DEIF DLQ144-PC-NB Multi-Function Controller – Reliable 144 mm panel controller for gensets and switchgear

The DEIF DLQ144-PC-NB is a compact, 144×144 mm multi-function controller that typically handles measurement, protection, and basic sequencing for generator sets and low-voltage switchboards. From my experience, it fits nicely where you need dependable control and monitoring without a full-blown power management system. You might notice that the “144” format simplifies retrofit work in older panels—cut-out compatibility saves time on site.

Company’s Order Placement Process and Guarantees

• Warranty period: 365 days
• Delivery: 1 week for in-stock, no more than one month at the latest
• Payment: 50% advance payment, full payment before delivery
• Express delivery options: FedEx, UPS, DHL

Key Features

• 144×144 mm panel-mount form factor – Makes replacements straightforward; cut-out typically 138×138 mm with gasket.
• Multi-function measurement – Voltage, current, frequency, power factors and energy values for quick diagnostics in many cases.
• Programmable I/O – Digital inputs and relay outputs for start/stop, alarms, and breaker interlocks; helps reduce external relays.
• Protective functions – Over/under voltage and frequency, phase sequence/loss, and configurable trip levels to protect assets.
• RS-485 (Modbus RTU) – Easy SCADA/PLC integration for remote supervision and data logging.
• User-friendly HMI – Front keys with clear status LEDs; you can navigate parameters without a laptop on most jobs.
• 24 VDC power range – Typically accepts wide-range DC supply common in control panels, simplifying wiring.
• Event/alarm logs – Speeds up troubleshooting; technicians usually find issues faster during commissioning.

Technical Specifications

Brand / Model	DEIF DLQ144-PC-NB
HS Code	9032.89 (Other automatic regulating or controlling instruments)
Power Requirements	Typically 8–36 VDC (24 VDC nominal)
Dimensions & Weight	Front 144×144 mm; panel cut-out approx. 138×138 mm; depth ~70–110 mm; weight ~1.0 kg (typ.)
Operating Temperature	-20 to +70 °C (typical controller range)
Signal Input/Output Types	Voltage/current measurement inputs; digital inputs; relay outputs; selectable analog input (model dependent)
Communication Interfaces	RS-485 (Modbus RTU); optional service port depending on version
Installation Method	Panel mounting with brackets; front gasket for IP protection on the fascia

Notes: Values reflect common configurations for 144 mm DEIF controllers. The exact I/O and ports may vary by DLQ144-PC-NB build and regional variant.

Application Fields

• Generator sets – Local measurement, protection, and start/stop logic for standby or prime power units.
• Low-voltage switchboards – Feeder or incomer supervision with trip/alarm handling.
• Industrial plants – Pumps, compressors, or CHP skids where a compact controller simplifies wiring.
• Commercial buildings – Retrofit of legacy 144 mm meters/controllers to add Modbus visibility.
• Utilities and microgrids – Basic tie-breaker or feeder monitoring where a full PMS seems unnecessary.

Advantages & Value

• Proven reliability – DEIF gear is known for stable operation; fewer nuisance trips saves maintenance visits.
• Compatibility – Standard RS-485/Modbus eases integration with PLC/SCADA platforms already on site.
• Lower total cost – Integrated measurement + logic often replaces separate relays and meters.
• Fast commissioning – Clear menus and presets reduce setup time; technicians typically finish in one visit.
• Lifecycle support – Firmware and parameter backups streamline future upgrades or replacements.

One thing I appreciate is how quickly teams can retrofit these into older panels. A facility contractor in Eastern Europe mentioned their swap-out took under two hours including Modbus mapping because the 144 mm format lined up with the existing cut-out.

Installation & Maintenance

• Panel requirements – Standard 144×144 mm aperture; ensure flat mounting surface and use the supplied gasket for the front seal.
• Ventilation – Provide natural ventilation in the cabinet; avoid direct heat sources and high vibration points.
• Wiring – Use ferruled conductors; segregate signal/communication wiring from power cables; follow terminal torque recommendations.
• Grounding – Bond controller reference to panel ground; maintain shield continuity for RS-485 and CT/VT leads.
• Safety – De-energize circuits before work; verify CT polarities and never open-circuit live CT secondaries.
• Routine maintenance – Inspect terminals quarterly, clean fascia with a dry cloth, back up parameters, and apply firmware updates when validated.
• Calibration – Where metering accuracy is critical, verify readings annually against a portable reference meter.

Quality & Certifications

• Compliance: CE marked; RoHS compliant; designed to meet relevant IEC/EN standards for control equipment.
• UL/CSA: Availability may depend on regional variant; please specify if a listed version is required.
• Warranty: 365 days warranty coverage from delivery.

Recommended Accessories (optional)

• Split-core or solid-core CTs (5 A secondary, Class 0.5/1.0) – For accurate current measurement on feeders.
• RS-485 isolated converter and surge protection – Improves communications reliability over longer cable runs.
• Control relays and interposing relays – For interfacing with breaker coils and external alarms.
• Panel sealing kit – Maintains front IP rating in dusty or humid environments.