Watlow Series 988 - Manual (Page 21)

WATLOW Series 988 User’s Manual 2.11 Installation and Wiring, Chapter 2
Figure 2.11b —
Digital Event Input 2
98 _ _ - _ 5 _ _ - _ _ _ _
open 0-3VÎ (dc) Event Input 2 off
closed 14-36VÎ (dc) Event Input 2 on
Figure 2.11a —
Digital Event Input 1
Available on all units.
open 14-36VÎ (dc) Event Input 1 off
closed 0-3VÎ (dc) Event Input 1 on
20
18
+5VÎ (VDC)
100 Ω
750 Ω
4.7K Ω
1K Ω .01 µf
19
Internal Circuitry
23 24
+ -
24 23
+24VÎ (dc)
10K Ω
4.99K Ω
OPTO
ISOLATOR
750 Ω
.01 µf
4.99K Ω
Internal Circuitry
20
18
20
19
+
-
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).
Event Input 1 Wiring