Watlow Solid State Relay User Manual
Mounting and Installation
Screw #8-32
99-1017
Washer
Belleville #8
99-3047
Solid State
Relay
Thermal Pad
0830-0574-0000
Typical
Heatsink
A
ir
F
lo
w
PROCEDURE:
1. Surface must be flat and clean.
2. Use thermal pad or a thin coat
of Dow DC-340 thermal joint
compound between the relay
and heatsink.
3. Mount to heatsink or suitable
aluminum or copper plate.
4. Use Belleville (spring) washers
and tighten alternately until
spring is slightly deflected.
(approximately 6 inch pounds).
5. Heatsink should be mounted so
that fins are vertical.
6. Ambient temperature not to
exceed 122°F / 50°C when
mounted to suitable heatsink.
7. Do not mount SSR's on panels
that are painted, plastic, steel,
or stainless steel. These materials will not remove the heat
generated by the SSR.
8. Torque 6-32 screws for signal
wires to 10 in-lbs.
9.Torque screws for power connections to 20 in-lbs.
See the reverse side for typical
SSR wiring diagrams.
Solid State Relay
Instructions
1241 Bundy Blvd., P.O. Box 5580, Winona, MN 55987-5580
Phone: 507-454-5300, Fax: 507-452-4507 www.watlow.com
0600-0028-0007 Rev D (2393) Made in the U.S.A.
January 2011
H
eater
Limit Control
Contacts
(
If Required)
L2
L1
12
43
2
1
Semiconductor
Fuse
90-240VAC
AC Input
3-32VDC
DC Input
OR
(-)
(+)
Heater
Limit Control
Contacts
(If Required)
1(–) (+)2
4(–) (+)3
11
Fuse
Open Collector
DC Input, 3-32VDC
External
DC Power
Supply
0-100 VDC
Install diode if
load is inductive
(-)
(+)
SSR-100-20A-DC1
12
43
Limit Control
Contacts
(If Required)
L2
L3
L1
12
43
3 Phase
Heater
21
Semiconductor
Fuses
Control Input Signal
ç
DC or AC Input Solid State Relay Wiring Diagram
ç
ç
1
WARNING:
Wiring must conform to National
Electric Code
(NEC) safety standards, as well as
locally applicable
codes. Failure to
do so could
result in personal
injury or death.
DC Input, DC Output Solid State Relay Wiring Diagram
ç
3 Phase, 2 leg Solid State Relay Wiring Diagram
çç
ç
2
WARNING:
Wiring examples
show L2 in
240VAC or
480VAC configuration. In 120VAC
applications, L2 is
neutral and must
not be fused or
switched. Failure
to follow this
guideline could
result in personal
injury or death.
SSR Mounting and Installation Instructions
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