ModWeigh MW94A - Connection Diagram - MT3; Loadcell Connections

EMC INDUSTRIAL GROUP LTD Connections
MW94A_IM_ALL_SV6.09f_en 15/53
Connection Diagram – MT3
Loadcell Connections
The loadcell(s) may be wired directly to the loadcell terminals or connected together in the field with a
junction box and connected to the ModWeigh unit with a single cable.
When connected to the terminals only a 4-wire connection is used, and digital corner adjustments are
possible. (MT1 only)
When connected with one cable and a junction box no corner adjustments are possible. It is preferable
to use a 6-wire connection as this eliminates voltage drop errors in long cables caused by cable resis-
tance.
BELT SPEED TACHO
+
output
0
V
POWER SUPPLY
+24V
0
V
TOTALISER
input
0V
I1
I2
I3
I4
I5
I6
I7
I8
I9
I10
H1
H2
H3
V1
V2
V3
K1
K2
K3
K4
K5
O1
O2
O3
O4
O5
O6
O7
O8
O9
U1
U2
M1
M2
M3
M4
Digital Inputs
Power/COM2
Digital Outputs
Pulse Output
Analog Outputs
COM3
Analog Input 2
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
24V
0V
24V
0V
+
D
−
D
ADS
OUT1
OUT2
OUT3
OUT4
{MT1}
OUT5
OUT6
OUT7
OUT8
0V
+mAO2
−
mAO2
+mAO1
−
mAO1
+/~ OUT0
−
/~ OUT0
+D
−
D
0V
+VI2
+mAI2
−
AI2
pulse output
running
run motor
healthy
weight fault
paused
flowrate enabled
alarm alert
M
D1,MD2
MR1
L1
L
2
L
3
L
4
L
5
RTS
TXD
0V
0V
RXD
CTS
RJ12
Power/COM2
24V
0V
+
D
−
D
ADS
COM1
TXD
2
3
4
5
6
7
8
2
3
4
6
7
20
RXD
DSR
SG
DTR
CTS
RTS
RXD
TXD
CTS
DSR
SG
DTR
MAC
MAD
DB9F
t
o PC/PLC
MAP
DB25M
t
o
Printer
to
PC, PLC
or
ModWeigh Display
MD1,MD2
weight
flowrate
no function
enable flowrate
run
reset total
print
print total
stop
pause
LOADCELL
(s)
optional sense for 6 wire
connection
Address Select ADS
1
2
3
4
5
24V
0V
+
D
−
D
ADS
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
R
1k
2k2
4k7
10k
22k
47k
100k
4
5
6
7
8
9
10
1
2
3
MT3
P1
P2
P3
P4
P5
P6
E
1
E
2
T1
T2
T3
T4
T5
J1
J2
J
3
J
4
J
5
RTS
TXD
0V
0V
RXD
CTS
RJ1
2
Loadcell 1
Analog Output
Tacho (I/O)
Power/COM2
+EX
−
EX/0V
+
SIG
−
SIG
+
SEN
−
SEN
+AO1
−
AO1
24V
0V
+
D
−
D
ADS
24V
0V
IN0
IN9
OUT9
COM1
enable flowrate
run motor
flowrate
Keep all wiring separated
from mains wiring.
Use shielded cable where
indicated.
Display and transmitter can
alternatively be connected
COM1 to COM1 using an MAC
cable.
MT3 bus address set with
ADS pin or a setting.
MR1 bus address set with
ADS pin and must be same
as MT3.
Fit an MAT terminator to
each end of COM2 cable if
length exceeds 50m.