PLR is the established Wilo protocol for the communication with pumps. It is based on a point-to-point connection and can do without addressing.

Many existing link-ups connections to building automation are based on this technology.PLR is a classic point-to-point connection between pump and pump master computer (PumpenLeitRechner = PLR). A physical interface is needed for every pump. The Wilo specific protocol is easy, it is based on the current loop principle and allows a transmission over long distances.For the interconnection of several pumps via a RS485 interface, Wilo offers the DigiCon interface converter.

IF-Module Stratos PLR
- Stratos/Stratos-D/Stratos-Z series
This module also includes the interface for the dual-pump management.

Download:
Operating manual: IF-Modul Stratos PLR (PDF 940KB)

IF-Module PLR
- IP-E/DP-E series
- IL-E/DL-E series

Download:
Operating manual: IF-Modul PLR (PDF 677KB)

Wilo-DigiCon interface converter
The Wilo-DigiCon interface converter converts the PLR protocol into the well-established and commonly used RS485 interface. All Wilo pumps with PLR interface become thus BUS-capable. Up to 4 pumps can be connected to one interface converter.

Download:
Operating manual: Wilo-DigiCon interface converter (PDF 2MB)
Protocol description: Wilo-DigiCon interface converter (PDF 1,3MB)