Watlow Electric 988 用户手册
WATLOW Series 988 User’s Manual
2.13
Installation and Wiring, Chapter 2
Output 2 Wiring
Figure 2.13b —
Switched DC, Open Collector
98 _ _ - _ _ _ C - _ _ _ _
Maximum voltage: 42VÎ
Î (dc)
Maximum current: 1A
15
External
Load
+
16
17
-
COM
Figure 2.13d —
0-5V
Î
Î
, 1-5V
Î
Î
and 0-10V
Î
Î
(dc) Process
98 _ _ - _ _ _ F - _ _ _ _
Minimum load impedance: 1K
Ω
Figure 2.13c —
0-20mA and 4-20mA Process
98 _ _ - _ _ _ F - _ _ _ _
Maximum load impedance: 800
Ω
15
+
-
17
16
+
-
17
Figure 2.13e —
External Signal Conditioner Power Supply
98 _ _ - _ _ _ T - _ _ _ _
15
16
1
2
+
-
+V
-V
Transmitter
4-20mA out
Input
1 or 2
1 or 2
-
+
Figure 2.13a —
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
External
Load
COM
L1
L2
Fuse
NO
15
16
NC
17
(#17 for D & E outputs only)
+
Internal Circuitry
15
16
17
790
Ω
19 to 32V
Î
(dc)
• DIP switch set-
tings (
tings (
• Sensor match
(
(
and
• Sensor installation
(
(
˜
NOTE:
Input-to-output iso-
lation is defeated
when the external
signal conditioner
power supply is
used to power a
transmitter connect-
ed to input 1 or
input 2.
Input-to-output iso-
lation is defeated
when the external
signal conditioner
power supply is
used to power a
transmitter connect-
ed to input 1 or
input 2.
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.
Loop powered