Datasheet

20 sensing.honeywell.com
MICRO SWITCH™ Global Limit Switches, GLA Series
APPLICATION INFORMATION
Side Rotary Assemblies
The side rotary assemblies incorporate a feature for adjusting the
free position of the side rotary lever. The EN 50041 body style
allows infinite adjustment and reclamp. See the following dia-
grams for details of the mechanism in each case.
Figure 12. Standard EN 50041 Body Style
There are two lever mounting options:
1. By fully seating the lever in one of the four 90° detent posi-
tions on the shaft hub which provides positive lever retention.
2. By mounting the lever on the serrated portion of the shaft
(which enables the lever to be mounted in any position).
To change the rotary lever’s free position:
1. Use a 3 mm hex Allen wrench to loosen the Allen screw, as
shown in Figure 13, below.
2. Back off the lever 2 mm and move it to the desired free
position.
3. Retighten the Allen screw.
4. Check to see if the free position is satisfactory for the
application.
5. Repeat the adjustment procedure if necessary.
A teller tab located at the bottom of the lever (see diagram below)
helps prevent lever slippage. It enables the installer to detect the
correct tightening torque. When this tab cannot be moved, the
Allen screw has been tightened properly.
Figure 13. Allen Screw and Teller Tab Location
EN 50041 Side Rotary Actuator Direction Adjustment
As furnished, GLS rotary switches will operate when the lever is
rotated from either the left or right. They can be field modified to
operate in one direction only (Clockwise CW; Counter clockwise
CCW) by following these steps:
1. Carefully remove the complete head assembly.
2. Turn the head assembly upside down as shown in Figure 14.
3. Pull the plunger mechanism out and rotate it through 90°
increments until the alignment tab points to the desired func-
tion (CW, CCW, or CW and CCW).
4. Push plunger mechanism in.
5. Reassemble the head assembly and re-test the switch in its
application.
Figure 14. Actuation Adjustment
REPLACEMENT INSTRUCTIONS
All levers for side rotary assemblies are available as replacment
parts. All basics, except the plug-in, can be replaced. All EN
50041 heads can be replaced. The replacement procedures for
these components are straightforward in nature.
Side Rotary Levers
Remove the lever from the product being replaced. On EN 50041
product this is achieved by loosening the Allen screw holding the
lever on the shaft. Replace the lever and tighten the Allen screw
or combination screw. Re-test the switch in its application.
Heads
All EN 50041 style switch heads can be removed and replaced.
1. Remove the head by unscrewing the four retaining screws on
the head assembly.
2. Ensure replacement part is identical to one being removed.
3. Re-test the assembly and ensure correct operation.
Basic Switches
Non-plug-in
Basic switches can be removed and replaced by following this
procedure:
1. Remove the cover from the body.
2. Before disconnecting the switch wiring, carefully note the
wiring arrangement for your application, particularly the safety
ground connection.
3. Remove the basic switch retaining screw.
4. Remove the basic switch and install the replacement basic
switch.
5. Use the retaining screw to install the new basic switch –
ensure that it is correctly seated in the switch body.
6. Wire the switch terminals as before.
7. Before replacing the cover – ensure that the basic switch
wires are not twisted or otherwise lifted from the basic switch
(to prevent them from becoming trapped when the cover is
replaced).
8. Test the switch in its application.
Figure 15. Retaining screw location