Watlow Electric 988 用户手册
2.12
WATLOW Series 988 User’s Manual
Installation and Wiring, Chapter 2
Figure 2.12a —
AC Outputs
Solid-state Relay
with Contact Suppression
98 _ _ - _ _ B _ - _ _ _ _
0.5 amps, minimum off-state impedance: 20K
Ω
Electromechanical Relay
with Contact Suppression
(Suppression between NO and COM contacts only)
98 _ _ - _ _ D _ - _ _ _ _
Form C, 5 amps, minimum off-state impedance: 20K
Ω
Electromechanical Relay
without Contact Suppression
98 _ _ - _ _ E _ - _ _ _ _
Form C, 5 amps off-state impedance: 31M
Ω
Solid-state Relay
without Contact Suppression
98 _ _ - _ _ K _ - _ _ _ _
0.5 amps, off-state impedance: 31M
Ω
Output 1 Wiring
Figure 2.12b —
Switched DC, Open Collector
98 _ _ - _ _ C _ - _ _ _ _
Maximum voltage: 42VÎ
Î (dc)
Maximum current: 1A
External
Load
COM
L1
L2
Fuse
NO
12
13
NC
14
(#14 for D & E outputs only)
12
External
Load
+
13
14
-
COM
Figure 2.12d —
0-5V
Î
Î
, 1-5V
Î
Î
and 0-10V
Î
Î
(dc) Process
98 _ _ - _ _ F _ - _ _ _ _
Minimum load impedance: 1K
Ω
Figure 2.12c —
0-20mA and 4-20mA Process
98 _ _ - _ _ F _ - _ _ _ _
Maximum load impedance: 800
Ω
14
-
+
12
14
-
+
13
+
Internal Circuitry
12
13
14
790
Ω
19 to 32V
Î
(dc)
);
• DIP switch set-
tings (
tings (
• Sensor match
(
(
and
• Sensor installation
(
(
).
NOTE:
Switching inductive
loads (relay coils,
solenoids, etc.) with
the mechanical
relay or solid state
relay output options
requires using an
R.C. suppressor.
Watlow carries the
R.C. suppressor
Quencharc brand
name, which is a
trademark of ITW
Paktron. Watlow
Part No. 0804-0147-
0000.
Switching inductive
loads (relay coils,
solenoids, etc.) with
the mechanical
relay or solid state
relay output options
requires using an
R.C. suppressor.
Watlow carries the
R.C. suppressor
Quencharc brand
name, which is a
trademark of ITW
Paktron. Watlow
Part No. 0804-0147-
0000.