Watlow Electric 988 用户手册
Figure 2.9d —
0-20mA or 4-20mA Process
Universal signal conditioner
98 _ _ - _ 2 _ _ - _ _ _ _
Input impedance: 7
Ω
Figure 2.9c —
0-5V
Î
Î
, 1-5V
Î
Î
or 0-10V
Î
Î
(dc) Process
Universal signal conditioner
98 _ _ - _ 2 _ _ - _ _ _ _
Input impedance: 10K
Ω
Figure 2.9b —
RTD (2- or 3-wire) (100
Ω
)
Universal signal conditioner
98 _ _ - _ 2 _ _ - _ _ _ _
WATLOW Series 988 User’s Manual
2.9
Installation and Wiring, Chapter 2
Input 2 Wiring
20
19
-
+
Figure 2.9a —
Thermocouple or 0-50mV (high impedance)
Thermocouple only
98 _ _ - _ 1 _ _ - _ _ _ _ (no DIP switches)
Universal signal conditioner
98 _ _ - _ 2 _ _ - _ _ _ _
Input impedance: 20M
Ω
19
20
+
-
Jumper
#19 to #20
for 2-wire
RTD
19
20
18
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
19
20
18
S2
S1
S3
O
N
↑
1
2
3
O
N
↑
1
2
3
O
N
↑
1
2
3
O
N
↑
1
2
3
20
18
-
+
DIP Switch
Setting
O
N
↑
1
2
3
19
20
+
-
0-50mV
• DIP switch set-
tings (
tings (
• Sensor match
(
(
and
• Sensor installation
(
(