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2.3.
850 connection diagrams
2.3.1.
General diagram
NO
+
OUT 2
-
(AL1)
C
NO
+
~
OUT 3
~
-
(AL2)
C
Without Ethernet communication option
B (Data +)
A (Data -)
COM
IN 3
IN 2
IN 1
CT1 = current transformer
CT2 = second current transformer for 2-phase /3-phase load
With Ethernet communication option
B (Data +)
RS485 Bridge
A (Data -)
COM
IN 3
IN 2
IN 1
CT1 = current transformer
CT2 = second current transformer for 2-phase /3-phase load
LEGEND
~
Power supply
PWR
~
+
Linear input
voltage / current
-
Input for
current transformer
OUT 2
19
18
OUT 3
20
17
OUT 4
21
16
COM
22
15
~
23
14
PWR
~
24
13
18
7
+
A1
-
17
8
-
OUT 4
(AL3 / HB)
+
16
9
15
10
CT1
14
11
CT2
13
12
18
7
17
8
OUT 4
(AL3 / HB)
+
16
9
15
10
CT1
14
11
CT2
13
12
Isolated digital
inputs
+
Thermocouple
input
-
Input
PT100
T
T
JPT100
2 / 3 wires
80209C_MHW_850-1650-1850_20-2020_ENG_pag. 25
NO
7
6
+
-
8
5
C
9
4
10
3
+
11
2
12
1
-
+
T
T
-
Auxiliary input
for models with the auxiliary input option
= 1
NO
Relay output
C
~
Long-life solid state
~
relay output
+
Logic output
-
Isolated logic output
+
Isolated analog output
-
+
B (Data+)
A G
OUT 1
-
A (Data-)
5 V, 10 V
+
T
T
60 mV, 1 V, 20 mA
-
Main input
+
+
60mV
VP
VT2
+
+
1 V, 5 V, 10 V, 20 mA
-
-
-
= 2 o 3
B (Data +)
RS485 serial line
A (Data -)
+
VT
Supply transmitter
-
+
Supply potentiometer
VP
-
+
+
VT1
-
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