EMERSON EFD, EFDB, EDS Specifications
EFD/EFDB and EDS Series Factory Sealed Control Stations
Explosionproof, Dust-Ignitionproof
NEC:
Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Applications
• Push buttons and selector switches are used in conjunction with
contactors or magnetic starters for remote control of motors.
They provide circuit control and/or selection.
• Pilot lights provide visual assurance that an electrical function is
being performed at a remote or local location.
• EFD/EFDB and EDS factory sealed control stations conne
arcing of device within the enclosure, preventing ignition of
ignitable atmospheres during control operation of motors and
other equipment.
• Used in classied areas where ammable vapors, gases or
highly combustible dusts are present.
• For installation in chemical and petrochemical plants, reneries,
and other process industries.
Features
•
EFD/EFDB Push Buttons and Selector Switches
— Eliminate need for adding sealing ttings and compound at
each conduit entrance.
— Heavy-duty push buttons, 10 Amp, 600 Vac rated.
— Dozens of possible combinations of push buttons, pilot lights
and selector switches.
— Smooth, rounded integral bushing in each EFD/EFDB hub
protects conductor insulation.
— Accurately tapped, tapered hubs for tight, rigid joints and
ground continuity.
— Stainless steel push button shaft operates within stainless
steel bushing assuring long, maintenance free operation.
— Push button and selector switch contacts are silver cadmium
oxide which are ”sealed” in lower phenolic chamber isolated
from corrosive elements. Assures positive contact and long,
trouble-free operation.
— Enclosed stainless steel helper spring prevents accidental
operation of push button in severe vibration installations.
— Push button models also available with dust cap for use in
areas where excessive dust, moisture or corrosive conditions
are encountered.
— Corrosion resistant captive stainless steel hex head cap
screws hold EFKB covers to body.
— All EFD/EFDB momentary push buttons are supplied with
lockout type guards as standard. Hole in guard will accept
locks with up to 1/4” hasp. Permits locking of push button to
prevent unauthorized operation.
— Clearly marked terminals with brass screws assure quick,
easy wiring.
• EFD/EFDB Pilot Lights
— Factory sealed pilot lights supplied with red jewel/guard
assembly and 120 Vac/Vdc, 50/60 Hz, 6 Watt, Type 6S6 lamp.
— Models also available in combination with factory sealed push
buttons and selector switches.
• EFD/EFDB Selector Switches
— Factory sealed selector switches furnished with nylon cam-
operated, heavy-duty push buttons for either 2-position or
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
3-position maintained contact operation.
— High thermal and arc resistance, high dielectric strength.
• EDS Push Buttons
— Factory sealed — eliminates need for adding sealing ttings
and compound at each conduit entrance.
— Heavy duty, 10 Amp, 600 Vac.
— Switch is enclosed in separate sealing chamber.
EFDB Push Button EFDB Photocontrol
EDS Rocker Arm
Push Button
EFDB Pilot Light EFDB Selector Switch EFDB Maintained
— Sealing chamber has smooth, double anges that mate both
to cover and mounting enclosure to provide ame-tight joints.
— Pigtail leads from push buttons are factory sealed in sealing
well.
— Stainless steel hex head screws attach sealing chamber to
cover and mounting enclosure.
— Side rocker arm push button has lockout holes.
— EFD/EFDB backbox supplied with internal ground screw.
Standard Materials
• EFDB control stations: malleable iron body with copperfree
(4/10 of 1% max.) aluminum cover
• SPBB push putton: copperfree (4/10 of 1% max.) aluminum
upper barrel and phenolic lower barrel with nylon plastic button
(dust cap models have neoprene buttons)
• SPLN/SPLS pilot light: copperfree (4/10 of 1% max.) aluminum
guard and body assembly; steel clamping ring; and tempered
glass jewel
• SSBA selector switch: copperfree (4/10 of 1% max.) aluminum
operator mechanism, nylon cam, and sealed phenolic contact
block
• EDS control stations: malleable iron body and cover; copperfree
(4/10 of 1% max.) aluminum sealing chamber; and nylon
operating handle
EFDB Push Button
with Dust Cap
EFD Combination Pilot
Light and Push Buttons
Push Button
Select items suitable for Class I, Division 1 and 2, Groups B, C and D; Class II, Groups E, F and G and Class III. See product selection pages for suitable items.
4
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© January 2021
EFD/EFDB and EDS Series Factory Sealed Control Stations
Explosionproof, Dust-Ignitionproof
NEC/CEC:
Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Standard Finishes
• EFD/EFDB control stations: body, triple-coat—(1) zinc
electroplate, (2) chromate, and (3) epoxy powder coat
• SPBB push button, SPLN/SPLS pilot light and SSBA selector
switch: natural nish
• EDS control stations: body and cover: triple-coat—(1) zinc
electroplate, (2) chromate, and (3) epoxy powder coat sealing
chamber, natural nish
Options
• 1- or 2-gang copperfree (4/10 of 1% max.) aluminum bodies
and covers available. Add sufx – A.
• Three position selector switches with modied operation.
— Momentary contact right position, spring return to center,
maintained contact left position. Add sufx —SRC.
— Momentary contact left position, spring return to center,
maintained contact right position. Add sufx —SLC.
— Alternate contacts add sufx —ALT .
• EFD/EFDB selector switch lockout locks two or three position
handle in any position. Add sufx —LD.
• Push button front operated mushroom head (momentary
contact): Order by sufxes for desired color as follows:
— Red —NMRBRE
— Green —NMRBGR
— Black —NMRBBL
• EFD/EFDB pilot light jewel/guard assembly. Order by sufxes if
color desired is other than red, as follows:
— Amber —JGBA
— Blue —JGBB
— Clear —JGBC
— Green —JGBG;
— Opal —JGBO
• For colored LED jewel/guard assembly, order by sufxes:
— Red —LEDR
— Green —LEDG
— Amber —LEDA
• EFD/EFDB pilot light transformers for single pilot light per gang.
Order by sufx:
Primary Voltage Lamp Voltage Suffix
220 120 –TR-2
277 120 –TR-3
440 120 –TR-4
550 120 –TR-5
• EFD and EDS units may be supplied with brazed hubs as 3-,
4-, and 5-gang in a variety of hub congurations. See Ordering
Information page for how to order these and other ”custom”
units by adding sufxes to mounting body catalog numbers.
• Securing Rod for EFD/EFDB Push Button Lockout Guard. Add
sufx —SR.
• NPBRKT Nameplate Mounting Bracket to make circuit
description/identication easy.
— Pre-drilled holes in bottom of bracket allow direct mounting
to control stations with existing cover bolts.
— Pre-drilled holes in middle of bracket allow mounting of
customer’s circuit identication nameplate; epoxy glue may
also be used for mounting (phenolic nameplate not included).
— Bracket eliminates costly eld installation of drilling and
tapping to accommodate circuit identication nameplate.
— Brackets t side-by-side on 2-, 3- and 4-gang boxes and
3-devices.
NEC Certifications and Compliances
• UL Standards: UL 508, UL 698, UL 1203
• cULus Listed: E10449, E81751
Related Products
• For Hazardous Location Photocontrols, see Lighting Section.
Illustrated Features
EDS factory sealed rocker arm push button control station —
shows separate sealing chamber and device construction.
Rocker arm has holes for lock.
Securing Rod for EFD/EFDB Push Button
Lockout Guard — available as an optional item
as catalog number NBL-SR (single guard only)
or add Suffix — SR to push button catalog
number. Lockout Guard, furnished as standard
with the EFD/EFDB push button, may also be
padlocked.
SPBB factory sealed push
button used in EFD/EFDB Series —
standard type and unit with dust cap.
SPBB Design Features
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
Select items suitable for Class I, Division 1 and 2, Groups B, C and D; Class II, Groups E, F and G and Class III. See product selection pages for suitable items.
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© January 2021
5
EFD/EFDB and EDS Series Factory Sealed Control Stations
Explosionproof, Dust-Ignitionproof
NEC/CEC:
Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Catalog Numbering Guide
EFDC T – 10 J1U2 JGBG SNPTESTQ U2 SR SNPRUNQ
NEC Certified
Backbox/Hub
Arrangement:
EFD - Dead-End
EFDC - Feed-thru
EFK - Cover Only
Box Type:
B - 1-Gang or
Cover Only
L - 3-Device
T - Tandem
# of Gangs:
1 - 1-Gang
2 - 2-Gang
Blank - Tandem,
Cover Only or
3-Device
Full Catalog # EFDCT10-J1U2-JGBG-SNPTESTQ-U2-SNPTESTQ-SNPRUNQ
Feed-Thru Tandem Box with 1” Hubs.
In Gang #1: 2 Momentary Push Buttons and a Green Pilot Light.
In Gang #2: 2 Momentary Push Buttons with One Securing Rod.
With Special ”Test” and ”Run” Push Button Nameplates.
Options
Options Description Suffix
Momentary Push Button Securing Rod SR
Selector Switch Lockout LD
Spring Return From Right Selector Switch (3 Positions Only) SRC
Spring Return From Left Selector Switch (3 Positions Only) SLC
Alternate Contacts Selector Switch ALT
Change One Red Lens to Green Lens JGBG
Change One Red Lens to Opal Lens JGBO
Change One Red Lens to Amber Lens JGBA
Change One Red Lens to Blue Lens JGBB
Change One Red Lens to Clear Lens JGBC
Add 220/120 Vac Transformer (J1 Device Only) TR2
Add 277/120 Vac Transformer (J1 Device Only) TR3
Add 440/120 Vac Transformer (J1 Device Only) TR4
Add 550/120 Vac Transformer (J1 Device Only) TR5
Change One Red Pilot to Red LED LEDR
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
Change One Red Lens to Green LED LEDG
Change One Red Lens to Amber LED LEDA
Add Red Mushroom Head to Momentary Push Button NMRBRE
Add Black Mushroom Head to Momentary Push Button NMRBBL
Add Green Mushroom Head to Momentary Push Button NMRBGR
Locking Guard for Maintained Push Button SMPBLG
Hub Size:
50 - 1/2”
75 - 3/4”
10 - 1”
Device for
First Gang:
See Devices
Special Nameplate
for First Gang:
See Accessories
Options for
First Gang:
See Accessories
Special Nameplate
for Second Gang:
See Accessories
Device for
Second Gang:
See Devices
Options for
Second Gang:
See Accessories
Select items suitable for Class I, Division 1 and 2, Groups B, C and D; Class II, Groups E, F and G and Class III. See product selection pages for suitable items.
6
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© January 2021
EFD/EFDB and EDS Series Factory Sealed Control Stations
Explosionproof, Dust-Ignitionproof
NEC/CEC:
Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Devices
Available in
Device Description
One Pilot Light (Red Standard) Y J1
Two Pilot Lights Y J2
One Pilot Light and One Momentary Push Button Y J1U1
One Pilot Light and Two Momentary Push Buttons Y Y J1U2
One Pilot Light and One Maintained Push Button Y J1UM1
One Pilot Light and One Dust Cap Push Button Y J1DU1
One Pilot Light and One 12 Selector Switch (2 Position, 2 Circuit) Y J112
One Pilot Light and One 35 Selector Switch (2 Position, 4 Circuit) Y J135
One Pilot Light and One 102 Selector Switch (3 Position, 2 Circuit) Y J1102
One Pilot Light and One 345 Selector Switch (3 Position, 4 Circuit) Y J1345
One Monetary Push Button Y U1
Two Monetary Push Buttons Y U2
Two Side-By-Side Momentary Push Buttons Y U2DBL
Three Monetary Push Buttons Y Y U3
One Momentary Push Button and One Maintained Push Button Y U1UM1
One Momentary Push Button and One Dust Cap Push Button Y U1DU1
One Momentary Push Button and One 12 Selector Switch (2 Position, 2 Circuit) Y U112
One Momentary Push Button and One 35 Selector Switch (2 Position, 4 Circuit) Y U135
One Momentary Push Button and One 102 Selector Switch (3 Position, 2 Circuit) Y U1102
One Momentary Push Button and One 345 Selector Switch (3 Position, 4 Circuit) Y U1345
One Maintained Push Button (Mushroom Head - Red) Y UM1
Two Maintained Push Button Y UM2
One Maintained and One Dust Cap Push Button Y UM1DU1
One Maintained Push Button and One 12 Selector Switch (2 Position, 2 Circuit) Y UM112
One Maintained Push Button and One 35 Selector Switch (2 Position, 4 Circuit) Y UM135
One Maintained Push Button and One 102 Selector Switch (3 Position, 2 Circuit) Y UM1102
One Maintained Push Button and One 345 Selector Switch (3 Position, 4 Circuit) Y UM1345
One Dust Cap Push Button Y DU1
Two Dust Cap Push Buttons Y DU2
One Dust Cap and One 12 Selector Switch (2 Position, 2 Circuit) Y DU112
One Dust Cap and One 35 Selector Switch (2 Position, 4 Circuit) Y DU135
One Dust Cap and One 102 Selector Switch (3 Position, 2 Circuit) Y DU1102
One Dust Cap and One 345 Selector Switch (3 Position, 4 Circuit) Y DU1345
One 12 Selector Switch (2 Position, 2 Circuit) Y 12
One 35 Selector Switch (2 Position, 4 Circuit) Y 35
One 102 Selector Switch (3 Position, 2 Circuit) Y 102
One 345 Selector Switch (3 Position, 4 Circuit) Y 345
120 Vac Photocell Y PC120
277 Vac Photocell Y PC277
Three Dust Cap Push Buttons Y DU3
One Momentary and Two Maintained Push Buttons Y U1UM2
Two Momentary and One Maintained Push Buttons Y Y U2UM1
Three Maintained Push Buttons Y UM3
Three Pilot Lights Y J3
Two Pilot Lights and One Momentary Push Button Y J2U1
One Pilot Light and Two Dust Cap Push Buttons Y J1DU2
Two Pilot Lights and One Dust Cap Push Button Y J2DU1
One Pilot Light and Two Maintained Push Buttons Y J1UM2
Two Pilot Lights and One Maintained Push Button Y J2UM1
1-G, 2-G,
Tandem
Available in
3-Device Suffix
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
Select items suitable for Class I, Division 1 and 2, Groups B, C and D; Class II, Groups E, F and G and Class III. See product selection pages for suitable items.
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© January 2021
7
EFD/EFDB Series Factory Sealed Control Stations
Explosionproof, Dust-Ignitionproof
NEC/CEC:
Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Nameplates
Description Suffix
Mushroom Head Push Buttons (Maintained and Momentary)
Start MNPSTQ
Stop MNPSPQ
Emergency Stop MNPESTPQ
Blank MNPBQ
Pilot Light Nameplates
Blank LNPBQ
Forward LNPFWDQ
Jog LNPJOGQ
Run LNPRUNQ
Stop LNPSPQ
Start LNPSTQ
Down LNPDOWNQ
Fast LNPFASTQ
Slow LNPSLOWQ
Raise LNPRAISEQ
Lower LNPLOWERQ
Reset LNPRESETQ
Off LNPOFFQ
On LNPONQ
Reverse LNPREVQ
Close LNPCLOSEQ
Open LNPOPENQ
Up LNPUPQ
Test LNPTESTQ
Low LNPLOWQ
High LNPHIGHQ
Two Position Selection Switch Nameplates
Forward—Reverse SLNPFRQ
Hand—Auto
On—Off SLNPOO
Start—Stop SLNPSS
Blank SLNPBQ
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
Up—Down SLNPUDQ
Run—Jog SLNPRJQ
Auto—Hand SLNPAHQ
Off—Remote SLNPORQ
SLNPHAQ
Description Suffix
Three Position Selection Switch Nameplates
Forward-Off-Reverse SLNPFORQ
Hand—Off—Auto
Run—Off—Jog SLNPROJQ
Blank SLNPB3
Reverse—Off—Forward SLNPROFQ
Auto—Off—Hand SLNPAOHQ
Hand—Off—Remote SLNPHORQ
1—Off—2 SLNP102Q
Jog—Off—Run SLNPJORQ
Stop—Run—Start SLNPSRSQ
Local—Off—Remote SLNPLORQ
Jog—Off—Auto SLNP-JOAQ
Momentary Push Buttons
For Rectangular Weatherboot Style Only (Not for round weatherboot style)
Blank
Forward SNPFWDQ
Jog SNPJOGQ
Run SNPRUNQ
Stop
Start
Down SNPDOWNQ
Fast SNPFASTQ
Slow SNPSLOWQ
Raise SNPRAISEQ
Lower SNPLOWERQ
Reset SNPRESETQ
Off SNPOFFQ
On SNPONQ
Reverse SNPREVQ
Close SNPCLOSEQ
Open SNPOPENQ
Up SNPUPQ
Test SNPTESTQ
Low SNPLOWQ
High SNPHIGHQ
SLNPHOAQ
SNPBQ
SNPSPQ
SNPSTQ
Custom nameplates are not available.
Included as standard (no need to use suffix).
Select items suitable for Class I, Division 1 and 2, Groups B, C and D; Class II, Groups E, F and G and Class III. See product selection pages for suitable items.
8
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© January 2021
EFD/EFDB Series Factory Sealed Control Stations
Explosionproof, Dust-Ignitionproof
10 Amp, 600 Vac Max. for Heavy Duty Use. Furnished with Internal Ground Screw.
NEC/CEC:
Class I, Division 1,Groups B, C, D
Class I, Division 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
Hub Size
(Inches) Description
1-Gang — Momentary Contact
1/2
3/4 EFDB175-U1 EFDCB175-U1
1 EFDB110-U1 EFDCB110-U1
1/2
3/4 EFDB175-U2 EFDCB175-U2
1 EFDB110-U2 EFDCB110-U2
1-Gang — Red Mushroom Head — Maintained Contact – Emergency Stop Nameplate
1/2
3/4 EFDB175-UM1 EFDCB175-UM1
1 EFDB110-UM1 EFDCB110-UM1
2-Gang — Momentary Contact
1/2
3/4 EFD275-U1 EFDC275-U1
1 EFD210-U1 EFDC210-U1
1 Circuit
Universal
2 Circuits
Universal
1 Circuit
Universal
2 Circuits
Universal
Nameplate
Marking
Start/Stop
Start/Stop
Emergency
Stop
Start/Stop
Catalog Number
Dead-End Feed-Thru
EFDB150-U1 EFDCB150-U1
EFDB150-U2 EFDCB150-U2
EFDB150-UM1 EFDCB150-UM1
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
EFD250-U1 EFDC250-U1
1/2
3/4 EFD275-U2 EFDC275-U2
1 EFD210-U2 EFDC210-U2
3-Device — Momentary Contact
1/2
3/4 EFDL75-U3 EFDCL75-U3
1 EFDL10-U3 EFDCL10-U3
Malleable iron body and aluminum cover. For aluminum body, add suffix —A.
Aluminum body not available.
Shaded area indicates items suitable for Class I, Division 1 and 2, Groups B, C and D; Class II, Groups E, F and G and Class III.
For Class I, Division 1, Group B, external seals must be installed at each conduit entrance.
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© January 2021
4 Circuits
Universal
3 Circuits
Universal
Start/Stop
Start/Stop
EFD250-U2 EFDC250-U2
EFDL50-U3 EFDCL50-U3
9
EFD/EFDB Series Factory Sealed Control Stations
Combination Push Button and Pilot Light. Explosionproof, Dust-Ignitionproof
10 Amp, 600 Vac Max. for Heavy Duty Use. Momentary Contact. Furnished with Internal Ground Screw.
NEC/CEC:
Class I, Division 1,Groups B, C, D
Class I, Division 2, Groups B, C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 7CD, 9EFG
1-Gang
1 Circuit, 1 Pilot Light 2 Circuit, 1 Pilot Light
2-Gang
2 Circuit, 1 Pilot Light 2 Circuit, 2 Pilot Light
3-Device
Hub Size
(Inches) Description
1/2
3/4 EFDB175-J1U1 EFDCB175-J1U1
1 EFDB110-J1U1 EFDCB110-J1U1
1/2
3/4 EFDB175-J1U2 EFDCB175-J1U2
1 EFDB110-J1U2 EFDCB110-J1U2
1/2
3/4 EFD275-J1U2 EFDC275-J1U2
1 EFD210-J1U2 EFDC210-J1U2
1/2
3/4 EFD275-J2U2 EFDC275-J2U2
1 EFD210-J2U2 EFDC210-J2U2
1/2
3/4 EFDL75-J1U2 EFDCL75-J1U2
1 EFDL10-J1U2 EFDCL10-J1U2
1 Circuit
Universal and
1 Pilot Light
2 Circuit
Universal and
1 Pilot Light
2 Circuit
Universal and
1 Pilot Light
2 Circuit
Universal and
2 Pilot Lights
2 Circuit
Universal and
1 Pilot Light
Nameplate
Marking
EFDB150-J1U1 EFDCB150-J1U1
Start/Stop
EFDB150-J1U2 EFDCB150-J1U2
Start/Stop
EFD250-J1U2 EFDC250-J1U2
Start/Stop
EFD250-J2U2 EFDC250-J2U2
Start/Stop
EFDL50-J1U2 EFDCL50-J1U2
Start/Stop
Catalog Number
Dead-End Feed-Thru
1/2
3/4 EFDL75-J2U1 EFDCL75-J2U1
2 Circuit, 1 Pilot Light
2-Gang Tandem
2 Circuit, 2 Pilot Lights
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
For tandem bodies, external seals must be installed within 1.5 meters (5 feet) of each conduit entrance for Class I, Groups C and D.
Pilot Lights furnished with 6 Watt, 120 Vac 6S6 lamp and red jewel—Other colored jewels and LED’s listed under accessories and parts.
Malleable iron body and aluminum cover. For aluminum body, add suffix —A.
Aluminum body not available.
Shaded area indicates items suitable for Class I, Division 1 and 2, Groups B, C and D; Class II, Groups E, F and G and Class III.
For Class I, Division 1, Group B, external seals must be installed at each conduit entrance.
1 Circuit, 2 Pilot Lights
2 Circuit, 1 Pilot Light
1 EFDL10-J2U1 EFDCL10-J2U1
1/2
3/4 EFDT75-J1U2 EFDCT75-J1U2
1 EFDT10-J1U2 EFDCT10-J1U2
1/2
3/4 EFDT75-J2U2 EFDCT75-J2U2
1 EFDT10-J2U2 EFDCT10-J2U2
10
1 Circuit
Universal and
2 Pilot Lights
2 Circuit
Universal and
1 Pilot Light
2 Circuit
Universal and
2 Pilot Lights
Start/Stop
Start/Stop
Start/Stop
Visit our website at www.emerson.com or contact us at (800) 621-1506.
EFDL50-J2U1 EFDCL50-J2U1
EFDT50-J1U2 EFDCT50-J1U2
EFDT50-J2U2 EFDCT50-J2U2
© January 2021
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