25
A. Two-Wire Loop-Powered Transmitter
-SIGNAL
+24
- PLC +
Notes:
The (-) signal 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.
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
ADDING AN ISOLATED RECEIVER TO THE LOOP (PLC, CHART RECORDER, ETC)
The WebMaster GND must always be at the bottom of the loop.
Maximum total loop resistance 1000 ohms.
B. Two-Wire Externally-Powered Transmitter
POWER+
POWER-
-SIGNAL
+SIGNAL
GND +24
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!
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
- PLC +
+24V
GND
C. Three-Wire Transmitter
+24
-SIGNAL
+SIGNAL
GND +24
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
- PLC +
D. Four-Wire Transmitter
+24
GND
-SIGNAL
+SIGNAL
GND +24
Input 1 -
Input 1 +
Input 2 -
Input 2 +
Input 3 -
Input 3 +
Input 4 -
Input 4 +
- PLC +
