Resources:
Wiki: www.waveshare.com/wiki/TTL_TO_RS232_(B)
Galvanically Isolated TTL to RS232 Converter with Surge Protection and DIN-Rail Mounting
The Waveshare TTL TO RS232 (B) is an industrial rail-mount serial converter designed to convert TTL-level serial signals into standard RS232 signals for reliable point-to-point communication. It supports 3.3V to 5V TTL logic and full-duplex communication, making it suitable for connecting microcontrollers, embedded systems, industrial controllers, and peripheral devices to RS232 equipment.
The converter integrates galvanic power-supply isolation and digital signal isolation to electrically separate the TTL and RS232 sides, improving noise immunity and reliability in electrically demanding environments. Protection circuitry includes a TVS suppressor, surge and ESD protection, protection diodes, reverse-polarity protection, and over-voltage protection. The isolated side does not require a separate external power supply because the onboard isolated power circuit provides the required isolated voltage. Screw-terminal connections, status LEDs, and a compact ABS enclosure compatible with 35 mm DIN rails simplify installation in industrial control cabinets and automation systems.
Key Features
- Converts TTL serial signals to RS232 signals
- Supports full-duplex point-to-point communication
- Compatible with 3.3V to 5V TTL signal levels
- 3.3V to 5V DC power input
- Integrated galvanic power-supply isolation
- Integrated digital signal isolation
- Isolated terminal requires no additional external power supply
- TVS transient-voltage suppression
- Surge protection for RS232 interface
- ESD protection
- Reverse-polarity protection on power input
- Over-voltage protection on power input
- Protection diodes for current and voltage protection
- RS232 transmission distance of approximately 15 m
- TTL transmission distance of approximately 10 m
- Stable communication tested up to 1 Mbps baud rate
- PWR, TXD, and RXD status indicators
- Screw-terminal connections on TTL and RS232 sides
- Industrial ABS enclosure
- Compatible with 35 mm DIN-rail mounting
- Suitable for industrial automation and embedded serial communication
Primary Function
for converting the TTL signal into an RS232 signal and
expanding communication distance
Rail-Mount Support
Easy To Combine Multi Rail-Mounted Serial Server, More Freely
Multiple Protection, Safe And Stable
Onboard power and signal isolation ensures a stable, isolated voltage, excellent dependability, and powerful anti-interference. Onboard ESD protection and TVS (Transient Voltage Suppressor) effectively reduce surge and transient spike voltage in the circuit, while also being lightning-proof and anti-electrostatic. Onboard safety diodes provide current/voltage stability, provide over-current/over-voltage protection, and increase shockproof performance.
Interface
Communication Connection Diagram
TTL to RS232 converter, point-to-point, full-duplex communication, suitable for interface conversion
Two groups: TTL to RS232 conversion, point-to-point, full-duplex communication, suitable for extending the communication distance of TTL
Application Examples
The TTL To RS232 (B) interface is commonly used for point-to-point communication networks between two hosts or between a host and an MCU/Peripheral. It can also be utilized in applications that require TTL-to-RS232 conversion, such as industrial automation and the Internet of Things.
Dimensions
Package Includes:
- TTL To RS232 (B) x1
- Screwdriver x1
