User Manual

WATLOW Series 998 User’s Manual 2.13
Installation and Wiring, Chapter 2
Output 4 Wiring
Figure 2.13a
— AC Outputs
• Solid-state Relay with
Contact Suppression
0.5 Amps
Off-state impedance: 20KΩ min.
99 _ _ - _ _ _ _ - _ B
_ _
• Solid-state Relay without
Contact Suppression
0.5 Amps
Off-state impedance: 31MΩ
99 _ _ - _ _ _ _ - _ K
_ _
Figure 2.13b
— Switched DC, Open Collector
Minimum load resistance: 500Ω
99 _ _ - _ _ _ _ - _ C _ _
Figure 2.13c
— External Transmitter Power Supply
99 _ _ - _ _ _ _ - _ T _ _
See Chapter 1 for DIP switch location and settings.
For data communications wiring refer to How to Use
Data Communications with the Watlow Series 988 Family Controls.
NOTE:
Input-to-output iso-
lation is defeated
when the external
transmitter power
supply is used to
power a transmitter
connected to input
1 or input 2.
• Electromechanical Relay with
Contact Suppression
(On NO and COM contacts only)
Form C, 5 Amps
Off-state impedance: 20KΩ min.
99 _ _ - _ _ _ _ - _ D _ _
• Electromechanical Relay with-
out
Contact Suppression
Form C, 5 Amps
Off-state impedance: 31MΩ
99 _ _ - _ _ _ _ - _ E
_ _
External
Load
COM
L1
L2
Fuse
NO
5
6
NC
(7 for D & E outputs only)
7
5
External
Load
6
+
+ VÎ
Internal Circuitry
5
6
7
790
19 to 32VÎ (dc)
7
-
COM
Ω
5
6
+
-
+V
-V
Transmitter
4-20mA out
Input
1 or 2
+
-