Rice Lake SCT-30 - 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