Advertisement
B
A
C
D
Modbus address rotary switch for selecting
sensors ( on the sensor's PCB)
2
4
3
Modbus connection to the occupancy sensor
TF6582_A_NOT_INST_PRE_SENSOR_MODBUS
6. THE S-PRE/DAY-NIGHT/T SENSOR'S CONNECTIONS WITH
THIRD PARTY MODBUS SYSTEM
6.1. SETTINGS OF THE S-PRE/DAY-NIGHT/T SENSOR FOR THIRD PARTY
MODBUS SYSTEM
15 indexation positions are allowed for Modbus addressing: position 1 to position F included.
E
Address 0 is the broadcast address, this address is then forbidden.
F
Important: Several sensors up to 15 can be connected to the bus in daisy-chain. Every
0
sensor must have a specific Modbus address (1...F). This Modbus address has to be
different from a sensor to another one.
Note: the sensors are delivered in position 0. They must be manipulated with extreme care.
5
6.2. THE S-PRE/DAY-NIGHT/T SENSOR'S ELECTRICAL CONNECTIONS WITH
THIRD PARTY MODBUS SYSTEM
Disconnect the electrical power supply before any operations. The S-PRE/DAY-NIGHT/T communicates
with other components through Modbus connection which is made by a RS485 interface connected
through a double RJ45 connector for daisy chain linking.
All the components are linked to each other via a daisy-chain whose length should not exceed 200 m
with shielded CAT5E cable or better. At the beginning and at the end of the daisy-chain, a termination
is needed. An electrical control board that contains a converter USB -> RS485 and a BUS polariza-
tion is necessary for the Modbus connection schemes. Aereco offers an optimal solution of electrical
control board (ref: ADX1785EX) that is adapted to its prsence Modbus sensors
2W-Modbus on RJ45 socket pin-out
6 / 10
Aereco S.A.
Advertisement
