
Product Description
Quick Procurement Facts
- Part Number: 6ES7341-1CH01-0AE0
- Description: Serial Communication Processor, 1 × RS422/RS485 (up to 19.2 kbps), Modbus RTU Master/Slave, 3964(R), RK512, ASCII
- Condition: Factory New Sealed in Original Siemens Packaging
- Warranty: 24 months (with full baud-rate & protocol test report)
- Dispatch: 24-hour global shipping from EU/US stock
- Interface: Isolated RS422/485 port, 15-pin Sub-D front connector, max 32 nodes
Why 6ES7341-1CH01-0AE0 Is Still Irreplaceable in 2025
- Full galvanic isolation + high noise immunity – perfect for long cables in harsh plants
- Native Modbus RTU Master & Slave in hardware – no extra function blocks needed
- Supports legacy protocols (3964(R), RK512) for old weigh scales, barcode readers, and energy meters
- Over 60,000 units still connecting S7-300 to third-party devices worldwide
Typical Failure Symptoms Driving Immediate Orders
- Serial link down – no response from Modbus slaves
- CP diagnostic buffer: “Framing error” or “Overrun error” after years of 24/7 polling
- Intermittent data corruption on 1 km+ cables
- LED “BF” red + CPU STOP when CP loses bus power
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Siemens SIMATIC S7-300 |
| Order Number | 6ES7341-1CH01-0AE0 |
| Interface | 1 × RS422/485 (half/full duplex) |
| Max Baud Rate | 19.2 kbps (115.2 kbps with reduced distance) |
| Protocols | Modbus RTU Master/Slave, 3964(R), RK512, ASCII, Printer driver |
| Isolation | 500 V DC port-to-backplane |
| Cable Length | Up to 1200 m @ 19.2 kbps |
| Nodes | Max 32 (RS485) |
| Load Memory | Integrated (no MMC required) |
| Power Consumption | 2.5 W from backplane |
| Front Connector | 15-pin Sub-D female |
| Dimensions (W×H×D) | 40 × 125 × 120 mm |
| Weight | 0.28 kg |
| Operating Temp | 0 to +60 °C |
Compatibility & Alternatives
- Direct replacement for: 6ES7341-1CH02-0AE0 (same pin-out)
- Modern successor: CP 1543-1 (Ethernet-based) or CM PtP RS422/485 (ET 200SP)
- Cross: Moxa MGate MB3170, HMS Anybus Communicator