A7BL-206 Omron, A7BL-206 Datasheet - Page 9

• Manufacturer Part Number: A7BL-206
• Description: Thumbwheel Switch,BCD,BINARY CODED,Number Of Positions:7,SOLDER Terminal,THUMBWHEEL
• Manufacturer: Omron
• Series: A7BLr

Specifications of A7BL-206

• Output Code: BCD
• Read Out: 0 ~ 9
• Actuator Type: Pushwheel (Locking)
• Mounting Type: Panel Mount, Snap-In (Front)
• Termination Style: Card Edge
• Component Mounting Area: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: A7BL206

Precautions for Correct Use
Environment
Storage
Do not store Switches in areas subject to high temperature or high
humidity, or store them in room-temperature areas for extended
periods of time. Doing so may cause oxidation of the terminals or
problems with solder. It is also recommended that long periods of
storage be avoided in general.
Handling
Do not use where gases are generated (ammonia, chlorine, sulfur
dioxide).
Although Switches are of nearly dust-proof construction, they are
not drip-proof, therefore do not use in areas subject to water or oil
exposure and do not operate with wet or oily hands. (The A7MD
has a dust-proof construction on contact parts, but consider your
installation location carefully. The A7MA is not of dust-proof
construction.)
Provide additional dust-proofing measures, such as using a dust-
proof cover, when using in sand-exposed areas.
Wiring
After wiring has been completed, ensure an appropriate insulation
distance.
Set-up
Do not use the Switch in the normally-pressed state. Doing so may
occasionally result in premature deterioration of parts and changes
in the characteristics.
Do not touch charged parts, such as terminals, while the power is
ON.
Do not connect more than one power supply to a single Switch.
Doing so may result in circuit malfunctions and short-circuits.
When changing settings, do not touch the operating buttons if your
fingers are wet or there is oil or any other foreign substance on your
fingers.
It is recommended that alcohol is used to wipe off dirt and smudges
from the molded-plastic cases. Take care to prevent the alcohol
from getting inside.
Do not use thinner or other solutions which might damage the
plastic.
When connecting Switches, fit the mating parts together.
When separating Switches, use a screwdriver as shown in the
figure below; disconnect them by releasing the top and bottom
hooks. Be careful not to bend the hooks.
Do not push the (+) and (-) operating push-buttons at the same
time.
Do not drop the Switch. Doing so may possibly result in deformation
of the terminals, damage to the PCB, or damage to the resin catch
(for connecting) on the side of the Switch.
The output may be unstable while the pushbuttons are being
pressed due to the structure of the Thumbwheel Switch. Read the
output signal only after the display has stopped moving.
http://www.ia.omron.com/
Technical Guide for Thumbwheel Switches
Models with PCB Terminals
Reference: Terminals can withstand a force of
Connectors
Soldering
Note the following points when soldering printed circuit boards:
Back surface
of board
When using models with PCB terminals, make the terminal
insertion holes in the back board (mother board) 1 mm or larger in
diameter.
Do not use excessive force in handling models with PCB terminals.
In particular, take care to avoid dropping them as the terminals
might bend or break.
Insert Connectors while keeping the arrow pointing up (refer to
A7BS/A7BL and A7PS/A7PH for details).
Connector insertion load is about 14.7 N for each A7B-C and 34.3
N for each NRT-C.
Automatic Soldering
Do not use dip cleaning. Doing so may result in flux penetration of
the Switch interior, causing contact and rotational defects. Clean
the flux as shown in Figure 1, tilting the Switch 80 or less and using
a brush to apply the solvent only to the back of the board. It may
also be cleaned by dipping only the back of the board into the
solvent and then using a brush to clean.
Dip Soldering
When applying flux solvent, the dipping time is a maximum of 2
seconds. As shown in Figure 2, avoid flooding the top surface of the
printed circuit board with flux. Using a brush to apply flux further
reduces the danger of flux penetration. When cleaning flux with a
brush, tilt the Switch 80 or less, as shown in Figure 1, in order to
prevent flux from flowing onto the switch mounting surface. Clean
flux as described above under Automatic Soldering.
Using a Soldering Iron
Use a 30-W soldering iron at a temperature of 350 C for a
maximum of 3 seconds, and flush as described above.
Do not apply force to the terminals during soldering and for 3
minutes after soldering is completed. Doing so may result in
conduction or operation failure.
Ensure that soldering flux and alcohol do not penetrate into the
Switch interior
Figure 1
7.84 N for 1 minute or more (A7D: 4.9
N for 10 seconds or more), and survive
bending of 20 without breaking after
returning to original position.
Withstanding the repetitive application
of external pressure, however, is
beyond the scope of Switch
specifications.
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
80° or less
Wipe away flux
with a brush.
Figure 2
Top surface
of board
C-2