Chapter 3
– Field Wiring
22
FCM II Installation Guide: 20160419 - Part # 2307
3.2.4
RTD
T
EMPERATURE
P
ROBE
W
IRING
White
4-Wire
100 Ohm Platium RTD
Alpha = 0.0385
Note: All 4 wires MUST be run to the
sensor. Do not simply jumper REF- to
COM or REF+ to V+ at the FCM II.
For 3-wire and 2 wire probes, the
connection of REF- to COM and REF+ to
V+ should be as close as possible to the
probe (within inches).
White
Red
Red
White
Red
2-Wire RTD Connection
White
Red
3-Wire RTD Connection
Red
Com R-
R+
V+
D4
D3
D2
D1
RTD
Top Side
Bottom Row
NC
NC
I-
I+
E4
E3
E2
E1
Top Side
Middle Row
4-20 m A IN
Iout Rtn Com V+
F4
F3
F2
F1
Top Side
Top Row
4-20 m A OUT
E
D
F
Terminal
Number
1
2
3
4
1
2
3
4
1
2
3
4
Figure 3.5
FCM II Field Wiring: RTD