Compatible with TTL/RS485 standard, converting the TTL signal into differential RS485 signal, support half-duplex communication
Compatible with 3.3V ~ 5V TTL signal level, provides anti-reverse and over-voltage protection for power supply interface
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, low power consumption
Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic
Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provide over-current/over-voltage protection, improve shock proof performance
Onboard RS485 output terminal 120R resistor, enabled/disabled via switch
Industrial rail-mount ABS case design, small in size, easy to install, and cost-effective
Technical Specifications
Product Type
Galvanic isolated TTL To RS485 converter
Power supply interface
Power supply
3.3V ~ 5V
Protection
over-voltage, reverse-proof
Device Port
TTL/RS485 standard compatible
TTL
Connector
screw terminal
Transmission distance
about 10m
Transmission mode
point-to-point
RS485
Connector
screw terminal
Protection
600W lightningproof and surge-suppress, 15KV ESD protection
Terminal resistor
120R, enabled/disabled via switch
Transmission Distance
About 1.2km
Transmission Mode
point-to-multipoint (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more)
Appearance
Case
Rail-mount ABS case, suitable for 35mm DIN rail
Dimensions
91.6 × 58.7 × 23.3mm
Primary function
Converting the TTL signal into balanced differential RS485 signal for interface converting, expanding nodes and long-distance communication
Rail-Mount Support
Easy To Combine Multi Rail-Mounted Serial Server Together, More Freely
Multiple Protection, Safe And Stable
Onboard power and signal isolation, provide stable isolated voltage, high reliability and strong anti-interference. Onboard Lightningproof Diodes and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic. Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage protection, improves shock proof performance
Interface Introduction
TOP SIDE SCREW TERMINAL
BOTTOM SIDE SCREW TERMINAL
VCC
Power Input DC 3.3V~5V power supply
DIP SWITCH
120R enable switch
GND
Ground
SGND
RS485 signal ground
TXD
TTL transmit data pin
A+
RS485 differential signal positive
RXD
TTL receive data pin
B-
RS485 differential signal negative
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
Application Example
The TTL To RS485 (B) can be widely used for point-to-point, point-to-multipoint, long distance cascaded communication network between two hosts, or between host and MCU/Peripheral. It also can be used in the application scenarios that require TTL To RS485 conversion such as Industrial Automation and IoT.
