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MICRO SWITCH™ GSX Series
The GSX is often ideal for outdoor use or in adverse
environments where a combination of explosion proof plus
sealing requirements are needed. To comply with explosion
proof requirements the GSX 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 GSX are (1) an extended
plunger between the switch cavity and head and (2) the
cover-housing threads on the front of the switch.
All the basic switches used in the GSX Series incorporate a
positive break mechanism to force the NC (normally closed)
contacts open. This product complies with Machinery
Directive (89/392/EEC as amended by Directive
91/368/EEC) and complies with IEC/EN 60947-5-1.
MATERIALS OF CONSTRUCTION
The following materials are used in the GSX limit switch:
aluminum housing; buna-N seals; rubber, copper alloy, or
plastic rollers/plungers; zinc operating heads and actuator
arms. The suitability of these materials for the application
environment is solely up to the customer.
ADJUSTMENT, REPAIR, AND MAINTENANCE
The limit switch should be checked periodically by suitably
trained personnel for proper operation. Installation,
inspection, repair, and maintenance shall be carried out by
suitably trained personnel in accordance with the applicable
code of practice, e.g., EN/IEC 60079-14, EN/IEC 60079-19,
or EN/IEC 61241-14. The operating head may be rotated in
90° increments. Replacement operating heads or switching
elements may be ordered and installed. Repair beyond the
replacement of these components is not recommended.
REPLACING THE SWITCHING ELEMENT
Follow steps 2-13 in the installation instructions. The single
screw holding the switching element should be torqued to
0,56 Nm to 0,90 Nm [5 in-lb to 8 in-lb].
ROTATING OR REPLACING THE OPERATING HEAD
(SEE FIGURE 1)
1.
Using the TORX
®
tamper-resistant
bit (included),
loosen tamper-
proof screws and
remove head.
2.
Install the head in
the desired
position (90°
increments),
insuring seal
remains in correct
position while assembling head.
3.
Torque tamper-proof screws 1,4 Nm to 1,8 Nm [12 in-lb
to 16 in-lb].
2
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Figure 1.
Rotating GSX Head
Issue 8
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.
POSITIONING LEVER (SEE FIGURE 2)
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.
CHANGING DIRECTION OF ACTUATION OF SIDE
ROTARY HEAD
(SEE FIGURE 3)
The side rotary head
can be adjusted to only
rotate clockwise,
counterclockwise, or
both.
1.
Loosen the four
captive head screws
to remove the head.
2.
Lift the plastic
plunger and rotate it
so the key lines up
with the desired direction of rotation.
3.
Replace the head and securely tighten the four screws
to 1,4 Nm to 1,8 Nm [12 in-lb to 16 in-lb].
INSTALLATION INSTRUCTIONS
1.
Mount switch using M5 or #10 screws. Torque screws
to 4,9 Nm to 5,9 Nm [43 in-lb to 52 in-lb].
2.
Refer to circuit diagram on switch housing. Diagram
depicts safety switch with actuator at free position.
3.
Unscrew cover to expose the switching element for
wiring or replacement. To aid in cover removal, a
screwdriver or bar may be used on the wrenching lugs.
4.
Connect stranded wire (0,75 mm
AWG) or solid wire (0,75 mm
to connector terminals. Stripped wire ends or any
spade and ring connector that will fit the terminals may
be used. Spades may be up to 7,9 mm [0.312 in] wide,
rings up to 7,9 mm [0.312 in] diameter. With spade or
ring type connections, pre-insulated connectors or
heat-shrinkable tubing should be used to provide
insulation between terminals.
50032072
Figure 2.
Positioning GSX lever
Figure 3. Changing
actuation of GSX
side rotary head
2
to 2,5 mm
2
, 18-14
to 1,5 mm
, 18-16 AWG)
2
2
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