RS-485 Master Interface Module, 3.3V, Terminal Block Connector



10 days
98 item(s)

Our quantity discounts:

Quantity  5+   10+   25+ 
Price  USD8.51   USD7.94   USD7.45 


Important! Note "Header Type" Option above for selecting pin header! See "Pin Headers" section below for details.
The in485P-M is a RS-485 interface module. It is part of our iMod product range. It enables 3.3V devices (like a Microcontroller for example) to communicate with nodes on a RS-485 network. It has a DIP switch for enabling bias and terminating resistors, that are required for a RS-485 master module (end nodes).

It uses a 1/8 load transceiver chip, enabling 256 nodes on a single bus. It uses the 3.3V Sipex SP3078E RS-485/RS-422 Transceiver chip, which has a 1/8 Load and Failsafe operation. For details on the SP3078, download it's datasheet from

Side View

Bottom View


Schematics (pdf format)

Click to enlarge

The in485P has two rows of standard 2.54mm (0.1") pin headers. The rows are 0.7" apart, allowing this module to be mounted on a breadboard or standard 0.1" grid prototype board. The picture to the right shows some iMod modules mounted on a standard prototyping board.

The pin headers supplied or soldered to this board are selected in the "Header Type" option at the top of this page.



  • DIP switch for enabling bias and terminating resistors
  • ±15kV ESD protection for RS485 pins
  • Advanced receiver-failsafe protection for open, shorted or terminated lines
  • Up to 256 Transceivers may share bus (1/8 Unit Load)
  • Very low load for 8x greater fan-out
  • Hot Swap glitch protection RE and DE
  • High quality, 3.5mm terminal block connector
  • Thermal shutdown protects against driver contention
  • Pin Header connectors are gold plated for best possible contact
  • High quality assembly, with brand name, quality components. No cheap, “no name brand” components are used!
  • Module dimension: 22.2mm x 19.7mm (0.875" x 0.775")
  • RoHS Compliant
  • Operating Temperature -40°C to + 85°C

Pin Headers



  Web PDF Data
in485P Datasheet and Schematics    

What is included

  • 1 x iMod module, fully assembled, with pin headers (as selected in options above).