Operating instructions, Quick installation
8
Power supply
Terminals 17, 18.
The transmitter is powered by 24 V DC.
Rail mounted power supplies can be ordered
from Vishay Nobel.
Analogue output
Terminals 24, 25.
The measurement value is presented at the analogue
output as a current or voltage signal, according to
the choice in the set-up.
Connect the cable shield to ground, preferably to
a ground terminal at the mounting rail.
Digital inputs
Terminal 15, 16.
Connection of +24 VDC to the digital inputs causes
Taring and Gross/Net switching respectively.
Connect the cable shield to ground, preferably
to a ground terminal on the mounting rail.
Serial communication
Terminals 19 – 23.
The transmitter has a serial port for RS-485 on
2-wires or 4-wires with common earth (COM).
If necessary, a converter unit can be connected
to adapt the interfaces.
The line must have 120 ohm terminating resistors
at both ends. At WST 3 they should be mounted
on separate terminals and connected according
to the diagrams. Refer to manufacturer instructions
for termination at the control unit (PC), or at a
possible converter unit.
Connect the cable shield to ground, preferably
to a ground terminal at the mounting rail.
Set-up programme deltaCOM
Transmitter WST 3 should be connected to transducer(s) and power supply. Then it is
possible to perform a set-up from the front panel or from a connected PC with
Windows 95/98/2000/XP/NT4.0. A diskette with the set-up programme deltaCOM is
included in the WST 3 delivery. This diskette also contains instructions for connection
and set-up of the serial communication between the transmitter and the PC.
Through deltaCOM it is possible to find all modules communicating with the PC,
and to study and edit all set-up parameters for these modules.
17
+
-
18
+24 V DC
0 V (24)
24V
+
OUT+
OUT–
24
25
15
IN1
16
Taring
Gross/Net
IN2
24 V
+
terminal 18
2-wire
*
Terminating resistor on separate
terminals at the last unit on the line.
120Ω
19
20
21
22
23
TXD–
TXD+
RXD–
RXD+
COM.
4-wire
Terminating resistor on separate
terminals at the last unit on the line.
*
*
19
20
21
22
23
TXD–
TXD+
RXD–
RXD+
COM.
120Ω
*
120Ω
*
