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M800VW/M80VW Series Connection and Setup Manual
11 Connection of Remote I/O Unit
11.11 Connecting with Multi-analog Input Signal (FCU8-DX409)
Connecting with the thermocouple input signal
Thermocouple
Shield
FG
Cold junction compensation resistor
Thermocouple
Shield
FG
Cold junction compensation resistor
Thermocouple
Shield
FG
Cold junction compensation resistor
Thermocouple
Shield
FG
Cold junction compensation resistor
Stabilized power supply
24VDC(+)
0V
FG
Connect the shield to FG pin of AI connector. Ground the thermocouple tip side, too.
Do not connect or disconnect the cables between units while the power is ON.
Keep the lead length of cold junction compensation resistors as short as possible. (2 cm or shorter as a guide)
FCU8-DX409
AI
3
5
1
FG
4
(Pt100)
6
7
9
12
FG
8
(Pt100)
10
15
17
13
FG
16
(Pt100)
18
19
21
24
FG
20
(Pt100)
22
DCIN
1
2
3
Cold junction
compensation
V+
resistor
V-
(Pt100)
CH1
CJ+
CJ-
Set the lead length 2cm or
shorter including the length to
insert to AI connector. (As a guide)
V+
V-
CH2
CJ+
CJ-
V+
V-
CH3
CJ+
CJ-
V+
V-
CH4
CJ+
CJ-
+24V
0V
FG
327
AI
CJ+
CJ-
2cm or shorter
IB-1501612-C
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