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This PDF catalog information was published in November 2000.
Sensing and Control
Honeywell Inc.
11 West Spring Street
Freeport, IL 61032
www.honeywell.com/sensing
Manual Switches
Sealed Pushbutton Switches
EPM Series
FEATURES
1 High-intensity LEDs indicate status
changes – brilliant color display can be
distinguished even under high ambient
lighting conditions
1 Soft-glow LED backlighted legends for
low ambient viewing
1 Rugged sealed construction withstands effects of shock and vibration –
provides dependable switching/lighted display in severe environment
applications
1 Designed to comply with MIL-S-22885
1 Suitable for use in NEMA 4 and 13
enclosures
1 Low travel (.030 in. max.), with tactile
feedback for definite feel of switching
action
EPM Series Sealed Pushbutton Switches
meet high-performance needs for rugged, compact size sealed switches that
are exposed to water, oil, cleaning solvents, and many industrial chemicals.
They provide long, reliable operating life
under conditions of high shock and
vibration in severe environment applications.
In addition to being built to stand up to demanding environments, EPM switches
adhere to good human factors principles.
The design combines low travel with high
tactile feedback and meets arctic glove
requirements. Raised barriers on the bezel enhance finger positioning and help
prevent inadvertent operation of two
abutting units at one push. Lighted display options provide further application
versatility.
LED ILLUMINATION
Long-life LEDs enable reliable illumination. They resist effects of shock and vibration, reducing service and maintenance requirements. (Unlighted versions
are also available.)
Front-of-panel, hard mounting
Compact size
Field-replaceable legends
UL recognized, CSA certified, and MILS-8805 qualified basic switches
1 EPM22 electronic control and EPM32
power duty switching for electrical
flexibility
1 Matching EPM41 indicators for uniform
panel appearance
1 Choice of two housing styles:
Type C: Standard sealed EPM housings
Type B: Enhanced sealed EPM housings with IR filters for vehicle lighting security, designed to MIL-STD-461 (EMI
shielding), NBC compliance per
AR70-71
EASY TO INSTALL
Front panel hard-mounting is quick and
easy. Only a screwdriver is needed to
tighten the swing-out mounting lugs,
which securely lock and seal the unit in
the panel. Though the cover/bracket simply snaps onto the housing, it has inherent tamper resistance. The cover can be
removed intentionally with a small screwdriver (or other tool) to add or change legends.
EPM’s 3⁄4-inch square panel cutout on 1inch centers is suited to row, column, or
matrix arrays.
CONSTRUCTION
Insert can be furnished with or without
legends. If legends are to be backlighted, darker colors are recommended
for the insert. Black provides maximum
contrast in lighted legend displays.
Diffuser plates specified for lighted legend devices are coated on the underside for even illumination. When unlighted legends are specified, diffuser
plates are molded from opaque plastic
and are not interchangeable with those
used for lighted legends.
Manuals
The following lighting functions can be
furnished: High-intensity display using
two LEDs to create a brilliant light signal
that can be distinguished under high ambient conditions, and/or a pair of LEDs
which softly backlight the legend for viewing under low ambient conditions.
ELECTRICAL FLEXIBILITY
EPM switches can be furnished with one
or two SPDT basics. EPM22 electronic
control switches handle up to 1 amp,
EPM32 power duty switches up to 7
amps.
1
1
1
1
There is a choice of red, green or yellow
LEDs. Matching indicators, which provide
lighted display only, complement the
switches to help present a uniform panel
design.
Honeywell Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-416-293-8111 Canada
75
Manual Switches
Sealed Pushbutton Switches
EPM Series
SPECIFICATIONS
Environmental
Mechanical
Electrical
Operating Temperature
−40 to 85°C (−40 to 185°F)
Storage Temperature
−54 to 85°C (−65 to 185°C)
Seals
Viton bezel-to-panel gasket seal
and neoprene cover seal
Protection
NEMA 4 and 13
Total Travel
.030 in. (0,76 mm) max.
Operating Force
20 to 60 oz. (5,56 to 16,7 N) typical
Contact arrangement
1 or 2 SPDT
Electrical rating
EPM22/24 switches – 28 VDC: .5 amp ind., 1 amp res.
(sea level or 50,000 ft.), 2 amps max. inrush.
1 amp, 125 VAC (UL code L22).
EPM32/34 switches – 28 VDC: 4 amps ind., 7 amps res.
(sea level), 2.5 amps ind., 4 amps res. (50,000 ft).
115 VAC, 60 Hz: 7 amps res. or ind. (sea level).
EPM22/32 SWITCHES WITH SINGLE INDICATOR ORDER GUIDE
EPM22B
Y
R
6
AC
L
Housing Type and
Switch Contacts
Legend
Color1
Hi-Intensity
Indicator
Color
Switch
and LED
Terminals
Circuitry
Code
Insert Type
Standard Type C
Sealed Housing:
EPM22C
(Gold Contacts)
EPM32C
Silver Contacts
R Red
Y Yellow
G Green
X No LED
Enhanced Type B
Sealed Housing, with
IR filters, EMI shielding
& NBC compliance:
EPM22B
(Gold Contacts)
EPM32B
(Silver Contacts
1. When specifying Legend Color (R, Y, G),
the insert Type suffix letter must be either:
L (legended insert), or X (no insert
furnished).
2. To order insert separately, see EPM95
order guide.
76
R Red
Y Yellow
G Green
X No LED
2
Printed Circuit
AC
1-Pole
6
Hook style
LED terminals
and solder T2
switch
terminals
BC
2-Pole
(All are
momentary
action)
L
Legended insert.
Use Legend Order Sheet
FO-43973 to designate insert
color and legend.
X No insert furnished.2
Unlegended insert:1
B Blue
R Red
Y Yellow
G Green
W White
K Black
Example: EPM22BYR6ACL
Enhanced Type B sealed housing, gold contacts; high-intensity single indicator red lighted
display and yellow legend backlighting, hook style LED terminals and solder T2 switch
terminals; 1-pole circuitry, momentary action, furnished with legended insert, as specified in
FO-43973.
Honeywell Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-416-293-8111 Canada
Manual Switches
Sealed Pushbutton Switches
EPM24B
Y
Housing Type
and Switch
Contacts
Legend
Color1
Standard Type C
Sealed Housing:
EPM24C
(Gold Contacts)
EPM34C
(Silver Contacts)
EPM Series
D
Hi-Intensity Indicator Colors
R Red
Y Yellow
G Green
X No LED
Enhanced Type B
Sealed Housing,
incl. IR filters, EMI
shielding & NBC
compliance:
EPM24B
(Gold Contacts
EPM34B
(Silver Contacts)
Color
Code
Upper
LED
Lower
LED
R
Y
G
F
A
B
C
D
E
Red
Yellow
Green
Red
Yellow
Yellow
Green
Green
Red
Red
Yellow
Green
Green
Green
Red
Yellow
Red
Yellow
1. When specifying Legend Color (R, Y, G),
the insert Type suffix letter must be either:
L (legended insert), or X (no insert
furnished).
2. To order insert separately, see EPM97
order guide.
Y
R
Housing Type and
Switch Contacts
Legend Color1
Hi-Intensity
Indicator Color
Enhanced Type B
Sealed Housing with
IR filters, EMI
shielding & NBC
compliance:
EPM41B
R Red
Y Yellow
G Green
X No LED
1. When specifying Legend Color (R, Y, G),
the insert Type suffix letter must be either:
L (legended insert), or X (no insert
furnished).
2. To order insert separately, see EPM95
order guide.
AC
Switch
and LED
Terminals
Circuitry
Code
2
Printed
Circuit
6
Hook style
LED
terminals
and solder
T2 switch
terminals
AC
1-Pole
BC
2-Pole (All
are
momentary
action)
L
Insert Type
L
Legended insert.
Use Legend Order Sheet
FO-43973 to designate insert
color and legend.
X No insert furnished.2
Unlegended Insert:1
B Blue
R Red
G Green
W White
K Black
Example: EPM24BYD6ACL
Enhanced Type B sealed housing, gold contacts; yellow legend backlighting; high-intensity
dual indicator green/red lighted display; hook style LED terminals and solder T2 switch
terminals; 1-pole momentary action, furnished with legended insert, as specified in FO-43973.
EPM41B
Standard Type C
Sealed Housing:
EPM41C
6
R Red
Y Yellow
G Green
X No LED
2
LED Terminals
2
Printed Circuit
6
Hook style
L
Insert Type
L Legended insert.
Use Legend Order Sheet FO-43973 to
designate insert color and legend.
X No insert furnished.2
Unlegended Insert:1
B Blue
R Red
Y Yellow
G Green
W White
B Black
Example: EPM41BYR2L
Enhanced Type B sealed housing; high-intensity single indicator red lighted display and yellow
legend backlighting, printed circuit LED and switch terminals; furnished with legended insert,
as specified in FO-43973.
Manuals
Honeywell Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-416-293-8111 Canada
77
Manual Switches
Sealed Pushbutton Switches
EPM Series
EPM44 DUAL INDICATORS (NO SWITCHES) ORDER GUIDE
EPM44B
Y
D
2
L
Hi-Intensity Dual Indicator Colors
Housing Type and
Switch Contacts
Standard Type C
Sealed Housing:
EPM44C
Enhanced Type B
Sealed Housing, incl.
IR filters, EMI
shielding & NBC
compliance:
EPM44B
Legend
Color1
R Red
Y Yellow
G Green
X No LED
1. When specifying Legend Color (R, Y, G),
the insert Type suffix letter must be either:
L (legended insert), or X (no insert
furnished).
2. To order insert separately, see EPM97
order guide.
Color
Code
Upper
LED
Lower
LED
R
Y
G
F
A
B
C
D
E
Red
Yellow
Green
Red
Yellow
Yellow
Green
Green
Red
Red
Yellow
Green
Green
Green
Red
Yellow
Red
Yellow
LED
Terminals
2
Printed
Circuit
6
Hook style
Legend Insert Type
L Legended insert.
Use Legend Order Sheet
FO-43973 to designate
insert color and legend.
X No insert furnished.2
Unlegended Insert:1
B Blue
R Red
G Green
W White
K Black
Example: EPM44BYD2L
Enhanced Type B sealed housing; yellow legend backlighting; high-intensity dual indicator
green/red display; printed circuit LED and switch terminals; furnished with legended insert, as
specified in FO-43973.
HOW TO ORDER INSERTS SEPARATELY
Legended inserts: To order inserts legended by MICRO SWITCH as separate
items, order Catalog Listing EPM94, and use Legend Order Sheet to specify the
insert color and desired legend. Unlegended inserts: Use order guide below to
order inserts without legends.
EPM95 UNLEGENDED INSERTS ORDER GUIDE
Unlegended inserts can be furnished with or without a display window for hiintensity LED lighting.
Inserts for Type B Housings:
Inserts For Type C Housings:
Color
With window
Without window
With window
Without window
Blue
Green
Red
White
Yellow
Black
Gray
EPM95BBW
EPM95BGW
EPM95BRW
EPM95BWW
EPM95BYW
EPM95BKW
EPM95BPW
EPM95BBN
EPM95BGN
EPM95BRN
EPM95BWN
EPM95BYN
EPM95BKN
EPM95BPN
EPM95CBW
EPM95CGW
EPM95CRW
EPM95CWW
EPM95CYW
EPM95CKW
EPM95CPW
EPM95CBN
EPM95CGN
EPM95CRN
EPM95CWN
EPM95CYN
EPM95CKN
EPM95CPN
EPM97 INSERTS FOR DUAL INDICATOR DEVICES
Inserts for Type B Housings:
Inserts For Type C Housings:
Color
With window
Without window
With window
Without window
Blue
Green
Red
White
Yellow
Black
Gray
EPM97BBW
EPM97BGW
EPM97BRW
EPM97BWW
EPM97BYW
EPM97BKW
EPM97BPW
EPM97BBN
EPM97BGN
EPM97BRN
EPM97BWN
EPM97BYN
EPM97BKN
EPM97BPN
EPM97CBW
EPM97CGW
EPM97CRW
EPM97CWW
EPM97CYW
EPM97CKW
EPM97CPW
EPM97CBN
EPM97CGN
EPM97CRN
EPM97CWN
EPM97CYN
EPM97CKN
EPM97CPN
78
Honeywell Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-416-293-8111 Canada
Manual Switches
Sealed Pushbutton Switches
EPM Series
Manuals
Honeywell Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-416-293-8111 Canada
79
Manual Switches
Sealed Pushbutton Switches
EPM Series
MOUNTING DIMENSIONS (For reference only)
0,0 – mm
0.00 – in.
Panel Cutout
Panel thickness: .063 to .189 in.
(1,6 to 4,8 mm)
Center-to-center: 1 in. (25,4 mm)
rows or columns
Circuit Diagram
Switch Circuitry
LED Application Data
External resistors should be added to maintain the LED current
at 30 mA max., 20 mA typical. A minimum of 10 VDC open circuit
voltage with an appropriate series resistance be used to drive
the LEDs. This minimized the effect of temperature (current variation) on forward voltage of the LEDs. The example below illustrates a simple DC circuit and the equation used to determine
the value of the series resistance.
RS
E
VF
IF
Example: RS
For:
E
VF
IF
Terminal Detail
Notes:
1. LED terminals are Type 2 – PC only.
2. Mounting torque: 2 to 21⁄2 in.–lbs.
RS = E − VF
IF
Where:
LED Circuitry
=
=
=
=
Series Resistance
Supply
Forward Voltage of LED
Circuit Current
= 10 − 4.4 = 280 ohms
.020
= 10 volts
= 4.4 volts
= .020 amp
Characteristics: LED forward voltage @ .020
mA, VF: Red, 4.4; yellow, 4.4; green, 4.6.
80
Honeywell Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-416-293-8111 Canada
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Honeywell:
EPM95BGW-1044S EPM95BKN-1040S EPM95BKW-1041S EPM95BKW-1042S EPM95BKW-1043S
EPM41BGG6X EPM41BYY6X EPM95B-4000 EPM95B-4001 EPM95BGN EPM95BGW-1013S EPM95BGW-1014S
EPM95BGW-1015S EPM95BGW-1016S EPM95BGW-1017S EPM95BGW-1019S EPM95BKW-1045S
EPM95BKW-1046S EPM95BKW-1047S EPM95BKW-1048S EPM95BKW-1049S EPM95BKW-1050S EPM95BRN
EPM95BRW EPM95C-1000K EPM95C-1003 EPM95C-1004 EPM95C-1005 EPM95C-1006 EPM95C-1007
EPM95C-1008 EPM95C-1009 EPM95C-1010 EPM95C-1011 EPM95C-1012 EPM95C-1019 EPM95C-1021
EPM95C-1110 EPM95C-4001 EPM41BGG6L-3556 EPM41BGG6L-3557 EPM41BGG6L-3558 EPM41BGG6L-3559
EPM41BGG6L-3560 EPM41BRR6L-3561 EPM41BYY6L-3562 EPM95B-4002 EPM95B-4003 EPM95B-4004
EPM95B-4005 EPM95B-4006