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D-4 Adhesion of Water, Chemicals, Solvent, and Oil
Do not use or store Relays in an atmosphere exposed to water,
chemicals, solvent, or oil. If Relays are exposed to water or
chemicals, it can cause rusting, corrosion, resin deterioration, and
burning due to tracking. Also, if they are exposed to solvents such as
thinner or gasoline, it can erase markings and cause components to
deteriorate.
If oil adheres to the transparent case (polycarbonate), it can cause
the case to cloud up or crack.
D-5 Vibration and Shock
Do not allow Relays to be subjected to vibration or shock that
exceeds the rated values.
If abnormal vibration or shock is received, it will not only cause
malfunctioning but faulty operation due to deformation of
components in Relays, damage, etc. Mount Relays in locations and
using methods that will not let them be affected by devices (such as
motors) that generate vibration so that Relays are not subjected to
abnormal vibration.
D-6 External Magnetic Fields
Do not use Relays in a location where an external magnetic field of
800 A/m or greater is present. If they are used in a location with a
strong magnetic field, it will cause malfunctioning.
Also, strong magnetic field may cause the arc discharge between
contacts during switching to be bent or may cause tracking or
insulation failure.
Magnetic
field
Relay
D-7 External Loads
Do not use or store Relays in such a way that they are subjected to
external loads. The original performance capabilities of the Relays
cannot be maintained if they are subjected to an external load.
D-8 Adhesion of Magnetic Dust
Do not use Relays in an atmosphere containing a large amount of
magnetic dust. Relay performance cannot be maintained if magnetic
dust adheres to the case.
E Relay Mounting Operations
A Plug-in Relays
E-A-1 Panel-mounting Sockets
1. Socket Mounting Screws
When mounting a panel-mounting socket to the mounting holes,
make sure that the screws are tightened securely. If there is any
looseness in the socket mounting screws, vibration and shock can
cause the socket, Relays, and lead wire to detach.
Panel-mounting sockets that can be snapped on to a 35-mm DIN
Track are also available.
2. Lead Wire Screw Connections
Tighten lead wire screws to a torque of 0.98 N·m (P7SA and
P7S).
If the screws connecting a panel-mounting socket are not
sufficiently tightened, the lead wire can become detached and
abnormal heating or fire can be caused by the contact failure.
Conversely, excessive tightening can strip the threads.
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Relay or
transformer
E-A-2 Relay Removal Direction
Insert and remove Relays from the socket perpendicular to the
socket surface.
Correct
If they are inserted or removed at an angle, Relay terminals may be
bent and may not make proper contact with the socket.
E-A-3 Terminal Soldering
Solder General-purpose Relays manually following the precautions
described below.
1. Smooth the tip of the solder gun and then begin the soldering.
• Solder: JIS Z3282, H60A or H63A (containing rosin-based flux)
• Soldering iron: Rated at 30 to 60 W
• Tip temperature: 280 to 300°C
• Soldering time: Approx. 3 s max.
Note: For lead-free solder, perform
the soldering under conditions that conform to the applicable
specifications.
2. Use a non-corrosive rosin-based flux suitable for the Relay's
structural materials.
For flux solvent, use an alcohol-based solvent, which tends to be
less chemically reactive.
3. As shown in the above illustration, solder is available with a cut
section to prevent flux from splattering.
When soldering Relay terminals, be careful not to allow materials
such as solder, flux, and solvent to adhere to areas outside of the
terminals. If this occurs, solder, flux, or solvent can penetrate inside
of the Relays and cause degrading of the insulation and contact
failure.
B Printed Circuit Board Relays
E-B-1 Ultrasonic Cleaning
Do not use ultrasonic cleaning for Relays that are not designed for it.
Resonance from the ultrasonic waves used in ultrasonic cleaning can
cause damage to a Relay's internal components, including sticking of
contacts and disconnection of coils.
C Common Items
E-C-1 Removing the Case and Cutting Terminals
Absolutely do not remove the case and cut terminals. Doing so will
cause the Relay's original performance capabilities to be lost.
E-C-2 Deformed Terminals
Do not attempt to repair and use a terminal that has been deformed.
Doing so will cause excessive force to be applied to the Relay, and
the Relay's original performance capabilities will be lost.
E-C-3 Replacing Relays and Performing Wiring
Operations
Before replacing a Relay or performing a wiring operation, first turn
OFF the power to the coil and the load and check to make sure that
the operation will be safe.
E-C-4 Coating and Packing
G7S and G7SA Relays are not fully sealed, so do not use a coating
or packing resin.
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
Incorrect
Solder
Flux
C-10
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