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IN485P-M - RS-485 Master Interface Module

Modtronix Engineering
Manufacturer: Modtronix Engineering
Order no.: IN485P-M
incl. VAT plus shipping costs
(Price excluding VAT: 6,09 )
in stock
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The in485P-M is an electronic module with a RS-485 interface, and press-fit connectors. It is part of the Presto iMod product range. It has a DIP switch for enabling bias and terminating resistors, that are required for a RS-485 master module (end nodes). It enables 3.3V devices (like a Microcontroller for example) to communicate with nodes on a RS-485 network. 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 SP3078, dowload it's datasheet from The module has press-fit connectors for easy integration onto a target board, with no soldering required. It can be mounted on a custom board, a prototype board (like Vero Board), or one of our Presto SBC Boards. The in485P-M is part of the Modtronix Presto iMod product range.

The in485P-M has two rows of press-fit connectors on the bottom of the board. They can be pressed into 1.00mm holes on a 1.6mm thick (standard PCB thickness) target board. No special tool is required, they can be inserted by applying firm pressure to the connectors. Once fitted to the target board, the board is very secure, and can not be removed by hand any more. A screwdriver or similar tool can be used to remove the board if required. If the in485P-M is to be soldered onto the target board, 1.10mm holes can be used. This will allow it to be inserted much easier than with 1.00mm holes. When using 1.10mm holes, the board can be removed by hand.


  • 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
  • Thermal shutdown protects against driver contention
  • Press-Fit connectors are gold plated for best possible contact
  • Module dimension: 21.3mm x 19.6mm (0.84" x 0.77")
  • Operating voltage 3.3V
  • Operating Temperature range -20C to +70C
Applicable with the following products
  • SBC83I
  • SBC83IL
  • SBC66UAL
DatasheetDownload PDF-file
Datasheet SP3078E TransceiverDownload PDF-file


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