2789910000 Weidmuller 2789910000 DURA ECO LA-BAT 24V 7Ah Replacement Battery Module

Weidmuller 2789910000 Battery Overview (DURA ECO LA-BAT 24V 7Ah)

The Weidmuller 2789910000, marketed as DURA ECO LA-BAT 24V 7Ah, is a compact 24 V DC battery module designed to buffer DC power systems and ensure controlled shutdown or ride-through for critical 24 V loads. The pack is built with high-quality sealed, maintenance-free lead-fleece batteries (Panasonic cells) and integrates a 100 kΩ NTC temperature sensor. This sensor enables temperature-compensated charging to extend service life and maintain reliable availability across a wide operating range. Its neat mechanical design with plug-in battery and sensor connectors speeds safe installation inside panels and machines.

Engineered for demanding industrial environments, the module supports parallel connection for higher capacity, incorporates dual 25 A fuses for overload and short-circuit protection on the output path, and is evaluated to cULus. The enclosure and terminal geometry are sized for easy cabinet integration: 162 × 158 × 135 mm (W × H × D) with a robust net weight of 6.12 kg for thermal mass and durability. The design meets Protection Class III for SELV systems, aiding compliance in low-voltage auxiliary circuits.

A “Buffer Time vs. Output Current” chart (page 4 of the data sheet) illustrates expected ride-through as load current increases—helpful when right-sizing parallel strings or validating PLC/IPC shutdown budgets. In practical terms, lower output currents deliver longer buffer times, while higher currents shorten autonomy as expected for a 7 Ah pack. Use the curve to match autonomy targets to your load profile.

Key Benefits at a Glance

• Temperature-compensated charging via integrated 100 kΩ NTC for longer battery life.

• Built-in protection with 2×25 A fuses and support for parallel connection to scale capacity.

• Cabinet-friendly size, plug-in wiring, and wide operating temperatures for fast deployment.

Specifications — Weidmuller 2789910000 (DURA ECO LA-BAT 24V 7Ah Replacement Battery)

Sizing tip: Use the buffer-time chart on page 4 to estimate autonomy for your load current. For longer hold-up, either reduce the current draw during buffering (e.g., staged shutdown) or connect modules in parallel to increase effective capacity.

Applications — Where the Weidmuller 2789910000 Excels

Control cabinets and machine automation
Use the DURA ECO LA-BAT 24V 7Ah as a ride-through buffer for PLCs, HMIs, motion controllers, and safety relays. During mains dips or UPS transfer events, the module sustains 24 V rails long enough for controlled stop, data logging, or valve/axis homing. The dual 25 A fuses add a safety layer to downstream wiring, while the Class III SELV classification aligns with typical 24 V auxiliary circuits.

Process and building infrastructure
SCADA RTUs, gateway routers, fire/security panels, access control, and BMS nodes benefit from continued operation across short outages. The wide ambient range (charge down to −15 °C, discharge down to −20 °C) supports utility rooms, substations, and protected outdoor enclosures. Temperature-compensated charging helps preserve capacity across seasonal swings.

Material handling and intralogistics
Conveyors, sorters, AGVs’ fixed infrastructure, barcode/RFID stations, and edge servers often require a DC buffer so logs aren’t lost and network sessions remain intact during brownouts. The module’s high peak output (up to 50 A) accommodates inrush of control loads and brief solenoid pulls, while parallel connection can extend autonomy for longer e-stops.

Industrial computing and data retention
For IPCs, compact servers, and data collectors powered at 24 V, the pack provides the window for OS flush and graceful shutdown, preventing file system corruption. The weight and mechanical robustness, along with shock ratings, suit mounting on cabinet walls in production areas.

Renewables and utilities
In small solar-assisted or remote monitoring sites using 24 Vdc buses, this module can act as a local energy store to bridge cloud cover or backup comms equipment. The wiring ranges and pluggable terminals simplify field service.

Detailed Product Description

The DURA ECO LA-BAT 24V 7Ah is a purpose-built battery module for DC buffering, not just a bare battery. Weidmuller integrates Panasonic sealed VRLA lead-fleece cells, known for tight gas recombination, low maintenance, and reliable float performance. The module’s NTC (100 kΩ) provides real-time temperature feedback to the associated charger or buffer controller to adjust charge voltage—vital in industrial cabinets where ambient temperatures fluctuate with machine load. This design choice extends life and preserves capacity by avoiding over- or under-charge in the cold or heat.

Protection is handled natively: two 25 A fuses are included on the output path to mitigate overloads and short circuits. The ability to connect multiple modules in parallel lets designers scale capacity while sharing current, which is especially convenient when retrofitting existing cabinets with limited footprint. With a specified maximum output current of 50 A, the module can tolerate transient demands typical of control systems (relay banks, contactors, or servo enable lines) during buffering.

Mechanical and environmental characteristics support tough deployments. The device measures 162 mm wide, 158 mm high, and 135 mm deep, and weighs 6.12 kg—dimensions that fit common 300- and 400-mm-deep panels. It’s suitable for storage from −20 to +60 °C and operation across generous charge/discharge ranges; humidity is specified 5–95% RH non-condensing. IEC-based shock and vibration data are provided for wall-mounting, aiding risk assessments on mobile equipment or near heavy machinery. Protection Class III for SELV simplifies integration in low-voltage control circuits, while cULus approval and RoHS conformity support global acceptance.

Electrical connection options are pragmatic: for the power path, rigid conductors from 0.5 to 16 mm² (AWG 24…6) and flexible conductors from 0.5 mm² up to 10 mm² are supported, allowing both light signal harnesses and stout feeders. The temperature probe terminals are a 2-position pluggable screw connector, accommodating 0.2…1.5 mm² (AWG 24…16). These details streamline field assembly and maintenance, particularly when battery packs must be swapped during scheduled service.

Finally, the documentation set (STEP model and instruction sheets) and classification data (ETIM/ECLASS) make it straightforward to incorporate the module into CAD/BOM systems and procurement workflows. The buffer-time chart on the last page offers a quick, visual way to estimate autonomy for your load current—an essential planning tool when balancing hold-up time vs. cabinet space and budget.

Three Quick Features

1. Long life, temperature-aware charging with integrated 100 kΩ NTC sensor.

2. Built-in dual 25 A fuses and 50 A max output for robust buffer performance.

3. Parallel-ready, cabinet-friendly module with broad wiring ranges and approvals.

Note on buffer sizing: Actual autonomy depends on load profile, ambient temperature, and end-of-discharge threshold. Consult the buffer-time curve (page 4) and consider staging non-critical loads off during outages to maximize runtime.