C9900-U330 Beckhoff
Wake Industrial LLC is not an authorized distributor of this product.
The Beckhoff C9900-U330 is part of the C9 PC Accessories series and uses VRLA-AGM battery technology with a nominal capacity of 3.4 Ah and a voltage of 24 V. This unit has a weight of 3.3 kilograms and features a stainless steel housing and 9 A fuse protection. It supports a maximum cable length of 10 meters and is built with 2 x 12 V batteries in series.
Internal Product Review
The C9900-U330 is a Beckhoff battery module built with VRLA-AGM technology and a 24 V nominal voltage. Stainless steel housing and 9 A / 30 V PTC fuse protection make the unit a dependable choice for stable backup power.
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Product Description:
The C9900-U330 belongs to the Beckhoff C9 PC Accessories series and is a battery-based accessory intended to maintain DC supply lines in industrial control panels. By grouping battery blocks in series, the unit matches the supply level commonly used by programmable controllers, Industrial PCs, and field terminals. It is offered as an add-on for Beckhoff Industrial PC families, allowing continued operation during brief power interruptions. This buffered supply arrangement can help prevent nuisance shutdowns and preserve control availability while upstream power recovers.
The electrical performance centers on a nominal output of 24 V. A nominal capacity of 3.4 Ah indicates how long the connected load can draw current before recharge is required. The pack impedance is limited to 120 mOhm, which helps reduce voltage sag during rapid current changes. For fault containment, a resettable fuse rated at 9 A / 30 V PTC limits sustained overcurrent events. Field wiring enters through a 5-pin, 2-wire terminal strip, and up to two conductors can be landed per point to support daisy-chain layouts. Conductors with a cross-section of 1.5 mm² (AWG14) fit without ferrules, and the recommended cable length is limited to 10 m to keep loop resistance within a practical range. The sealed VRLA-AGM battery chemistry is maintenance-free and avoids electrolyte checks in cabinet environments.
A stainless-steel housing protects the cells, and the overall size of 157 × 70 × 175 mm fits control cabinet installations where space must be managed carefully. The unit weighs 3.3 kg, which keeps handling and mounting straightforward. The compact form also allows the accessory to sit near the supported load, which helps simplify short cable routing inside the enclosure. Operation is permitted where relative humidity does not exceed 95% RH, and the assembly withstands mechanical shocks up to 5 G (30 ms). These limits suit equipment that may experience cabinet door impacts or vibration during transport and routine machine movement.
