Schneider Electric ACECFR20101SE User Manual

Building Management System

The Modbus interface allows the EcoBreeze System to communicate with a building 
management system (BMS). 

The Modbus connection is available in two locations on the Modbus hub:

•  RJ-45 In port
•  3-wire on terminal block

For an RJ-45 connection, wire as follows: 

For a direct 3-wire connection, connect to the corresponding contacts on the green terminal 
block on the side of the Modbus hub. No connection is necessary to the 0V contact.

Pin 4

D(A)

Pin 5

D(B)

Pin 8

Ground

1MOD

1MOD

na3660a

WIRING CONTACTS 

FOR DIRECT 3-WIRE 

CONNECTION

RJ-45 IN PORT

DDC PANEL 

ENCLOSURE