EMC INDUSTRIAL GROUP LTD
Connections
MW61A_IM_ALL_SV6.09d_en
12/47
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
0V
POWER SUPPLY
+24V
0V
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
limit 1 output
limit 2 output
motion
healthy
net mode
at zero
weight fault
alarm alert
MD1,MD2
MR1
L1
L2
L3
L4
L5
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
to PC/PLC
MAP
DB25M
to Printer
to
PC, PLC
or
ModWeigh Display
MD1,MD2
gross weight
weight
acquire zero
acquire tare
capture weight
print total
reset total
totalise
hold flowrate
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
E1
E2
T1
T2
T3
T4
T5
J1
J2
J3
J4
J5
RTS
TXD
0V
0V
RXD
CTS
RJ12
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
acquire zero
limit 2 output
weight
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.