AMETEK Sorensen DLM60-10 Programmable DC Power Supply – DLM Series

AMETEK Sorensen DLM60-10 – 600 W Programmable DC Power Supply in Industrial Control Loops

The DLM60-10 occupies a well-defined role in precision power delivery: it functions as the regulated DC source node within automated test equipment (ATE) racks, burn-in systems, and process-control calibration benches. Its 60 VDC / 10 A output envelope covers the majority of low-voltage actuator, sensor, and transducer excitation requirements encountered in industrial automation and defense electronics. Unlike switch-mode architectures that trade noise performance for efficiency, the DLM60-10 employs a linear regulation topology with a high-frequency pre-regulator front end — a deliberate design choice that keeps output ripple below 1 mV rms, a figure that matters when the downstream load is a precision analog measurement chain or a noise-sensitive RF subsystem.

In a closed-loop control architecture, the DLM60-10 sits between the AC mains distribution panel and the device under test (DUT) or field instrument. The remote sense terminals at the rear panel close the regulation loop at the load terminals rather than at the supply output connectors, compensating for up to 0.5 V of resistive drop across interconnect wiring. This is not a cosmetic feature — in high-current test fixtures where 10 A flows through several meters of 18 AWG lead wire, the resulting IR drop can exceed 200 mV, which would otherwise appear as a regulation error. The sense loop eliminates this offset, maintaining output accuracy at the point of load regardless of cable impedance.

The analog programming interface accepts 0–5 V or 0–10 V control signals, enabling direct integration with DAC outputs from PLC analog modules, NI DAQ cards, or SCADA systems without intermediate signal conditioning. The RS-232 and GPIB (IEEE-488) interfaces on the M23 variant allow deterministic command execution from LabVIEW, Python (pyvisa), or MATLAB instrument control toolboxes, making the DLM60-10 a standard node in automated test sequences where voltage and current setpoints must be swept programmatically across defined test vectors.

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Technical Parameters

Hardware Logical Analysis

Linear + Pre-regulator Hybrid Topology: The DLM60-10 does not rely on a pure linear pass stage, which would dissipate excessive heat at high input-to-output differentials. Instead, a switch-mode pre-regulator tracks the output setpoint and maintains a controlled headroom voltage (typically 3–5 V) across the linear pass transistors. This reduces the power dissipated in the pass stage by 60–70% compared to a conventional linear supply operating from a fixed transformer secondary, while preserving the sub-millivolt noise floor that defines the DLM Series. The result is a thermal profile that remains within safe operating area (SOA) across the full output range without requiring oversized heatsinks or high-velocity cooling.

EMC Design Architecture: The AC input stage incorporates a multi-stage EMI filter — common-mode choke, differential-mode capacitors, and a line filter network — that attenuates conducted emissions to CISPR 11 Class B levels. The pre-regulator switching frequency is set above 100 kHz, pushing harmonic energy well above the 150 kHz lower boundary of conducted emission measurement bands, and the output filter LC network provides additional attenuation of switching artifacts before they reach the output terminals. Ground plane continuity between the chassis, input filter, and output return is maintained through low-impedance copper straps, minimizing ground loop susceptibility in rack environments where multiple instruments share a common safety earth.

CV/CC Crossover Logic: The control loop implements a seamless transition between constant-voltage (CV) and constant-current (CC) modes through a dual error-amplifier architecture. Both amplifiers operate simultaneously; the one with the lower output drives the pass element gate. This OR-tied topology eliminates the transient spike that occurs in single-amplifier designs when the operating mode switches — a critical requirement when the DUT is a capacitive load or a battery under charge, where a momentary voltage overshoot can cause irreversible damage. Front-panel LEDs provide unambiguous mode indication without requiring the operator to monitor output meters.

OVP Crowbar Circuit: The over-voltage protection circuit uses a thyristor (SCR) crowbar triggered by a precision voltage comparator. When the output exceeds the OVP setpoint — adjustable from 10% to 110% of rated voltage — the SCR fires within microseconds, clamping the output to near zero and blowing the internal fuse. This hard-clamp response is faster than any software-based protection scheme and is independent of the main control loop, ensuring DUT protection even in the event of a control circuit failure.

System Integration Benefits

• Deterministic analog programming: The 0–5 V / 0–10 V analog input responds within the control loop bandwidth (< 1 ms), enabling real-time voltage profiling from PLC analog outputs without GPIB latency overhead.
• GPIB multi-drop bus compatibility: Up to 14 DLM60-10 units can share a single GPIB bus, allowing a single controller to sequence multiple power channels in a multi-rail ATE fixture without additional hardware.
• Remote sense loop closure: Eliminates wiring resistance errors at the load, maintaining ±0.05% output accuracy at the DUT terminals regardless of interconnect length up to the 0.5 V compensation limit.
• Adjustable OVP setpoint: Allows the protection threshold to be configured per-DUT, preventing nuisance trips on high-voltage transient loads while still protecting sensitive low-voltage devices.
• Output inhibit signal: TTL-compatible remote inhibit input allows the ATE controller to disable the output between test steps without issuing a GPIB command, reducing sequencing latency in high-throughput test cells.
• Stable CV/CC crossover: Transient-free mode switching protects capacitive and battery loads from voltage spikes during current-limit transitions, eliminating the need for external protection diodes in most applications.
• Low output impedance: The linear regulation topology maintains output impedance below 5 mΩ across the audio frequency band, ensuring that load-induced voltage variations do not propagate back into the measurement chain as common-mode noise.
• Rack-mount form factor: 2U height with standard 19-inch rack ears allows integration into existing ATE cabinets alongside signal generators, DMMs, and oscilloscopes without requiring a dedicated power supply bay.

Quality Assurance & Global Logistics

Every DLM60-10 unit dispatched from our Xiamen facility undergoes a structured pre-shipment verification protocol before it is released for export. Output voltage and current are calibrated against a traceable reference standard; OVP and OCP thresholds are verified at the programmed setpoints; RS-232 and GPIB communication are confirmed with a loopback command sequence. Units that do not meet the original AMETEK Sorensen factory acceptance criteria are quarantined and not shipped.

Packaging is engineered for international freight: the unit is placed in an ESD-safe anti-static bag, surrounded by 50 mm closed-cell polyethylene foam on all six faces, and sealed in a double-wall corrugated export carton rated for 32 ECT. Shock-watch indicators are applied to the outer carton; any evidence of mishandling in transit is documented and a replacement claim is initiated without requiring the customer to return the damaged unit first.

Logistics from Xiamen, China to major industrial hubs in Europe, North America, Southeast Asia, and the Middle East typically completes in 3–7 business days via DHL Express or FedEx International Priority. EXW Xiamen and DAP destination Incoterms are both available. Commercial invoice, packing list, and Certificate of Conformance (CoC) are included with every shipment; CITES, RoHS, and REACH documentation is available on request for regulated procurement environments.

The 12-month warranty covers defects in materials and workmanship under normal operating conditions. Warranty service is handled directly from Xiamen; failed units are repaired or replaced and returned via express courier at no additional freight cost to the buyer within the warranty period.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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