Klöckner-Moeller PS3-DC 24VDC Compact PLC Controller

Description

Product Introduction & Engineering Value

The PS3-DC is a self-contained PLC designed for machine-control applications where discrete and analog I/O had to fit into a compact controller. It is the DC-powered version of the PS3 platform, rather than a separate power-supply module. Current legacy-part references identify the model as PS3-DC or PS3DC.

That distinction matters when sourcing a replacement. A technician looking only for “PS3” can encounter PS3-AC, PS3-DC, PS3-DC-EE, and PS306 variants. They are not automatically interchangeable. The complete model designation should be matched against the installed controller.

Technical Specifications

The 16 DI / 16 DO / 4 AI / 1 AO configuration and 24 VDC supply are consistently reported across current legacy-parts references. One technical listing additionally specifies a 10 kHz high-speed counter, while another identifies the analog I/O as 0–10 V.

A separate parts listing gives approximate dimensions of 15.2 × 12.7 × 22.9 cm and a weight of approximately 2.1 kg.

Communication and programming

The PS3 platform used Klöckner-Moeller’s legacy programming environment. Historical engineering discussions identify Sucosoft/S30 software and a dedicated interface for connecting a PC to the PLC.

This is an important consideration for maintenance teams. Replacing the hardware is only half the job if the original application program or programming interface is unavailable.

Field Application & the “Trench” Experience

A machine builder has a packaging line that has been operating for decades around a PS3-DC controller. The controller suddenly stops executing the sequence. The I/O wiring checks out, field devices are responding correctly, and the 24 VDC supply is stable.

The maintenance team identifies the failed controller as Klöckner-Moeller PS3-DC. Instead of attempting to redesign the machine around a modern PLC during an emergency shutdown, they source an exact replacement and compare the I/O configuration, terminal arrangement, controller revision, and stored application program.

After installation, the team verifies all 16 digital inputs and outputs, checks the four analog channels and 0–10 V analog output, then runs the machine through its production sequence.

That is where an exact legacy spare earns its keep: the machine’s validated control architecture stays intact.

Specific application scenarios

• Packaging-machine sequence control
• Automated assembly and indexing equipment
• Conveyor and material-feed control
• Machine tooling with mixed digital/analog I/O
• Legacy process skids requiring 0–10 V analog signals
• OEM machinery built around the PS3/PS3000 platform

PS3-DC

PS3-DC

Transparency SOP: QA & Testing

For New Surplus or Refurbished PS3-DC inventory, the controller should be tested as a complete PLC rather than simply powered on.

Inspection → I/O test → application test

1. Identity check
   Confirm the Klöckner-Moeller marking, PS3-DC model, serial number, and hardware revision.
2. Power test
   Apply the correct 24 VDC supply and verify stable startup without abnormal current draw or overheating.
3. Digital I/O test
   Exercise all 16 digital inputs and 16 outputs individually. Check response and terminal integrity.
4. Analog test
   Apply controlled 0–10 V signals to the analog inputs and verify the reported values. Test the analog output across its operating range.
5. Controller test
   Verify RUN behavior, program execution, real-time clock operation, and high-speed counter functionality where applicable.
6. Extended run
   Operate the controller continuously under representative I/O loading and monitor for intermittent faults.

A supplier listing for refurbished PS3-DC equipment describes functional testing as part of its refurbishment process, while another specialist offers repair with a whole-unit warranty.

The Veteran’s Tech Trap Guide

⚠️ Trap 1: Confusing with -EE

These are separate orderable models. Current legacy inventories list PS3-DC 067877 and -EE 017184 separately.

PRO TIP: Put the complete model and article number on the purchase order whenever possible.

⚠️ Trap 2: Assuming a replacement automatically contains your machine program

Do not assume it.

The PS3 platform has a legacy programming architecture, and historical users report that specialized Sucosoft software and interface hardware were required for programming and online access.

Before replacing a failed PLC, determine where the original application program is stored.

⚠️ Trap 3: Forgetting the analog channels

This controller is not simply a 16-in/16-out discrete PLC. It also provides four analog inputs and one analog output, with available documentation identifying 0–10 V analog operation.

A modern replacement must reproduce those functions if the machine depends on them.

⚠️ Trap 4: Treating “PS3” as the complete part number

The PS3 family includes AC and DC versions plus other variants. Current inventories explicitly separate PS3-AC, PS3-DC, PS3-DC-EE, and PS306-DC-EE.

Match the complete suffix.

Dynamic FAQ

Q1. What is the Klöckner-Moeller PS3-DC?

It is a 24 VDC-powered compact PLC controller from the legacy Klöckner-Moeller PS3/PS3000 family. Its documented I/O configuration is 16 digital inputs, 16 digital outputs, four analog inputs, and one analog output.

Q2. What are the PS3-DC’s main I/O specifications?

The controller provides 16 digital inputs, 16 digital outputs, four analog inputs, and one analog output. Available documentation identifies the analog channels as 0–10 V.

Q3. Is PS3-DC the same as PS3DC?

Yes. PS3DC is used as an alternate reference for the Klöckner-Moeller model in legacy parts catalogs.

Q4. What programming software does the PS3-DC use?

The legacy PS3 platform is associated with Sucosoft/S30 programming software and dedicated PC-to-PLC interface hardware.

Q5. Is the PS3-DC still available as a new OEM product?

The PS3-DC is a legacy controller, and current sourcing is primarily through remaining inventory, surplus, used/refurbished stock, or repair services. Legacy suppliers currently list PS3-DC units and repair options.

Q6. Are New Surplus and refurbished PS3-DC units available?

Yes. Current suppliers list PS3-DC units in used, refurbished, and replacement inventories; some offer explicit warranties. For example, Classic Automation currently lists PS3-DC inventory with a stated two-year warranty on surplus parts and repairs.

For a production-critical replacement, request the actual nameplate photograph, article number, I/O test report, program/firmware status, condition classification, and written warranty before purchasing.