Watlow Series 988 - Manual (Page 22)

2.12 WATLOW Series 988 User’s Manual Installation and Wiring, Chapter 2
Figure 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 12b —
Switched DC, Open Collector
98 _ _ - _ _ C _ - _ _ _ _
Maximum voltage: 42VО О (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 12d —
0-5V О О, 1-5VО О and 0-10VО О (dc) Process
98 _ _ - _ _ F _ - _ _ _ _
Minimum load impedance: 1K Ω
Figure 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 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:
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.