SIEMENS 6GK7342-5DA03-0XE0 — Profibus DP Communications Processor | SIMATIC S7-300 Platform
Engineering Background
The SIMATIC S7-300 series has been a backbone of industrial automation for decades, deployed across automotive assembly lines, chemical processing plants, water treatment facilities, and discrete manufacturing cells worldwide. Within this ecosystem, the CP 342-5 Communications Processor serves as the dedicated Profibus DP gateway, offloading network communication tasks from the CPU and enabling deterministic, high-speed field-bus connectivity to distributed I/O, drives, and intelligent field devices.
Product Positioning
The 6GK7342-5DA03-0XE0 (firmware version V5.0+) is the current-generation CP 342-5 module, replacing earlier -0XB0 and -0XC0 variants. It is the preferred choice for engineers who require a standalone Profibus DP master or slave interface on an S7-300 rack without consuming CPU processing cycles. Its independent communication stack ensures that network faults do not cascade into CPU program execution delays — a critical requirement in safety-adjacent and high-availability applications.
Complete Technical Specifications
| Order Number (MLFB) | 6GK7342-5DA03-0XE0 |
| Product Family | SIMATIC NET CP 342-5 |
| Platform Compatibility | SIMATIC S7-300 (all CPU variants) |
| Communication Standard | Profibus DP (EN 50170 / IEC 61158) |
| Operating Mode | DP Master (Class 1 & 2) / DP Slave |
| Max. DP Slaves (Master Mode) | 125 stations |
| Max. Data per Slave | 244 bytes input / 244 bytes output |
| Profibus Transmission Rate | 9.6 kbps – 12 Mbps (auto-detect) |
| Interface | 1 × DB9 female (RS-485), galvanically isolated |
| Bus Termination | External (via Profibus connector) |
| Configuration Software | STEP 7 V5.x / TIA Portal V13 SP1+ |
| Firmware Version | V5.0 (this order number) |
| Supply Voltage | 5 VDC via S7-300 backplane bus |
| Power Consumption | Typ. 1.1 W |
| Operating Temperature | 0 °C to +60 °C (horizontal mounting) |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 10 % – 95 % (non-condensing) |
| Degree of Protection | IP20 |
| Dimensions (W × H × D) | 40 mm × 125 mm × 120 mm |
| Weight | Approx. 700 g (with packaging) |
| Certifications | CE, UL, cUL, FM, ATEX Zone 2 (with Ex barrier) |
| MTBF | > 500,000 hours (per Siemens SN 29500) |
Proven Application Environments
- Automotive Manufacturing: Body-in-white welding cells with distributed servo drives and I/O clusters connected via Profibus DP at 12 Mbps.
- Chemical & Petrochemical: Hazardous-area installations using Ex-rated Profibus repeaters; CP 342-5 acts as DP master for remote I/O in Zone 2 areas.
- Water & Wastewater Treatment: Multi-pump stations with variable frequency drives (VFDs) controlled via Profibus DP parameter channel (DPV1).
- Food & Beverage: Hygienic filling lines requiring deterministic cycle times; CP 342-5 offloads communication to maintain CPU scan time integrity.
- Power Generation & Utilities: Substation automation with IEDs connected as Profibus DP slaves; CP 342-5 configured as Class 2 master for acyclic diagnostics.
- Machine Tool & Packaging: High-speed pick-and-place systems where 1 ms Profibus cycle times are required alongside S7-300 motion control.
Engineering Advantages
- CPU Offload Architecture: Independent communication processor with dedicated microcontroller — Profibus DP cycles run asynchronously to the S7-300 CPU scan, eliminating communication-induced jitter in the PLC program.
- Dual-Role Flexibility: Configurable as DP Master (Class 1 cyclic I/O + Class 2 acyclic DPV1) or DP Slave within the same rack — supports complex multi-master topologies.
- Galvanic Isolation: RS-485 interface is galvanically isolated from the backplane bus, protecting the CPU from ground loops and transient surges common in industrial environments.
- Diagnostic Transparency: Full DP slave diagnostics readable via STEP 7 / TIA Portal; module status LEDs (BF, SF, ON) provide instant visual fault indication.
- Seamless TIA Portal Integration: Supported from TIA Portal V13 SP1 onward with GSD file import; existing STEP 7 V5.x projects migrate without hardware reconfiguration.
- Long-Term Availability: Siemens extended product lifecycle commitment; spare parts and firmware updates available through 2030+ per Siemens product lifecycle roadmap.
System Architecture & Signal Flow
The CP 342-5 occupies a standard S7-300 slot (slots 4–11) and communicates with the CPU via the S7-300 backplane bus using the SFC/SFB communication function blocks (FC11/FC12 for DP Master, FC13 for DP Slave). The signal flow is as follows:
- CPU Program Layer: User program calls FC11 (DP_SEND) / FC12 (DP_RECV) to exchange I/O data with the CP 342-5 process image.
- CP 342-5 Internal Buffer: The module maintains a local I/O image that is updated independently at the configured Profibus DP bus cycle rate.
- Profibus DP Bus Layer: RS-485 differential signaling at up to 12 Mbps; token-passing protocol ensures deterministic access for all DP masters on the segment.
- Field Device Layer: DP slaves (remote I/O, drives, encoders, valve terminals) exchange cyclic process data and acyclic DPV1 parameter data with the CP 342-5 master.
This decoupled architecture means that a Profibus bus fault (e.g., cable break, slave failure) generates a diagnostic interrupt to the CPU without halting the CPU scan cycle — enabling graceful fault handling in the user program.
Sourcing & Quality Verification
- Origin: Sourced from authorized Siemens distribution channels and verified OEM surplus inventory with full traceability documentation.
- Authenticity Checks: Each unit undergoes visual inspection (holographic label, date code, PCB markings), functional power-on test, and firmware version verification before shipment.
- Packaging: Shipped in original Siemens ESD-protective packaging or equivalent anti-static packaging with desiccant; outer carton labeled with MLFB, serial number, and firmware version.
- Documentation: CE Declaration of Conformity, product datasheet, and test report available upon request.
- Warranty: 12-month warranty against manufacturing defects; DOA replacement within 7 business days.
Procurement Process
- Submit RFQ: Contact us via support@konmask.com or WhatsApp +0086 19859288691 with your required quantity and delivery timeline.
- Quotation: Receive a formal quotation with unit price (HKD/USD), lead time, and shipping options within 4 business hours.
- Order Confirmation: Place order via our secure Shopify checkout or via bank transfer (T/T) for large-volume orders.
- Quality Inspection: Pre-shipment inspection report issued; photos of actual units available on request.
- Shipment: DHL / FedEx / UPS express with full tracking; EXW Xiamen or CIF destination port available.
- After-Sales: Technical support for installation and configuration available via email; STEP 7 / TIA Portal configuration guidance provided free of charge.
Technical FAQ
Q: Is the 6GK7342-5DA03-0XE0 compatible with TIA Portal?
A: Yes. From TIA Portal V13 SP1 onward, the CP 342-5 is supported via GSD file import. Full native support (without GSD) is available in TIA Portal V14+.
Q: Can the CP 342-5 operate as both DP Master and DP Slave simultaneously?
A: No. The operating mode (Master or Slave) is configured in STEP 7 / TIA Portal and is fixed at runtime. However, multiple CP 342-5 modules can be installed in the same S7-300 rack — one configured as master, another as slave.
Q: What is the difference between -0XE0 and earlier variants (-0XB0, -0XC0)?
A: The -0XE0 variant (V5.0 firmware) adds support for DPV1 acyclic services (Class 1 & 2), improved diagnostic handling, and TIA Portal compatibility. Earlier variants are limited to DPV0 cyclic I/O only.
Q: What cable and connector are required?
A: Standard Profibus DP cable (IEC 61158, Type A — violet shielded twisted pair) with DB9 male Profibus connector (e.g., Siemens 6ES7972-0BA52-0XA0). Bus termination resistors must be enabled at both ends of the segment.
Q: Can I use this module in a hazardous area?
A: The CP 342-5 itself is rated IP20 and is not intrinsically safe. For Zone 1/2 installations, use certified Profibus Ex barriers (e.g., Pepperl+Fuchs or R. Stahl) between the CP 342-5 and the hazardous area field devices.
Q: What is the maximum Profibus segment length?
A: At 12 Mbps: 100 m per segment. At 1.5 Mbps: 200 m. At 93.75 kbps: 1200 m. Use Profibus repeaters (e.g., 6ES7972-0AA02-0XA0) to extend beyond one segment.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
