Product Introduction
In industrial automation, reliable serial communication is critical for coordinating controllers and peripherals. The Siemens 6ES7340-1BH00-0AE0 CP 340 Communication Processor provides a dedicated 20 mA (TTY) interface for the SIMATIC S7-300 system. This module enables point-to-point links with printers, terminals, and other serial devices, supporting both 3964(R) and ASCII protocols. It includes a configuration package on CD for easy setup.
Technical Specifications Breakdown
The Siemens 6ES7340-1BH00-0AE0 offers key specifications that ensure robust performance:
| Parameter |
Value |
| Input current from backplane bus (5 V DC) |
Max. 220 mA |
| Power loss |
Max. 0.85 W |
| Number of interfaces |
1 (isolated) |
| Interface physics |
20 mA (TTY) |
| Transmission rate (min.) |
2.4 kbit/s |
| Transmission rate (max.) |
9.6 kbit/s |
| Cable length (point-to-point) |
1000 m (100 m active, 1000 m passive) |
| Telegram length (3964(R) / ASCII) |
1024 byte (max.) |
| FB length in RAM |
2700 byte (max.) |
| Dimensions (W x H x D) |
40 mm x 125 mm x 120 mm |
| Weight |
Approx. 300 g |
The low power draw and isolated interface minimize electrical interference, making the Siemens 6ES7340-1BH00-0AE0 a reliable choice for long-distance serial communication up to 1 km.
Industry Applications
The Siemens 6ES7340-1BH00-0AE0 excels in environments requiring stable point-to-point links. Common applications include connecting to HP Deskjet or Laserjet printers for report generation, interfacing with barcode scanners or weigh scales via ASCII protocol, and linking to older PLCs or terminals using 3964(R) protocol. Its support for user-defined printers adds flexibility in custom automation systems.
Installation & Setup Guidance
Install the Siemens 6ES7340-1BH00-0AE0 in any available slot of the S7-300 rack. Use the included configuration CD to set protocol parameters such as baud rate, telegram length, and printer type. For TTY wiring, ensure proper termination and polarity. Active repeaters can extend the cable length beyond 100 m when needed.
Maintenance & Reliability
Regularly inspect TTY cable connections for corrosion or loose terminals. The isolated interface of the Siemens 6ES7340-1BH00-0AE0 protects against ground loops, reducing downtime. With a power loss of only 0.85 W, the module generates minimal heat, contributing to long service life. Monitor communication logs for errors to preemptively address cable or configuration issues.
Selection Guide & Purchasing Advice
Before purchasing, verify compatibility with your S7-300 CPU model and confirm that the required protocol (3964(R) or ASCII) is supported. For long cable runs, plan for active repeaters if distances exceed 100 m. For a reliable supply, visit ubest101 or order directly from PLC Source PRO. The Siemens 6ES7340-1BH00-0AE0 is a proven solution for dependable serial communication in industrial automation.