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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
• MODBUS connection diagram
7KHVHGLDJUDPVDUHYDOLGIRU
AHU-xMxSx1
models only.
7KH5602'%86OLQHKDVDORQJPDLQEXVWRZKLFKWKHDSSOLDQFHVDUHFRQQHFWHGGLUHFWO\PD[DSSOLDQFHV
8VHFDEOHVZLWKDEUDLGHGSDLUJURXQGZLUHVKLHOG
8VHWKHEUDLGHGSDLUWRFRQQHFW
A+
and
B-
DQGWKHVLQJOHZLUHIRU
GND
ZKLFKPXVWEHFRQQHFWHGWRHDFKGHYLFH
&RQQHFWWKHVKLHOGWRJURXQGDWDVLQJOHSRLQWSUHIHUDEO\QHDUWKHPDVWHU
7KHFDEOHPXVWEHRIW\SH02'%8656GDWDWUDQVPLVVLRQ
7KHHQGVRIWKHFDEOHPXVWEHFRQQHFWHGZLWKDRKPWHUPLQDWLRQUHVLVWDQFH
7R¿WWKHRKPWRWKHUHJXODWRUVHH
³-XPSHUFRQ¿JXUDWLRQ´SDJH
137
.
7KHPD[LPXPOHQJWKRIWKHEXVGHSHQGVRQWKHEDXGUDWHDQGWKHFDEOHLWVHOI
)RUDEDXGUDWHRIWKHFDEOH$9*W\SHFDQEHXSWRPORQJ
$Q\EUDQFKOLQHVPXVWEHVKRUWDWPRVWPORQJ,I\RXXVHDPXOWLSRUWWDSIRUQEUDQFKHVHDFKEUDQFKFDQEHXSWRP
divided by n.
7RLQFUHDVHWKHQXPEHURIGHYLFHVRQWKHOLQHRULQFUHDVHWKHOHQJWKRIWKHFDEOHV\RXPXVWLQVWDOODVLJQDOUHSHDWHU
Add a signal repeater for every group of 32 appliances connected.
&RQQHFWLRQZLWKRXWUHSHDWHU
GND
A +
B -
Master
GND
B
-
A
+
GND
B -
A +
GN
D
B -
A
+
Slave 1
Slave 2
Slave 31
Max 300m
120Ω
termination
ON
120Ω
termination ON
&RQQHFWLRQZLWKUHSHDWHU
GND
A +
B -
Master
GN
D
B -
A +
GN
D
B
-
A
+
Slave 1
Slave 31
GND
A +
B
-
Repeater
GND
A
+
B
-
Max 300m
0V
24
V
GN
D
B -
A +
Slave 32
Max 300m
120Ω
termination
ON
120Ω
termination ON
120Ω
termination ON
120Ω
termination ON
230 Vac
+
-
+
-
~
~
230 Vac / 24 Vdc
DC
AC
