Instructions

Intesis

KNX – Modbus Master User Manual r1.0 eng

This information is subject to change without notice

URL https://www.intesis.com

11 / 19

4 Connections

Find below information regarding the Intesis connections available.

KNX Port

Connect the KNX TP1 bus to connectors + and - of gateway’s KNX Port. Respect the polarity

Port A / Modbus RTU

Connect the EIA485 bus to connectors A2 (A-), A3 (B+) and A1 (SNGD) of gateway’s Port A. Respect the polarity.

Note for Port A; Remember the characteristics of the standard EIA485 bus: maximum distance of 1200 meters ,

maximum 32 devices connected to the bus, and in each end of the bus it must be a termination resistor of 120 Ω.

The gateway has an internal bus biasing circuit that incorporates the termination resistor. If you install the gateway

in one of the ends of the bus, then do not install an additional termination resistor in that end.