Watlow Electric 986, 987, 988, 989 Output 2 Wiring

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: 42VÎÎ(dc)
Maximum current: 1A 15 External
Load
+
16
17
-
COM
Figure 2.13d — 0-5VÎÎ, 1-5VÎÎand 0-10VÎÎ(dc) Process
98 _ _ - _ _ _ F- _ _ _ _
Minimum load impedance: 1KΩ
Figure 2.13c — 0-20mA and 4-20mA Process
98 _ _ - _ _ _ F- _ _ _ _
Maximum load impedance: 800Ω
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
-
+
Figure 2.13a — AC Outputs
Solid-state Relay with Contact Suppression
98 _ _ - _ _ _ B- _ _ _ _
0.5 amps, minimum off-state impedance: 20KΩ
Electromechanical Relay
with Contact Suppression
(Suppression between NO and COM contacts only)
98 _ _ - _ _ _ D- _ _ _ _
Form C, 5 amps, minimum off-state impedance: 20KΩ
Electromechanical Relay
without Contact Suppression
98 _ _ - _ _ _ E- _ _ _ _
Form C, 5 amps off-state impedance: 31MΩ
Solid-state Relay
without Contact Suppression
98 _ _ - _ _ _ K- _ _ _ _
0.5 amps, off-state impedance: 31MΩ
External
Load
COM L1
L2
Fuse
NO
15
16
NC
17
(#17 for D & E outputs only)
+
Internal Circuitry
15
16
17
790Ω
19 to 32VÎ (dc)
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).
˜
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.
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.
Loop powered
C2.wc 5/14/1999 8:45 AM Page 2.13