Serial Communication Solution — SIEMENS 6ES7341-1CH02-0AE0 | CP341 Series
Where This Product Is Used
The SIEMENS CP341 (6ES7341-1CH02-0AE0) is a dedicated serial communications processor for the S7-300 PLC platform, engineered for industrial environments that demand reliable, high-speed RS422/RS485 data exchange. Typical deployment scenarios include:
- Process Manufacturing: Chemical plants and refineries connecting field instruments, flow computers, and analyzers to the S7-300 controller via Modbus RTU or 3964(R) protocol.
- Water & Wastewater Treatment: SCADA-integrated pump stations and filtration systems requiring multi-drop RS485 networks across long cable runs.
- Automotive Assembly Lines: Torque tool controllers, barcode scanners, and vision systems communicating with the PLC over point-to-point RS422 links.
- Power Generation & Utilities: Substation RTUs and energy meters polled by the S7-300 using IEC 60870 or proprietary serial protocols.
- Building Automation & HVAC: BACnet MS/TP or Modbus-based HVAC controllers integrated into plant-wide PLC architectures.
- Printing & Packaging Machinery: High-speed register control and tension feedback loops demanding deterministic serial communication with minimal latency.
- Food & Beverage Processing: Hygienic-area weighing systems, filling machines, and conveyor drives linked to the S7-300 in wash-down environments.
Technical Specifications
| Order Number | 6ES7341-1CH02-0AE0 |
| Product Family | SIMATIC S7-300 CP341 |
| Interface | RS422 / RS485 (selectable) |
| Supported Protocols | ASCII, 3964(R), Modbus RTU/ASCII (Master/Slave), RK512 |
| Baud Rate | 300 bps – 76.8 kbps |
| Data Bits | 7 or 8 |
| Parity | None / Even / Odd |
| Stop Bits | 1 or 2 |
| Max. Cable Length (RS485) | 1,200 m (at 9,600 bps) |
| Isolation | Electrically isolated from backplane bus |
| Power Supply | Via S7-300 backplane (5 VDC) |
| Current Consumption | 160 mA (5 VDC) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | −40 °C to +70 °C |
| Relative Humidity | 10 % – 95 % (non-condensing) |
| Dimensions (W × H × D) | 40 mm × 125 mm × 120 mm |
| Weight | 240 g |
| Mounting | S7-300 DIN rail profile rack |
| Configuration Tool | STEP 7 / TIA Portal (via GSD/HSP) |
| Firmware Loadable | Yes (via STEP 7) |
Why Engineers Specify This Model
- Offloads CPU Communication Tasks: The CP341 handles serial protocol processing independently, freeing the S7-300 CPU for real-time control logic without communication overhead.
- Dual-Mode RS422/RS485: A single module covers both point-to-point (RS422) and multi-drop bus (RS485) topologies, reducing spare-parts inventory.
- Modbus Master & Slave in One: Supports both Modbus RTU master polling and slave response modes — critical for mixed-topology installations.
- Electrically Isolated Interface: Galvanic isolation protects the S7-300 backplane from ground loops and transient surges common in industrial field wiring.
- Loadable Protocol Firmware: Protocol drivers (Modbus, 3964R, ASCII) are loaded via STEP 7, allowing field reconfiguration without hardware replacement.
- Proven Long-Term Availability: The CP341 platform has been in production for over two decades, with Siemens maintaining spare-part availability for installed base support.
- Deterministic Cycle Time: Fixed interrupt-driven communication ensures predictable data exchange timing, essential for closed-loop process control.
Complete System Bill of Materials
A typical S7-300 serial communication node using the CP341 requires the following components:
- S7-300 CPU (e.g., CPU 314C-2 DP — 6ES7314-6CH04-0AB0)
- S7-300 Rack (e.g., UR2 — 6ES7390-1AB60-0AA0)
- PS307 Power Supply (e.g., 6ES7307-1EA01-0AA0, 5 A)
- CP341 RS422/485 — 6ES7341-1CH02-0AE0 (this module)
- RS485 Repeater if bus length > 1,200 m (e.g., 6ES7972-0AA02-0XA0)
- PROFIBUS/MPI Programming Cable for STEP 7 configuration
- Shielded twisted-pair cable (Belden 3105A or equivalent) for RS485 field wiring
- Terminal resistors (120 Ω) at both ends of RS485 bus
Compliance & Industry Standards
- CE Marking: Compliant with EU Low Voltage Directive and EMC Directive
- UL / cUL Listed: UL 508 (Industrial Control Equipment)
- IEC 61131-2: Programmable Controllers — Equipment Requirements and Tests
- ATEX / IECEx: Suitable for use in Zone 2 hazardous areas when installed in certified enclosures
- RoHS Compliant: Restriction of Hazardous Substances Directive 2011/65/EU
- REACH: Compliant with EU REACH regulation (EC) No 1907/2006
- ESD Protection: IEC 61000-4-2 Level 3
- Surge Immunity: IEC 61000-4-5
Quality Assurance & Sourcing
At Konmask.com, every SIEMENS module is subject to a multi-stage verification process before dispatch:
- Authenticity Verification: Each unit is cross-referenced against Siemens’ official order number database and inspected for genuine labeling, holographic seals, and PCB markings.
- Functional Pre-Test: Modules are powered up and communication ports are verified using protocol analyzers prior to packaging.
- Condition Grading: Stock is clearly graded as New (factory-sealed), Refurbished (tested & restored), or Surplus (tested, cosmetic wear). Grade is stated on every order confirmation.
- ESD-Safe Packaging: All modules ship in anti-static bags with foam cushioning inside double-wall corrugated cartons.
- Traceability: Batch records and inspection reports are retained for 5 years and available upon request for regulated industries.
How to Source This Part
- Add to Cart directly on this page for in-stock units with same-day dispatch (orders placed before 15:00 CST).
- Request a Quote for volume orders (>5 units), project BOM pricing, or consignment stock arrangements — email support@konmask.com.
- Urgent / Emergency Orders: Call or WhatsApp +0086 19859288691 for same-day air freight options to minimize plant downtime.
- Lead Time Confirmation: For non-stock items, lead time is confirmed within 2 business hours of inquiry.
- Export Documentation: Commercial invoice, packing list, and certificate of origin provided for all international shipments. HS Code: 8537.10.
Application-Specific FAQ
- Q: Can the CP341 run Modbus TCP instead of Modbus RTU?
- A: No. The 6ES7341-1CH02-0AE0 is a serial (RS422/RS485) module and supports Modbus RTU/ASCII only. For Modbus TCP over Ethernet, specify the CP343-1 (6GK7343-1EX30-0XE0) instead.
- Q: Is this module compatible with TIA Portal?
- A: The CP341 is natively configured in STEP 7 Classic. TIA Portal support requires installation of the CP341 HSP (Hardware Support Package) from the Siemens Support Portal. Full TIA Portal integration is available from HSP version 2.0 onward.
- Q: How many CP341 modules can be installed in one S7-300 rack?
- A: Up to 8 CP modules can be installed in a single S7-300 rack (slots 4–11), subject to the CPU’s maximum module count and backplane current budget.
- Q: What is the maximum RS485 bus length?
- A: 1,200 m at 9,600 bps using shielded twisted-pair cable. For longer runs, use an RS485 repeater (6ES7972-0AA02-0XA0) to extend the bus.
- Q: Can I use this module as a Modbus slave to connect to a SCADA system?
- A: Yes. The CP341 supports both Modbus RTU Master and Slave modes. Load the Modbus Slave firmware via STEP 7 and configure the slave address and register mapping in the function block parameters.
- Q: Is the 6ES7341-1CH02-0AE0 still in production?
- A: Siemens has transitioned this product to “not recommended for new designs” (NRND) status. However, it remains available as a spare part for installed base maintenance. Konmask.com maintains stock specifically to support legacy S7-300 installations.
- Q: What warranty does Konmask.com provide?
- A: All units carry a 12-month functional warranty from date of dispatch. Warranty covers failure under normal operating conditions and excludes physical damage or misapplication.
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Contact: support@konmask.com | +0086 19859288691
