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LA39-B series pushbutton
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Model
 
B1B2B3 according to different combination of button head and bracket
Button codes are discharged by Shanghai Electric Research Institution and used only by Shanghai APT CO.,LTD
Quantity of normally open contacts (NO) Quantity of normally close contacts (NC)
Secondary model    
Letters Meaning Letters Meaning Letters Meaning
  Momentary action pushbutton Z Emergency stop pushbutton XS Short level three-pos.selector switch
D Illuminated pushbutton actuator ZY Key release emergency stop pushbutton CX Long level two-pos.selector switch
T Maintained action actuator Y Two-position keylock switch CXS Long level three-pos.selector switch
M Mushroom-head pushbutton actuator YS Three-position keylock switch    
MT Maintained mushroom-head pushbutton X Short level two -pos ,selector switch    
Full-face colour /key selector action/ key removable positon
Red Green Yellow Blue White Black
r g y b w k
Spring return action Removable position of keylock selector
f fu ffu a ao au
left to center right to center left-right to center left center right
Voltage code of indicator
Code 21 22 23 24 25 26 27 28 31 32
Power supply AC-DC DC 50-60HzAC
Voltage 6V 12V 24V 36V 48V 110V 127V 220V 220V 380V
One with the mark "TH" can work in the condition of moist heat.
Technical Data
Switch rating AC-15 220V/6A
380V/4A 660V/2A		 DC-13 24V/6A
48V/3A 110V/1A 220V/0.5A 44OV/0.25A
Contact resistance hard silver contact≤50mΩ
Max. insulation voltage AC 2500V 50HZ 1min
Mechanical life normal botton≥3×105 select switch≥3×104 key button ≥5×104 emergency button ≥5×104
Electrical life ≥60×104
Rated thermal current 1th 10A
Rated insulation voltage Ui AC660V
Service temperature -25℃～+55℃
Front protective degree

IP65 (noted in order)
Material
Bezel of head Bracket Head Contact point Bracket house Contact panel
AL Black Zn or PBTPA PC AgNi PC Cu
 
Installation description for LA39-A series pushbutton

Insert the operator in the mounting hole from the front of panel,then twist in the bracket from the back of panel. Fasten the screws(not too stong,max.torque is 25N-cm).When the panel is plastic and other non-metal material,F5 (refer to page 14))can be put at the back of of the panel.When the mounting hole is 25mm,F6 (refer to page 14) can be put at the back of mounting panel.
For Z1 type,the contact block can be mounted together with bracket.
For Z2 type,the contact block should be disassembled ,then assemble the bracket.
For Z3 type,the contact block should be disassembled,then insert the bracket into the operator, clockwise the bracket and tighten the nuts in the bracket.
Note: lf it doesn't work smoothly after mounting,please adjust both tightening screws to keep balance.

Contact block can be directly fastened,the symbol parts can be mounted in the front of panel.Please fasten lamp holder before the contact block as mounting illuminated buttons.
Note:Please check the buckles of contact block after mounting.
Disassembly the contact block and lamp holder,please srewdriver to lift the buckles of the mounting system.The mounted parts can be easily disassembled.
Note:When mount the selectors,the white dots of short-knob and acumination of long-knob should be put upwards.
Mounting hole size
Normal pushbutton,illuminated pushbutton
key selector and selector
Mushroom pushbutton and long lever selector

Note:Min mounting hole distance is 35 x 50 as bracket is Z3.
Contact labelling
Using 2-digit figure:the first digit : 1,2 shows the contact block , 3,4 shows the contact position.
the second digit : 1,2 means normally close, 3,4 means normally open.
Function diagram of selectors and key selectors
 
 

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