HELMHOLZ 700-600-CAN12 CAN 300 PRO – CANopen Master/Slave Communication Module | SIMATIC S7-300 Platform
Engineering Background: The HELMHOLZ CAN 300 PRO (Part No. 700-600-CAN12) is a high-performance CANopen communication module engineered for seamless integration with the SIMATIC S7-300 programmable logic controller platform. Developed by HELMHOLZ GmbH & Co. KG — a German specialist in industrial automation interfaces — this module addresses the critical need for deterministic, real-time fieldbus communication in demanding manufacturing and process environments.
Product Positioning: Designed for procurement engineers and system integrators who require a certified, plug-and-play CANopen interface without custom firmware development. The CAN 300 PRO supports both Master and Slave operating modes, enabling flexible network topologies across automotive assembly lines, material handling systems, and precision motion control applications.
Complete Technical Specifications
- Part Number / SKU: 700-600-CAN12
- Series / Platform: CAN 300 PRO | SIMATIC S7-300 Compatible
- Communication Standard: CANopen (CiA DS-301, DS-302, DS-305)
- Operating Mode: CANopen Master & Slave (selectable)
- Baud Rate: 10 kbps – 1 Mbps (auto-detect capable)
- Max. Network Nodes: Up to 127 CANopen nodes
- Process Data Objects (PDO): Up to 512 PDOs configurable
- Service Data Objects (SDO): Supported (expedited & segmented)
- Backplane Interface: S7-300 expansion bus (non-CPU slot)
- Connector: 9-pin D-Sub (DB9) male, CAN_H / CAN_L / GND
- Isolation: Galvanic isolation on CAN interface
- Supply Voltage: 5 VDC via S7-300 backplane (no external supply required)
- Power Consumption: ≤ 1.2 W
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: -25 °C to +85 °C
- Relative Humidity: 10 % – 95 % (non-condensing)
- Protection Class: IP20
- Mounting: DIN rail (S7-300 rack)
- Dimensions (W × H × D): 40 mm × 125 mm × 120 mm
- Weight: approx. 280 g
- Certifications: CE, UL (pending verification per shipment lot)
- Country of Origin: Germany
- HELMHOLZ Order No.: 700-600-CAN12
Proven Application Environments
- Automotive Manufacturing: Body-in-white welding lines, transfer press synchronization, and robotic cell coordination via CANopen motion profiles (CiA DS-402).
- Material Handling & Intralogistics: Conveyor drive networks, sorter systems, and AGV fleet management where deterministic cycle times are mandatory.
- Packaging Machinery: Multi-axis servo coordination on form-fill-seal and cartoning lines using PDO-based real-time data exchange.
- Building Automation & HVAC: Integration of CANopen-enabled drives, sensors, and actuators into S7-300 supervisory control architectures.
- Renewable Energy: Wind turbine pitch control and solar tracker systems requiring robust, noise-immune fieldbus communication.
- Medical Device Manufacturing: Cleanroom-compatible automation cells where galvanic isolation and CE certification are non-negotiable.
Engineering Advantages
- Dual-Mode Flexibility: Single hardware SKU operates as CANopen Master or Slave — eliminates the need to stock two separate module variants.
- Galvanic Isolation: Protects the S7-300 CPU and backplane from ground loops and transient surges common in industrial CAN networks.
- No External Power Supply: Powered entirely from the S7-300 backplane 5 V rail, simplifying panel wiring and reducing BOM cost.
- STEP 7 & TIA Portal Compatible: Configured via HELMHOLZ GSD/EDS files; integrates natively into existing Siemens engineering workflows.
- High Node Density: Supports up to 127 nodes per network segment — sufficient for large-scale distributed I/O architectures.
- German Engineering Pedigree: Manufactured under ISO 9001-certified processes with full traceability documentation available on request.
System Architecture & Signal Flow
The CAN 300 PRO occupies a standard S7-300 module slot and communicates with the CPU via the internal S7-300 backplane bus. On the field side, the DB9 connector interfaces directly to the CANopen network trunk cable. The module’s internal microcontroller handles all CANopen protocol stack processing — including NMT state machine management, PDO mapping, SDO server/client services, and SYNC/EMCY object handling — offloading the S7-300 CPU from fieldbus overhead. Process image data is exchanged with the CPU via the standard I/O address space, making integration transparent to the PLC application program.
Typical Wiring: CAN_H → Pin 7 (DB9) | CAN_L → Pin 2 (DB9) | GND → Pin 3 (DB9). Terminate the network with 120 Ω resistors at both physical ends of the bus trunk.
Sourcing & Quality Verification
- All HELMHOLZ modules supplied by Konmask.com are sourced through authorized distribution channels with full supply chain traceability.
- Each unit ships with original HELMHOLZ packaging, holographic authenticity label, and factory test certificate.
- Batch-level documentation (date code, firmware version, test report) available upon request for regulated industries.
- Anti-counterfeit verification: serial number cross-referenced against HELMHOLZ factory records prior to dispatch.
Procurement Process
- Lead Time: In-stock units ship within 1–3 business days; ex-works Xiamen, China.
- MOQ: 1 piece (no minimum order quantity restriction).
- Payment Terms: T/T, PayPal, credit card, and trade assurance accepted.
- Export Compliance: HS Code 8537.10 — standard industrial control module; no export license required for most destinations.
- Customs Documentation: Commercial invoice, packing list, certificate of origin (Form A / CO) provided as standard.
- Warranty: 12 months from date of shipment; DOA replacement within 7 days.
Technical FAQ
Q: Is the 700-600-CAN12 compatible with S7-400 or S7-1500?
A: No. The CAN 300 PRO is designed exclusively for the S7-300 backplane bus. For S7-1500 applications, refer to HELMHOLZ’s CP-series or REX 300 gateway products.
Q: Can it operate as both Master and Slave simultaneously?
A: No. The operating mode (Master or Slave) is configured at startup via the GSD/EDS parameterization and cannot be changed dynamically during runtime.
Q: What is the maximum cable length at 1 Mbps?
A: Per CiA DS-301, maximum bus length at 1 Mbps is 25 m. At 125 kbps, the network can extend up to 500 m.
Q: Does the module support CANopen Safety (EN 50325-5)?
A: The standard 700-600-CAN12 does not implement the CANopen Safety protocol layer. For SIL-rated applications, consult HELMHOLZ for safety-certified variants.
Q: Is firmware field-upgradeable?
A: Yes. Firmware updates are applied via the HELMHOLZ firmware update tool over the USB service port (if equipped) or via the backplane using HELMHOLZ’s update utility.
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