Modbus RS485 Communication Solution – Schneider Electric ACE949-2 | Altivar Series
Where This Product Is Used
The Schneider Electric ACE949-2 is a dedicated Modbus RS485 communication interface module designed for integration with Altivar ATV31 and ATV71 variable speed drives. It is widely deployed in the following industrial environments:
- HVAC Systems – BMS-controlled fan and pump speed regulation in commercial buildings
- Water & Wastewater Treatment – Remote PLC monitoring of pump drives via Modbus RTU networks
- Conveyor & Material Handling – Centralized SCADA control of multi-drive conveyor lines
- Packaging Machinery – Synchronized drive control through Modbus master PLCs (Schneider M340, M580, Siemens S7)
- Process Manufacturing – Integration into DCS environments requiring RS485 fieldbus connectivity
- OEM Machine Builders – Standardized communication card for ATV-series drive panels
Technical Specifications
| Part Number | ACE949-2 |
| Brand | Schneider Electric |
| Series | Altivar (ATV31 / ATV71) |
| Module Type | Communication Interface Card |
| Protocol | Modbus RTU / RS485 |
| Compatible Drives | ATV31, ATV71 series |
| Connector | RJ45 (Modbus port) |
| Baud Rate | Up to 19,200 bps |
| Power Supply | Supplied by host drive |
| Weight | 300 g |
| Country of Origin | France / EU |
Why Engineers Specify This Model
- Plug-and-play integration – Slots directly into the ATV31/ATV71 option card bay; no external power required
- Modbus RTU native support – Full read/write access to drive parameters, fault codes, speed references, and I/O status
- Multi-drop network capability – Supports up to 247 nodes on a single RS485 bus segment
- Proven field reliability – Widely specified in Schneider-based automation panels globally
- Firmware-transparent – Compatible across all ATV31/ATV71 firmware revisions without configuration changes
Complete System Bill of Materials
For a complete Modbus-networked ATV drive system, engineers typically specify:
- ACE949-2 – Modbus RS485 communication interface (this item)
- ATV31 or ATV71 series variable speed drive (host unit)
- Shielded twisted-pair RS485 cable (Belden 9842 or equivalent)
- Modbus master PLC or SCADA gateway (e.g., Schneider M340, M580, or third-party)
- Terminal resistor (120 Ω) for end-of-line RS485 termination
- DIN rail enclosure with appropriate IP rating for the installation environment
Compliance & Industry Standards
- CE Marked – Compliant with EU Low Voltage and EMC Directives
- UL Listed – Recognized for use in North American industrial installations
- Modbus.org compliant – Conforms to Modbus RTU specification
- RoHS compliant – Restriction of Hazardous Substances Directive
- IEC 61800-3 – EMC requirements for adjustable speed electrical power drive systems
Quality Assurance & Sourcing
All ACE949-2 units supplied by Konmask.com are:
- Sourced from authorized Schneider Electric distributors or verified industrial surplus channels
- Inspected for physical integrity, label authenticity, and connector condition prior to dispatch
- Shipped with original packaging where available
- Backed by Konmask’s 30-day return policy for DOA (Dead on Arrival) units
How to Source This Part
- Click Add to Cart and proceed to checkout for standard online orders
- For bulk orders (5+ units), contact [email protected] for volume pricing
- Lead time: In-stock units ship within 1–3 business days; ex-stock orders within 7–14 days
- Export documentation (CO, packing list, commercial invoice) available on request
Application-Specific FAQ
Q: Is the ACE949-2 compatible with ATV312 drives?
A: The ACE949-2 is designed for ATV31 and ATV71 series. ATV312 uses a different option card slot; please verify compatibility with Schneider’s documentation before ordering.
Q: Can I use ACE949-2 with a Siemens S7-1200 Modbus master?
A: Yes. The ACE949-2 is a standard Modbus RTU slave device and is compatible with any Modbus RTU master, including Siemens S7-1200/1500 with CM 1241 RS485 modules.
Q: What is the maximum cable length for the RS485 network?
A: RS485 supports up to 1,200 m (4,000 ft) at lower baud rates with proper shielded cable and termination resistors.
Q: Does this module support Modbus TCP/IP?
A: No. The ACE949-2 supports Modbus RTU over RS485 only. For Modbus TCP/IP, refer to the VW3A3616 Ethernet card for ATV71.
Q: Is a configuration tool required for setup?
A: Basic Modbus address and baud rate are configured via the ATV drive keypad. No separate software tool is required for standard commissioning.
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