Watlow Series 988 - Manual (Page 23)

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: 42VО О (dc)
Maximum current: 1A
15
External
Load
+
16
17
-
COM
Figure 2.13d —
0-5V О О , 1-5V О О and 0-10V О О (dc) Process
98 _ _ - _ _ _ F - _ _ _ _
Minimum load impedance: 1K
Ω
Figure 2.13c —
0-20mA and 4-20mA Process
98 _ _ - _ _ _ F - _ _ _ _
Maximum load impedance: 800
Ω
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: 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
External
Load
COM L1
L2
Fuse
NO 15
16
NC 17
(#17 for D & E outputs only)
+
Internal Circuitry
15
16
17
790 Ω
19 to 32V Î (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