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MICRO SWITCH EXPLOSION-PROOF LIMIT SWITCH
BX2 SERIES
TABLE 3. FLAME PATH MEASUREMENTS
Flame path
Max. gap
Push rod & bearing 0,076 mm
BX2 also meet the North American Hazardous Locations Des-
ignation: NEMA 7 - Class I, Groups B, C and D; NEMA 9 - Class
II, Groups E, F and G and comply with UL Standard: UL 894.
The BX2 is ideal for outdoor use or in adverse environments
where a combination of explosion-proof plus sealing require-
ments are needed. To comply with explosion proof require-
ments the BX2 has flame paths within the housing, which cool
exploding gases below the ignition temperature before they
reach explosive gases surrounding the housing. Flame paths
on the BX2 are (1) an extended plunger between the switch
cavity and head and (2) the cover-housing threads on the front
of the switch.
MOUNT, ADJUST, WIRE
MOUNTING
Note mounting dimension drawings for hole locations (Figures
8 through 10).
ADJUSTING INSTRUCTIONS
To give flexibility in application, the user can perform the ad-
justments described below in any order before wiring the unit.
ACTUATOR HEAD
The actuator head may be positioned in any of four directions.
1.
Loosen the four captive head screws.
2.
Place head in the desired position.
3.
Securely tighten the four screws to 1.4 Nm to 1.8 Nm
[12 in lb to 16 in lb] (Figure 1, page 2).
Comment
Cylindrical spigot joint
MICRO SWITCH BX2 Series Installation Instructions |
REVERSING THE ROLLER LEVER
Except for the offset roller levers, the roller arm may be reversed
to face the roller to the inside or outside of the arm.
FIGURE 1.
FIGURE 3.
POSITIONING LEVER
The lever on rotary actuated units is adjustable to any position
through 360° around the shaft.
1.
Loosen the cap screw with 9/64-inch hexagon key wrench.
2.
Move lever to desired position.
3.
Securely tighten screw until teller tab can no longer be
moved by hand.
4.
Tighten screw another 1/8 to 1/4 turn to assure lever is
tight on the shaft (Figure 2).
A 9/64-inch hex key wrench is provided in the adjusting tool set
LSZ4005
ADJUSTABLE LENGTH LEVERS
To adjust the length of the adjustable length levers, a 9/64-
inch hexagon key wrench is required. A 9/64-inch key wrench is
provided in the adjusting tool set LSZ4005.
TOP ROLLER PLUNGER
Position the top roller plunger in the desired roller plane, by
adjusting the head as explained under actuator head.
SIDE ROLLER PLUNGER
Grasp the plunger with a pair of pliers and rotate to the desired
horizontal or vertical position (Figure 3).
Issue 16
50047766
FIGURE 2.
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