Walchem WebMaster, Инструкция по эксплуатации

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24
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
- SIGNAL
+ 24
Notes:
The (-) signal wire is the actual 4-20mA
signal and is also the GND return wire
to complete the circuit.
'Input -' is internally connected to GND
via 25 ohm resistor.
A. Two-Wire Loop-Powered Transmitter
B. Two-Wire Externally-Powered Transmitter
C. Three-Wire Transmitter
D. Four-WireTransmitter
POWER+
POWER-
-SIGNAL
+SIGNAL
GND +24
+24V
GND
Notes:
This transmitter gets its power from its own
dedicated power supply.
* Connecting a powered transmitter to the
'Input +' terminal of the WebMaster will
permanently damage the input!
GND +24
+24
-SIGNAL
+SIGNAL
+24
GND
-SIGNAL
+SIGNAL
GND +24
WebMaster 4-20 mA Input Wiring Guide
IN
PU
T
5
-
+
IN
PU
T
5
IN
P
UT
6
INPU
T
7
GN +24
+24V
TB1
+
-
+
-
+
-
+
-
-
+
-
+
-
+
KEY:
(-) minus terminal is the signal input. The 4-20mA signal goes here.
(+) plus terminal is a +24VDC power supply for the transmitters.
GND terminal is the return for completing circuits, both signal and power.
+24 terminal at the top middle of the board is the same supply as the (+) plus terminal.
A.
B.
C.
D.
A
B
C D
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 + Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
E. Non-Isolated Two-Wire Externally-Powered Transmitter
POWER+
POWER-
-SIGNAL
+SIGNAL
GND +24
Notes:
The analog inputs share their negative terminals.
They are all isolated from earth ground but not isolated from each other.
One non-isolated device may be connected without problems.
If more than one non-isolated transmitter is connected, they must be installed with an isolator.
Isolator
OUT- IN-
OUT+ IN+
F. Non-Isolated Four-Wire Externally-Powered Transmitter
+24
GND
-SIGNAL
+SIGNAL
GND +24
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 + Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
Use shielded cable, grounded only at the controller end, for all connections.