Watlow Series 988 - Manual (Page 25)

WATLOW Series 988 User’s Manual 2.15 Installation and Wiring, Chapter 2
Figure 15b —
Switched DC, Open Collector
98 _ _ - _ _ _ _ - _ C _ _
Maximum voltage: 42VО О (dc)
Maximum current: 1A
Figure 15a —
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 4 Wiring
External
Load
COM
L1
L2
Fuse
NO 5
6
NC
(#7 for D & E outputs only)
7
5
External
Load 6
+
7
-
COM
Figure 15c —
External Signal Conditioner Power Supply
98 _ _ - _ _ _ _ - _ T _ _
5
6
+
-
+V
-V
Transmitter
4-20mA out
Input
1 or 2
+ -
Controllers with Output 4 (R, S, or U)
For data communications wiring refer to “Data Communications
with the Watlow Series 988 Family of Controllers” manual. This
manual can be downloaded from Watlow’s website at www.wat-
low.com, Product Technical Information - Controls.
NOTE:
Input-to-output iso-
lation is defeated
when the external
transmitter power
supply is used to
power a signal con-
ditioner connected
to input 1 or input 2.
˜
NOTE:
See Chapter 1 for
power supply DIP
switch information.
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).
+
Internal Circuitry
5
6
7
790 Ω
19 to 32VÎ (dc)
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