Installation and Service Instructions for CX Weather-Sealed
ISSUE 4
Explosion-proof Switches
PK 88136
0518
Sensing and Control
WARNING
IF USED IN APPLICATIONS CONCERNING HUMAN
SAFETY
• Only use NC direct opening (“positive
opening”/”positive break”) contacts, identified by the
symbol .
• Do NOT use flexible/adjustable actuators. Only use
actuators designed for safety applications.
• Do NOT defeat, tamper, remove, or bypass this
switch.
• Hazardous voltage, disconnect power before
servicing.
• Strictly adhere to all installation and maintenance
instructions.
• Consult with local safety agencies and their
requirements when designing a machine-control
link, interface and all control elements that affect
safety.
Failure to comply with these instructions could
result in death or serious injury.
GENERAL INFORMATION
Sealed construction for Honeywell CX explosionproof switches provides protection from the entry of
water, dust and oil as defined in NEMA 3, 4, 4X, 6,
6P, 13, and IP66/IP67 as defined in IEC 529.
CX Series products with conduit types ¾-14NPT
also meet the North American Hazardous Locations
Designation: Class I, Group C and D; Class II,
Groups E, F and G. CX listings beginning with
numbers 14, 16, 24, 26, 36, or 84 (example: 14CX1)
also meet Class I, Group B. These explosion-proof
and weather-sealed switches are protected from
flammable hydrocarbon atmospheres, metal dust,
coal dust, and grain dust, and comply with UL
Standard: UL 894 and UL 1203, CSA Standard:
C22.2 no. 25-1966, C22.2 no. 30-M1986.
Select CX Series products also meet the European
Hazardous Locations Designation: EExd IIC T6
category II 2 GD, KEMA 01ATEX2111X and
complies with the European Directive on Equipment
and Protective Systems Intended for Use in
Potentially Explosive Atmospheres (94/9/EC)
commonly referred to as the ATEX Directive.
Compliance with the Essential Health and Safety
Requirements has been assured by compliance with
EN50014 1997, EN50018 1994 and EN50281-1-1.
The European-approved products have a
temperature range of –40 °C to 70 °C [–40 °F to
158 °F], and when used within the maximum voltage
and current specified on the product will have no
heating problems. Notice: As ambient temperature
approaches 60 °C [140 °F], the cable entry can be
70 °C [158 °F] or higher. Cable branching can be
80 °C [176 °F] or higher, making it important to select
cable that meets these requirements.
Application Note: Enclosures are based, in
general, on the broad definitions outlined in NEMA
standards. Therefore, it will be necessary for the user
to determine that a particular enclosure is adequate
when exposed to the specific conditions that might
exist in intended applications. Except as might
otherwise be noted, all references to products
relative to NEMA enclosure types are based on
MICRO SWITCH evaluation only.
IMPORTANT: Switches without shaft re-storing
force do not have overtravel stops. On switches with
potentiometers, use care to insure that overtravel
does not exceed 125° in the application and during
set-up.
LEVER POSITIONING
Loosen the screw with a 9/64 inch hexagon key
wrench, move the lever to the desired position and
securely tighten the screw until the "teller tab" can no
longer be moved by hand. Then tighten the screw
another 1/8 to 1/4 turn to assure that the lever is tight
on the shaft. Hexagon key wrenches are provided in
adjusting tool set LSZ4005 for this purpose.
CAM ADJUSTMENT
Pretravel, overtravel, and actuation sequencing
can be adjusted and/or modified in the field. No tools
are required.
To Adjust Plunger Types:
1. Lift cam follower.
CX Series
ISSUE 4 PK 88136
2. Turn cam wheel to be adjusted to desired
position. Each notch on the wheel represents a
change in operation point of 0,116 mm (.0045
in.). Moving the cam wheel in the direction away
from the base housing advances the operate
point. Pretravel decreases and overtravel
thereby increases. When positioning cams, be
sure the cam follower is allowed to utilize the full
rise of the cam. This is required to provide
adequate overtravel and release travel of the
basic switches.
IMPORTANT: Do not use the set screw in the
cam follower to adjust travel characteristics.
3. Release cam wheel.
4. Release cam follower.
To Adjust Rotary Types:
1. Lift cam follower.
2. Move cam wheel axially to disengage teeth on
wheel from teeth on shaft disc.
3. Turn cam wheel to desired position. Turning in
direction of shaft rotation advances operate
point. Pretravel decreases and overtravel
thereby increases. Each notch on the cam
wheel represents an operating point change of
7°20'. The symbols on the cam wheel simplify
changing rotation from clockwise to
counterclockwise to center neutral, or vise versa.
If the switch operates on clockwise and
counterclockwise rotation, the pointer on the cam
follower lines up with symbol
or symbol on
the cam wheel. When symbol
lines up,
pretravel of 15° max. is obtained. When symbol
lines up, 80° max., pretravel is obtained.
Operation is in the direction of the inclined
surface of the symbol when
or lines up with
the pointer on the cam follower.
4. When cam wheel has been rotated to desired
location, release cam wheel to engage with
mating shaft disc.
5. Release cam follower
CX Wiring Methods
Honeywell recommends that conduit be installed
per NEC articles 501-4 and 501-5.
REPLACEMENT PARTS
Replacement switch assemblies consist of the
components subject to mechanical or electrical
wear. They include basic switches, cam wheels,
cam followers, and springs. The assemblies are
factory adjusted to have the same operating
characteristics as new complete switches.
How to Order
Catalog listings for complete switches can be
converted to replacement switch assembly catalog
listings as follows:
Momentary action rotary or plunger actuated
switches with shaft or plunger restoring force: To
order a replacement assembly, change the first digit
in the catalog listing for a complete switch to 9 for
rotary switches or to 10 for plunger switches.
For example, the replacement switch assembly
for a 12CX5 rotary switch = 92CX5. The
replacement switch assembly for a 36CX2 plunger
switch = 106CX2.
Maintained action rotary switches without shaft
restoring force: To order a replacement assembly,
change the first digit to a 9 and drop the first digit
following the letters CX.
Example: 12CX12=92CX2
Printed circuit board (includes potentiometer)
for 4-20 mA current output CX switches: 15PA261-
CX.
Plunger Switch
Assembly
Rotary Switch
Assembly
2 Honeywell • Sensing and Control
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