Description
REOTRON 567LH-DP24 | Thyristor Power Controller | PROFIBUS-DP Heating Control
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 567LH-DP24 |
| Manufacturer | REO Elektronik AG |
| Brand | REOTRON |
| Product Type | Digital three-phase thyristor power controller |
| Power Technology | SCR / Thyristor |
| Main Supply | 3 × 400 VAC ±10%, 50/60 Hz* |
| Controlled Output | Up to approximately 400 VAC* |
| Reported Current | 40 A* |
| Control Modes | Phase-angle / Burst-Fire |
| Communication | PROFIBUS-DP |
| Analog Setpoint | 0–10 V / 4–20 mA* |
| Feedback | Voltage/current/power feedback* |
| Control Supply | 24 VDC* |
| Protection | Overcurrent, overvoltage, undervoltage, phase-loss and thermal protection* |
| Enclosure Rating | IP20* |
| Typical Load | Resistive industrial heating |
| Mounting | Control cabinet |
*These values are based primarily on secondary technical listings and should be confirmed against the unit nameplate or original REOTRON documentation before being treated as purchasing specifications. The strongest available identification consistently places the 567LH-DP24 in the REOTRON 567 three-phase thyristor power-controller family with PROFIBUS-DP.
Important Part-Number Clarification
The DP24 suffix should not automatically be interpreted as “24 VDC output.” One secondary listing explicitly describes the DP24 version as having PROFIBUS-DP plus a 24 VDC control supply, while the same listing identifies the main power path as 3 × 400 VAC.
A separate supplier incorrectly describes the same part as a 24 VDC, 4.2 A DC power controller. That specification set conflicts with the more consistent 567LH-DP24 identification and should be treated as unreliable.
Product Introduction
The REOTRON 567LH- is a digital three-phase thyristor power controller designed to regulate electrical power supplied to industrial loads. The 567LH family uses SCR control, with phase-angle and burst-fire operating modes reported for the configuration. PROFIBUS-DP provides the control-system interface for applications where power regulation is managed from a PLC or DCS.
The most likely application is industrial process heating, particularly resistive loads where controlled AC power is required. The controller should therefore be evaluated as a power-electronics device rather than a servo drive, PLC module, or 24 VDC power supply.
567LH-DP24
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
The primary procurement risk with is incorrect specification matching. Several online records assign completely different functions to this part number, including DC power conversion and servo control. Those descriptions are not consistent with the stronger identification of the unit as a REOTRON 567-series thyristor controller.
Typical Applications
- Industrial Heating Systems — controlled power to resistive heating elements.
- Furnaces and Ovens — three-phase electrical heating zones.
- Plastic Processing Equipment — controlled heating of barrels, dies, and process zones.
- Thermal Processing Lines — PLC/DCS-supervised power regulation.
- Legacy PROFIBUS-DP Systems — remote setpoint and status integration.
Technical Pitfalls to Avoid
- Do not specify it as a 24 VDC output power supply.
The available evidence indicates that 24 VDC relates to the control electronics, while the primary controlled power circuit is a three-phase AC path. - Confirm the current rating from the nameplate.
A 40 A configuration is reported, but this should not be generalized to every unit carrying the 567LH- designation. - Check the PROFIBUS-DP configuration.
Verify the station address, PLC hardware configuration, GSD file, telegram configuration, and diagnostic handling before commissioning a replacement. - Match the control mode to the process.
Phase-angle control and burst-fire control produce different electrical behavior. Heater characteristics, transformer compatibility, harmonics, and temperature-loop requirements should be considered before changing the control mode. - Inspect the complete power circuit.
If the SCR controller has failed, check semiconductor protection, upstream fusing, phase balance, cooling, cabinet airflow, heater resistance, and load insulation. Replacing the controller without finding the original failure mechanism can result in another semiconductor failure.
Related Products
- REOTRON 567LH Series — broader three-phase thyristor power-controller family.
- REOTRON 567LH- — PROFIBUS-DP configuration of the 567LH family.
- REOTRON 567LH variants — different current, voltage, and interface configurations may exist; suffix matching is required.
- REOTRON thyristor power controllers — related equipment for industrial heating and controlled AC power applications.
- REO Elektronik power controllers — broader SCR/thyristor control product family.
Procurement Note
For REOTRON 567LH-, the purchasing specification should include the complete part number plus:
- Main AC supply voltage
- Rated output current
- Load type and power
- PROFIBUS-DP requirement
- Control supply
- Phase-angle or burst-fire requirement
- Analog setpoint/feedback configuration
- Hardware or firmware revision
- Existing PLC/DCS PROFIBUS configuration
The most important correction is this: 567LH- should be treated as a REOTRON three-phase SCR power controller with PROFIBUS-DP, not as a 24 VDC/4.2 A power supply and not as a servo drive. The available technical evidence supports the former identification much better.
For a critical replacement, the nameplate photo is worth more than a generic online specification sheet because the available secondary records for this part number contain clear technical contradictions.
