TTL TO RS485 (B)
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Overview
TTL TO RS485 (B) is an industrial-grade rail-mounted electrically isolated TTL-to-RS485 serial converter.
Feature
- Compatible with TTL/RS422 standard, converting the TTL signal into a balanced differential RS422 signal, supporting half-duplex communication
- Compatible with 3.3V ~ 5V TTL signal level, with anti-reverse connection and anti-over-voltage circuit on the power supply side
- Onboard unibody power supply isolation, provides stable isolated voltage and needs no extra power supply for the isolated terminal
- Onboard unibody digital isolation, allows signal isolation, high reliability, strong anti-interference, and low power consumption
- Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, and anti-electrostatic
- Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provide over-current/over-voltage protection, improve shock resistance
- On-board RS485 input and output 120R resistors with built-in jumper caps for switching enable
- Industrial rail-mount ABS case design, small in size, easy to install, and cost-effective
Parameters
Model | Galvanic isolated TTL To RS485 converter | |
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Power Port | Power supply | 3.3V ~ 5V |
Interface Protection | anti-over-discharge, reverse-proof | |
Device interface | Compatible with TTL / RS422 standard | |
TTL Interface | Interface type | Screw terminal |
Transmission distance | About 10m | |
Transmission model | Point to point | |
RS422 Interface | Interface type | Screw terminal |
Interface Protection | Provide 600W lightningproof, surge-suppress and 15KV ESD protection | |
Terminal Resistance | 120R, enabled/disabled via switch | |
Transmission Distance | About 1200m | |
Transmission Mode | point-to-multipoint (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more) | |
Product Appearance | Case | Rail-mount ABS case, suitable for 35mm DIN rail |
Dimensions | 91.6 × 58.7 × 23.3mm |
Primary Function
Convert the TTL signal into a balanced differential RS485 signal, which can be used for interface conversion and node expansion, and can also be used to extend the communication distance.
Interface Introduction
Communication Connection Diagram
TTL convert to RS485, point to point, half-duplex communication, suitable for interface conversion
TTL convert to RS485, point-to-multipoint, half-duplex communication, suitable for expanding nodes
Two groups TTL To RS485 conversion, point-to-point, half-duplex communication, suitable for extending the communication distance of TTL
Dimensions
Hardware Test
Test Note
Test Environment: PC (Windows).
Accessories required for testing:
- TTL TO RS485 (B) —— This product
- USB TO TTL - not included
- USB TO RS485 - not included
Test Hardware Connection
The RS422 interface of TTL TO RS485 (B) is connected to the PC through the USB to RS422 conversion cable. The TTL interface of TTL TO RS485 (B) is connected with the TTL of USB TO TTL. The USB port of USB TO TTL is connected to the same PC for the self-receiving test. The schematic diagram of the hardware connection is as follows:
Note: The RS485 interface of this product is also equipped with 120R Switch, the default is on, the user can set it according to the needs (set up to open, set down to NC), if signal isolation is required, you can set GND is also connected to ground.
On the PC, open two SSCOM serial port debugging assistants, open the corresponding port number, set the same baud rate, and click Send at regular intervals to send and receive normally. The screenshot of the software test is as follows:
Resource
Software
Support
Technical Support
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