Output 1 Option “B”, Solid State Relay
Figure
14
-
Solid State Relay,
Output 1, Option
“B”
Wiring Diagram.
Figure
15
-
DC Output 1 (Open
Collector), Option
72”
Wiring Diagram.
ModeI# 98_A-_ B
_0-0000
Solid
State
Relay
Solid State Relay
Watlow's
solid state relays change state at zero volts, which is *zero-cross switching.”
They are also optically
isolated,
which means the output circuitry is energized by
infrared light striking a photo-sensitive device. This results in virtual absence of
electri-
cally
generated noise,
pIus
output to input
electrical
isolation. Off state impedance is
2 O K o h m
minimum.
Output 1 Option “C”, DC Output (Open Collector)Model# 98_A-_C_0-0000
71
+
,
.
3
-Q
DCLoad
.
.
.
.
.
.
.
-
u
Switched DC
Watlow’s
solid state switch is a
low
current DC output (open
collector)
used to switch an
external power switching device such as an
SSR
or an
electromechanical
relay. The
input specifications of the power switching device must those
listed
for the SS
switch output. The power switching device must provide isolation between the SS
switch output and
load
power since the SS switch output is a non-isolated output.
Minimum load resistance is
5 O O o h m s.
Available
current is minimum
9mA,
22mA maximum.
16
WATLOW
Series
980/985
User’s Manual
Install
and Wire, Chapter
2