MAX3485 MAX485 Module Development Board TTL to RS485 Module MCU Development Accessories Overvoltage Protection – KSH 400 at HIMA TRONICS Mombasa – Top quality modules. Best electronics in Kenya. Shop now for Arduino, ESP32, sensors and IoT devices.
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MAX3485 MAX485 Module Development Board TTL to RS485 Module MCU Development Accessories Overvoltage Protection

SKU: HMJ791 Category: Modules
KSH 400.00
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Product Description

MAX3485 TTL to RS485 Module Development Board

= Overvoltage Protected Serial Communication Converter =

The MAX3485 module enables bidirectional TTL to RS485 signal conversion for MCU development, featuring builtin overvoltage protection for reliable longdistance communication.

Robust RS485 Communication - Up to 12Mbps data rate
Enhanced Protection - Overvoltage and ±15kV ESD protection
Operating voltage is 3.3V only - not 5V tolerant
Connect RE and DE pins together for simple half-duplex control
Use level shifter if connecting to 5V logic systems

= Technical Specifications =

ParameterValue
ChipMAX3485 industrial grade
Supply Voltage3.3V
Data RateUp to 12Mbps
CommunicationHalf-duplex
ESD Protection±15kV HBM
DistanceUp to 1km
Temperature Range-40°C to +85°C
Nodes Supported256 devices

= Key Features =

Overvoltage Protection - Safeguards RS485 lines

ESD Protected - ±15kV on I/O pins

Low Power - 3.3V operation with shutdown mode

Signal Indicators - TX/RX status LEDs

Termination Resistor - 120Ω jumper for long lines

== Applications ==

  1. Industrial automation networks
  2. Long-distance sensor communication
  3. Arduino and ESP32 interfaces
  4. SCADA and control systems
  5. Building automation and HVAC
Reliable Industrial Grade - Used in demanding environments
Easy Integration - Standard pinout with screw terminals

√ 120Ω termination resistor onboard

√ Power and signal indicator LEDs

√ Compatible with Arduino, ESP32, STM32

= Pin Connections =

PinFunctionDescription
VCCPower3.3V input
GNDGroundPower return
RORX OutputTTL receive to MCU
DITX InputTTL transmit from MCU
DE/REEnableHigh=TX, Low=RX (tie together)
A/BRS485Differential lines
Tie DE and RE together for simple half-duplex control
Use twisted-pair cable for long distances
Do not connect to 5V power - chip damage risk
Add termination resistor only at line ends

= Troubleshooting =

No communication:

  • Verify 3.3V power supply
  • Check DE/RE pin control
  • Avoid 5V logic connection

Short range:

  • Enable 120Ω termination
  • Use twisted-pair cable
  • Avoid electrical interference