3 electrical connections, Sct-30 – Rice Lake SCT-30 User Manual
Page 10
6
SCT-30 Weight Transmitter Manual
1.3
Electrical Connections
• It is recommended that the negative side of the power supply be grounded.
• It is possible to power up to eight 350 ohm or sixteen 700 ohm load cells.
• Connect terminal “0 VDC” to the RS-485 common of the connected instruments
in the event that these receive alternating current input or that they have an opto-
isolated RS-485.
Figure 1-2. Wiring Diagram
SCT-30
13
1 2 3 4 5 6 7 8 9
11 12
10
14 15 16
LOAD CELLS IN PARALLEL(1-16 terminals)
+ EX
-
EX
-
SIG
+ SIG
+ EX
-
EX
-
SIG
+ SIG
+ EX
-
EX
-
SIG
+ SIG
MODE
FILTER
DIP-SW
MODIFY
and
CONFIRM
23
22
20
18 19
21
17
+12-24
POWER
VDC
0
V
mA COM -
+
RS485
-
+
ZERO
NORMAL
FS CAL
1 2 3
ON
1
3
2
ON
YELLOW
GREEN
RED
EXCITATION -
EXCITATION +
SIGNAL -
SIGNAL +
EXCITATION -
EXCITATION +
SIGNAL -
SIGNAL +
EXCITATION -
EXCITATION +
SIGNAL -
SIGNAL +
EXCITATION -
EXCITATION +
SIGNAL -
SIGNAL +
Current output: max load 400 ohm
Voltage output: min load 2 kohm
+
+ +
+
-
- -
RS485
ANALOG
OUTPUT
12/24 Vdc
SUPPLY
+ SUPPLY
- SUPPLY
1
22
3
1: Selector switch
2: Knob control
3: DIP switch