Regulatory Information
BEI provides high quality, environmentally sealed, reliable
product for industrial applications. In support of this we
have sought to qualify our products to a variety of recognized industrial standards. The qualifying agencies that we
have worked with include:
Underwriters Laboratories (UL)
C
This is the UL certification mark for products for the
Canadian market. These products have been evaluated
to Canadian safety requirements which may be somewhat
different from U.S. standards.
NEMA, UL, C-UL, CSA,
DEMKO, CENELEC and CE.
Protection to
Environmental Standards
Canadian Standards Association (CSA)
The Canadian Standards Association provides, among other
things, approvals for intrinsically safe systems. A number of
our encoder models are available with CSA approvals.
Ex
NEMA
National Electric Manufacturers
Association (NEMA)
This organization provides a set of standards for environmental (dust and moisture) protection of components largely associated with the motor industry. We generally
conform to the highest standards - NEMA Classes 4 and
13. See Table 1 next page.
IEC
The IEC organization provides a similar classification of
environmental protection for the European equivalent of
NEMA. Our encoders generally conform to the standards
of IP (Ingress Protection), standard IP65 or IP66.
Operation in Hazardous Environments
Underwriters Laboratories (UL)
This group provides testing services to NEMA standards
as well as for intrinsically safe and explosion proof components. Tables 2.1–2.3 detail the level of hazardous environment operation available for various encoder models.
CENELEC
This is the European certifying organization that sets the
standard for explosion proof and intrinsically safe components. Each country has its own agency that applies and
certifies to the CENELEC standards. The Danish agency is
known as DEMKO, the United Kingdom agency is called
BASEEFA, etc.
Communauté Europeenè (CE)
The Communauté Europeenè requirements are a European
electronic standard for electromagnetic compatibility. As of
January 1, 1996 all electrical or electronic components supplied to Europe must have the CE mark. Our encoders have
been tested to the "Heavy Industrial" standards of CE. This
is a self-certification process which is performed by a registered laboratory.
Table 1
NEMA
NEMA Status of BEI Industrial Encoder Division Encoders
NEMA Design Class
1
2
3
Encoder
Type
H40
H38
H25
H20
HS25
HS35
L25
E25
X
X
X
X
X
X
X
X
UL indicates that the encoders have been
tested by Underwriters Laboratories for a
specific enclosure type.
X indicates that the encoder is designed
to meet the UL requirements but has not
been submitted for testing.
Encoders used in a Type 12 environment
should be ordered with the hard anodize
finish to meet 200 Hour Salt Spray Test.
All H38’s are hard anodized.
3R
3S
4
4X
6
12 13
Minimum Requirement: Shaft Seal, Diecast
Cover and MS Connector or Cable Seal
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
UL
UL
X
X
X
X
UL
UL
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
The following tables list the approvals that are available for use of encoders in hazardous locations.
Table 2.1
European and North American Intrinsic Safety Approvals
Encoder
Type
Output
Driver
Input
VDC
CENELEC
U.S.
U.S.
Canadian
Standards
Standards C
Standards
Class I, Div I,
Class II, Div I,
Class I, Div I,
Group
Group
Zone 0
H25, L25,
E25, HS25*,
H35, HS35,
H37, H38,
or H40
4469
5
EEx ia IIB T4
C, D
E, F, G
Group IIB
924-08062-001 or -002
3904R
5
EEx ia IIC T4
A, B, C, D
E, F, G
Group IIC
924-08063-001
3904
5
EEx ia IIC T4
A, B, C, D
E, F, G
Group IIC
924-08064-001
3904
9
EEx ia IIB T4
C, D
E, F, G
Group IIB
924-08064-001
Ex
System
Diagram
*Rating only available with 4469 output driver
Table 2.2 Canadian Standards Association (CSA) Intrinsic Safety Approvals
Encoder
Type
Output
Driver
Input
VDC
Class I,
Div I,Group
H25 Incremental
7406(R)
5
C, D
H25 Incremental
8830
5
H20 Incremental
3904(R)
H25 8 bit Absolute
7406(R)
System
Diagram
924-08035
Encoder
Termination
EN 50081-2
EN 50082-2
C, D
924-08035
Connector, Metal
OK
Conduit (H38, H40)
OK
5
A, B, C, D
924-08035
Connector, Plastic
See Factory
5
D
924-08035
Pigtail
See Factory
Shielded/Jacketed
Cable
See Factory
Table 2.3 European and North American “Explosion Proof” Approvals
NEMA 7
U.S. Standards
Class I, Div I, Group
C
Encoder
Type
Table 3 CE Certification
CENELEC
US
H38 (Standard)
D
H38 (with Labyrinth Seal)
D
NEMA 7
U.S. Standards
Class II, Div I, Group
C
US
E, F, G
Table 4 Hazardous Environment Groups
Class I Groups
Division 1 & 2 Zone 0,1 & 2 Division 1 & 2
A (acetylene) IIC (acetylene E (metals)
& hydrogen)
B (hydrogen)
H38 CENELEC
H40
EExd IIA T5
D
Explosion Proof encoders can also be furnished with Intrinsic Safety Ratings.
Class II Groups
F (coal)
C (ethylene)
IIB (ethylene) G (grain)
D (propane)
IIA (propane)