Schneider AP9922 / AP9922S Battery Management Module

Schneider Electric AP9922 / AP9922S Battery Management Module

The Schneider Electric / APC AP9922 (Main Module) and AP9922S (Expansion Module) are Battery Management System (BMS) controllers designed for precision real-time monitoring, diagnostics, and operational optimization of large stationary VRLA/NiCd battery strings. Operating inside high-availability uninterruptible power supply (UPS) infrastructures, emergency power networks, and shipboard central DC battery plants, the AP9922 tracks individual cell voltages, internal battery resistance, ambient and post temperatures, and total string float current.

The AP9922 integrates seamlessly into SCADA, building management systems (BMS), and power management systems (PMS) via dual RJ-45 Ethernet interfaces and serial interfaces. By catching impending cell thermal runaway, micro-shorts, high-resistance dry-outs, and open connections before system failure, this module safeguards critical operational runtime in high-vibration marine and offshore settings, critical automation sites, and secure data facilities.

Model Details

• AP9922 (Main Module): Serves as the primary master controller equipped with internal processing, network management card (NMC) architecture, dual power feeds, and uplink/downlink communication busses.
• AP9922S (Expansion / Satellite Module): Deployed as a secondary monitoring node interconnected via high-speed expansion bus links to scale up monitoring coverage across additional multi-tier battery racks or parallel strings without requiring supplementary IP addresses.
• Manufacturer Part Numbers (MPN): AP9922, AP9922S
• Manufacturer: Schneider Electric / APC by Schneider Electric

Technical Details

Features

1. Real-Time Individual Cell & String Telemetry: Continuously tracks individual block voltages (2V, 4V, 6V, 12V configurations), string current, ambient thermal envelopes, and inter-tier connection drop across active discharge and float cycles.
2. Predictive Internal Resistance (Ohmic) Testing: Employs proactive micro-load resistance testing algorithms to measure ohmic degradation, isolating failing blocks weeks before catastrophic open-circuit faults occur.
3. Integrated Network & Industrial Bus Architecture: Equipped with local 10/100Base-T Ethernet supporting SNMP (v1/v3), Modbus TCP/RTU, Telnet, HTTP/HTTPS web console, and APC InfraStruxure Central integration.
4. Modular Multi-Tier Scalability via AP9922S: The master AP9922 coordinates multiple daisy-chained AP9922S expansion units over dedicated isolated bus cabling, supporting large-scale vessel plants and modular telecom setups.
5. Dry Contact Relay Triggers & Configurable Alarms: Configurable digital inputs and dry-contact alarm outputs for automated integration into vessel Alarm & Monitoring Systems (AMS), Engine Order Telegraphs, trip coils, or external strobes.

Compatible Power Equipment

• Schneider Electric / APC Symmetra PX Series: Symmetra PX 20kW, 40kW, 80kW, 100kW, and 160kW frames.
• Schneider Electric Galaxy Range: Galaxy 3000, 3500, 5000, 7000, and Galaxy VM/VX lineups utilizing external open-rack or cabinetized battery enclosures.
• Silcon Series & Industrial Inverters: Modular battery banks tied to legacy APC Silcon units and heavy-duty 400V/480V 3-phase industrial UPS frames.
• DC Telecommunications Rectifiers: 48V, 110V, 125V, and 220V power arrays.

Part Number Cross-References

• AP9922: Battery Manager Main Module (Master Controller Unit)
• AP9922S: Battery Manager Expansion Module (Subordinate / Satellite Unit)
• 0J-9922 / 0J-9922S: Internal production assembly designations
• WUPGASSEM7-UG-01: Certified frame integration service kit reference

Frequently Asked Questions

What is the fundamental difference between the AP9922 and the AP9922S?

The AP9922 is the master Main Module containing the core network controller, central processor, external IP interfaces, and primary logic. The AP9922S is a dedicated Expansion Module that does not run an independent IP stack; it links into the AP9922 master via dedicated expansion buses to add monitoring capacity for additional battery blocks or multiple parallel strings.

Can the AP9922 be integrated into third-party marine automation systems?

Yes. The module supports open industrial protocols including Modbus TCP over Ethernet and Modbus RTU via serial interfaces, allowing full integration into marine SCADA, integrated platform management systems (IPMS), and bridge alert management systems (BAMS).

Does the AP9922 draw operational power from the batteries it monitors?

No. The AP9922 features a dedicated auto-sensing AC/DC auxiliary power supply (100–240 VAC) to power its internal electronics, ensuring the monitoring hardware does not create parasitic draw or unbalanced cell drain across the battery strings it measures.

What happens if an AP9922 module experiences a sudden internal processor failure?

The sensing inputs are galvanically and optically isolated with high internal impedance. If the AP9922 processor or auxiliary power goes down, the internal monitoring circuitry fails safe into an open condition, ensuring the host battery bank remains fully functional and unshorted. The system triggers its onboard Form-C trouble relay to alert master watchstanders.

How often does the unit run internal resistance tests?

The resistance testing cadence is fully configurable via the web console or SNMP. It can be scheduled automatically (e.g., weekly, monthly) or manually triggered when the UPS is in a stable float-charge condition. Intelligent safeguards postpone testing if the battery string is currently discharging or recovering from an outage.