Televes 502905	D4-440CPU	PT420	130B7898 T6	LK 600CR 120B1247
AKEC-212R	MD-54 DC 3605-0001	GA530	2624-65058-001	P1900601300
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W7751G1003	1001-70V 33-1720-09 B	GT1155-QSBD GOT1000	RM7823	ADM12-S4
757352BN	ESA047010 SM87HXB	ABB CM579-PNIO/1SAP170901R0001	CLIOPR824A	BOB04 1047000965002
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