Liquid Controls SP4000 - Manual (Page 31)

SP4000 Flow Computer
28
Hazardous Area Safe Area
4-20mA Temperature
Transmitter
4.3.3 Temperature Input
Common
4-20mA In
24V Out
Common
RTD Excit (+)
RTD Sens (+)
RTD Sens (–)
3-Wire RTD
MTL4755ac
Hazardous Area Safe Area
4.3.2 Pressure Input
4
5
6
7
8
1 2 3 4 5 6
7 8 9 10 1
1 12 13 14 15 16 17
4
5
6
7
8
4-20
T
–
+
1 2
4 3
28V
Diode
4.3 Recommendation for Wiring In Hazardous Areas
Hazardous Area Safe Area
SP712, SP720-2 24V Out
4-20mA In
Common
4.3.1 Flow Input
Examples using MTL787S+ Barrier (MTL4755ac for RTD)
4-20
P
+
–
2 1
3 4
28V
Diode
4
8
9
10
11
4-20mA Pressure
Transmitter
Common
24V Out
4-20mA In
1
2
3
4 4-20
Q/
∆
P
+
–
2 1
3 4
28V
Diode
MTL787S+
MTL787S+
MTL787S+