Product Overview

The ABB 35AE92A​ (spare part / order code ER0002081060005) is a rechargeable memory backup battery pack / battery module produced by ABB for use with its Advant OCS, Symphony Plus Harmony rack processors (PPC900 series such as PPC907BE mounted on 07KT97 / 07KT94 bases), AC450 / AC800 / Freelance AC800F controllers, and certain 07-series base units equipped with a battery holder or direct battery input. The 35AE92A​ / ER0002081060005​ typically consists of one or two sealed nickel-metal-hydride (Ni-MH) or nickel-cadmium (NiCd) cells in a flame-retardant ABS housing with a pre-wired polarized connector that mates to the designated battery port on the CPU base (commonly the 07BT62 battery holder or directly to the 07KT97 / 07KT94 base unit’s battery jack). Its primary function is to maintain the contents of the controller’s battery-backed RAM (user retentive data, setpoints, recipe values, and sometimes the real-time clock / calendar) during main power outages and to provide hold-up time measured in days to weeks depending on RAM size and ambient temperature.When installed in a powered-up system, the 35AE92A​ is trickle-charged from the base unit’s 5 V DC logic supply through a temperature-compensated charge circuit that prevents overcharge and maximizes cell life. Upon loss of AC / DC control power, the battery seamlessly takes over, drawing only the leakage current of the RAM’s V_BATpin—typically micro-amps—thus preserving retentive data for 30–90 days (often specified ≥ 30 days at 25 °C for a fresh, fully-charged pack). The 35AE92A​ / ER0002081060005​ is a consumable maintenance item: ABB generally recommends replacement every 3–5 years or when the controller reports a “Battery Low” condition via its diagnostics. Because the 35AE92A​ is a plug-in module with no configuration requirement, it can be hot-swapped on systems that support live battery replacement (with main power present so the RAM is still powered from the backplane) without losing retentive data. The 35AE92A​ / ER0002081060005​ is an essential MRO spare for any plant running ABB Advant OCS, Symphony Plus Harmony, or AC800-family controllers that rely on battery-backed RAM for process setpoints and sequence state—its presence and periodic replacement directly prevent costly “cold start” conditions where retentive memory is lost and the plant must be re-initialized from backups after an unplanned power outage.

Technical Specifications

Main Features and Advantages

The ABB 35AE92A​ (ER0002081060005) is a mission-critical consumable that safeguards process continuity by preserving controller memory and real-time clock during power loss—its key strengths lie in seamless integration, long hold-up, and hassle-free maintenance.Direct plug-in to ABB controller bases with automatic charging: The 35AE92A​ connects via a keyed polarized connector that only fits the designated battery port on 07KT97, 07KT94, 07KR62, or the appropriate AC800M / AC800F base unit. Once the controller is powered, the base’s intelligent charge circuit trickle-charges the 35AE92A​ at a rate matched to the cell chemistry and temperature—no external charger, no setup, no calibration. A fully charged 35AE92A​ typically sustains retentive RAM for 30–90 days (specified minimum 30 days at 25 °C with a fresh pack), giving plants ample time to restore power after an extended outage without losing setpoints, recipe data, or sequence step pointers.Hot-swappable replacement without data loss (when main power present): Because the controller’s RAM is still powered from the 5 V DC backplane when the plant’s 24 V DC control supply is ON, the 35AE92A​ can be unplugged and a new one inserted without any loss of retentive memory—provided the exchange is done with control power applied. This “live change” capability is crucial during preventive maintenance outages where the objective is to refresh aging batteries without disturbing the running process. Clear “Battery Low” / “Battery Fail” diagnostics are reported through the controller’s status word and are visible in Control Builder M / S+ Engineering or via the operator HMI, prompting timely replacement before the hold-up capacity degrades below safe margins.Broad compatibility across ABB legacy and current platforms: The 35AE92A​ / ER0002081060005​ is specified for Advant OCS (AC450 with 07KT94/07KR62), Symphony Plus Harmony nodes (PPC907BE on 07KT97), Freelance AC800F CPUs with battery option, and AC800M (PM8xx) processors ordered with the battery submodule. This cross-platform commonality simplifies MRO inventory—one spare battery type covers multiple generations of ABB control equipment in the same plant, reducing part proliferation and the risk of specifying the wrong battery during emergency replacement.Robust industrial packaging and polarity protection: The cells are potted or housed in a flame-retardant ABS case with strain-relieved cable and polarized connector to prevent reverse insertion (which could damage the base’s charge circuit). The 35AE92A​ is designed to withstand the vibration and temperature cycling typical of control room and local MCC/enclosure environments and is shipped with a protective cap over the connector to prevent shorting prior to installation.Clear lifecycle management guidance: ABB publishes expected battery service life (typically 3–5 years) and “Battery Low” threshold criteria in the controller hardware manuals (e.g., 07KT97 Hardware Manual, PPC900 Installation Guide). The 35AE92A​ is supplied with a date code / lot code, enabling maintenance teams to implement a scheduled battery replacement program—replacing all controller batteries in a unit during a planned outage rather than waiting for individual low-battery alarms—further reducing unplanned memory-loss risk.Environmentally conscious options: Newer shipments of the 35AE92A​ / ER0002081060005​ use Ni-MH chemistry (RoHS-compliant in most markets) rather than NiCd, reflecting ABB’s phase-out of cadmium-containing cells where application-equivalent performance can be achieved. Both chemistries are functionally interchangeable in ABB base units, though NiCd versions may still be supplied in some regions—verify local environmental regulations regarding disposal/recycling.