- 6 -
ELECTRICAL CONNECTIONS
BASIC INFORMATION
-
It is recommended that the power supply negative pole be grounded.
-
It is possible to supply up to eight 350 ohm load cells or sixteen 700 ohm load cells.
-
For 4-wire load cells, make a jumper between EX- and REF- and between EX+ and REF+.
-
Connect terminal “– SUPPLY” to the RS485 common of the connected instruments in the event
that these receive alternating current input or that they have an optoisolated RS485.
-
In case of an RS485 network with several devices it is recommended to activate the 120 ohm
termination resistance on the two devices located at the ends of the network, as described in
section
RS485 SERIAL CONNECTION.
WIRING DIAGRAM
2 outputs
: controlled by setpoint values or by remote device via protocol.
2 inputs
: settable to have the following functions:
NET/GROSS
WEIGHT
,
SEMI-AUTOMATIC ZERO,
PEAK, PRINT
or
REMOTE CONTROL
(see section
OUTPUTS AND INPUTS CONFIGURATION
).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
1 2 3 4 5 6
EX
C
IT.
-
EXC
IT.
+
SI
G
N
A
L
-
SIGN
AL +
4-WIRE load cell
connection
12-24
VDC
supply
RS485
-
+
SUP
P
LY
+
SUP
P
LY
-
TXD
RXD
OU
T 1
OU
T
2
O
U
T
COMMO
N
IN
1
IN
2
EXCITATION -
REF
./SEN
SE +
IN
C
OM
MON
EXCI
REF./SEN
SE -
SIGNA
L -
SI
G
N
A
L
+
LOAD CELLS
6-WIRE load cell
connection
INPUTS
supply
5-24 VDC
OUTPUTS
max 115 VAC
150 mA
RS232
+
-
