Watlow Electric 986, 987, 988, 989 Input 1 Wiring

2.8 WATLOW Series 988 User’s Manual Installation and Wiring, Chapter 2
Input 1 Wiring
Figure 2.8c — 0-5VÎÎ, 1-5VÎÎor 0-10VÎÎ(dc) Process
Universal signal conditioner
98 _ _ - 2_ _ _ - _ _ _ _
Input impedance: 10KΩ
Figure 2.8a — Thermocouple or 0-50mV (high impedance)
Thermocouple only
98 _ _ - 1_ _ _ - _ _ _ _ (no DIP switches)
Universal signal conditioner
98 _ _ - 2_ _ _ - _ _ _ _
Input impedance: 20MΩ
Figure 2.8b — RTD (2- or 3-wire) (100 Ω)
Universal signal conditioner
98 _ _ - 2_ _ _ - _ _ _ _
9
10
+
-
0-50mV
9
10
8
S2
S1
S3
10
9
-
+
Figure 2.8d — 0-20mA or 4-20mA Process
Universal signal conditioner
98 _ _ - 2_ _ _ - _ _ _ _
Input impedance: 7Ω
10
8
-
+
9
10
8
S2
S1
DIP Switch
Setting
R, S, B
DIP Settings
J, K, T, N, C, E, D, Pt2,
0-50mV DIP Settings
DIP Switch
Setting
DIP Switch
Setting
˜
NOTE:
Successful installa-
tion requires five
steps:
• Model number and
software choice
(Appendix);
• DIP switch set-
tings (Chapter 1);
• Sensor match
(Chapter 2 and
Appendix);
• Sensor installation
(Chapter 2); and
• Wiring (Chapter 2).
O
N
↑
123
O
N
↑
123
O
N
↑
123
O
N
↑
123
O
N
↑
123
9
10
+
-
Jumper
#9 to #10
for 2-wire
RTD
C2.wc 5/14/1999 8:44 AM Page 2.8