Omega Products SBG111954 Installation Manual
SBG111950, SBG111954,
SBG111956, SBG113000, SBG114166
Single Channel Zener Barrier
Instruction Sheet M1779/1199Instruction Sheet M1779/1199
Instruction Sheet M1779/1199
Instruction Sheet M1779/1199Instruction Sheet M1779/1199
DESCRIPTIONDESCRIPTION
DESCRIPTION
DESCRIPTIONDESCRIPTION
These shunt diode, safety barriers are one channel devices
which pass a unidirectional signal (D.C.) and limit the energy to a
level that cannot ignite an explosive atmosphere.
Approvals include FM, UL and CSA.
UNPACKINGUNPACKING
UNPACKING
UNPACKINGUNPACKING
Remove the Packing List and verify that you have received all
equipment. If you have any questions about the shipment,
please call the OMEGA Customer Service Department at
1-800-622-2378 or (203) 359-1660. When you receive the
shipment, inspect the container and equipment for any signs of
damage. Note any evidence of rough handling in transit. Immediately report any damage to the shipping agent.
NOTENOTE
NOTE
NOTENOTE
The carrier will not honor any claims unless all shipping material
is saved for their examination. After examining and removing
contents, save packaging material and carton in the event
reshipment is necessary.
Important: Read carefully and completely beforeImportant: Read carefully and completely before
Important: Read carefully and completely before
Important: Read carefully and completely beforeImportant: Read carefully and completely before
installing or connecting the solid-state relays.installing or connecting the solid-state relays.
installing or connecting the solid-state relays.
installing or connecting the solid-state relays.installing or connecting the solid-state relays.
INSTALLATION REQUIREMENTS
Location: Barriers must be installed and grouped in a non-
hazardous location. If necessary to locate in a hazardous area,
barriers must be mounted in a suitable enclosure which, along
with its installation, must be suitable for that location.
Environment: Environment:
Environment: The operating temperature range for these
Environment: Environment:
barriers is -40°F to +140°F (-40°C to +60°C). They should be
mounted in a clean, dry environment and be well ventilated, so
that the maximum temperature is not exceeded. If an enclosure
is used, it must be suitable for the location.
Earth Connection:Earth Connection:
Earth Connection: The bracket on which the barrier is mounted
Earth Connection:Earth Connection:
must be connected to an earth ground. Grounding should be
adequate for conduction of line-generated fault currents and
should have a resistance of less than one ohm. (See Figures 1
and 2.)
Non-Intrinsically
Safe Wiring
Earth Ground
Mounting
Panel
Resistance to ground must
Intrinsically
Safe Wiring
1. All barriers used for multiple barrier mounting must be of the
same polarity.
2. All intrinsically safe wiring must be segregated from
non-intrinsically safe wiring and shall have a minimum
insulation thickness of 0.010".
Zener
Barrier
Mounting
Clip
Protective Cover
ImportantImportant
Important
ImportantImportant
Fig. 1. Multiple Barrier MountingFig. 1. Multiple Barrier Mounting
Fig. 1. Multiple Barrier Mounting
Fig. 1. Multiple Barrier MountingFig. 1. Multiple Barrier Mounting
be less than one ohm.
**
Rail
*
**
**
*
6" Mounting Rail:
**
SBG-RAIL-6
12" Mounting Rail:
SBG-RAIL-12
18" Mounting Rail:
SBG-RAIL-18
Zener
Barriers
Safe Area Apparatus:Safe Area Apparatus:
Safe Area Apparatus: Safe area apparatus must not generate
Safe Area Apparatus:Safe Area Apparatus:
or be connected to sources having voltages greater than
250Vrms or VDC.
Product must be maintained and installed
in strict accordance with the National Electrical Code. Failure to observe this warning
could result in serious injuries or damages.
INSTALLATIONINSTALLATION
INSTALLATION
INSTALLATIONINSTALLATION
It is expected that the installation will be in accordance with ISA RP-
12.6, NEC Chapters 5 and 7 and FM Standards
Approval. The following specific points should be kept in mind:
WARNING
• Check that the barrier is of specified type and polarity.
• For multiple barrier installation, the barrier's safe area sides
should face one side of the enclosure and the intrinsically safe
sides should face the opposite side (see Fig. 1). Wiring must be
channeled and segregated as shown, so that no mis-wiring can occur
during servicing, testing or when replaced.
• Connect hazardous area equipment to terminals marked "3" and "2"
(Fig. 3). Common, commercially available signal wire may be used
provided its capacitance and inductance are below the following
maximum values:
- TABLE 1 -- TABLE 1 -
- TABLE 1 -
- TABLE 1 -- TABLE 1 -
ModelModel
Model
ModelModel
NumberNumber
Number
NumberNumber
SBG111950SBG111950
SBG111950
SBG111950SBG111950
SBG111954SBG111954
SBG111954
SBG111954SBG111954
SBG111956SBG111956
SBG111956
SBG111956SBG111956
SBG113000SBG113000
SBG113000
SBG113000SBG113000
SBG114166SBG114166
SBG114166
SBG114166SBG114166
RatedRated
Rated
RatedRated
VoltageVoltage
Voltage
VoltageVoltage
+15
+24
+30
+30
Signal Return Barriers
+30
GroupGroup
Group
GroupGroup
A, B, C, D, E, G
A, B, C, D, E, G
A, B, C, D, E, G
C, D, E, G
A, B, C, D, E, G
Parallel
Capac - uF
0.32
0.12
0.07
0.20
0.07
Series
Induct - mH
2.0
3.0
1.8
3.0
0.35
• Safety depends on earth continuity. The resistance to earth
ground must be less than 1 ohm.
Fig. 2. Optional Mounting ClipFig. 2. Optional Mounting Clip
Fig. 2. Optional Mounting Clip
Fig. 2. Optional Mounting ClipFig. 2. Optional Mounting Clip
(SBG113530)(SBG113530)
(SBG113530)
(SBG113530)(SBG113530)
NoteNote
: :
Note
: Positive signal channel shown. Sensor switch may be any
NoteNote
: :
non-voltage producing, essentially resistive device; containing no
energy storing components. Flow and level switches, temperature
switches, pressure switches or resistive transducers or transmitters
are typical devices.
Hazardous
Area
Sensor
Earth Ground
Bus Bar
Hazardous Area
Resistive
Transducer
****
**Littelfuse type 3AG or equal (optional). External fuses are
****
recommended to protect barrier from incorrect wiring or
equipment faults at start-up.
Note: Note:
Note: Redundant grounding required by CSA.
Note: Note:
Supply and Signal Return Barrier Type InstallationSupply and Signal Return Barrier Type Installation
Supply and Signal Return Barrier Type Installation
Supply and Signal Return Barrier Type InstallationSupply and Signal Return Barrier Type Installation
Safe Area
3
2
Fig. 3. Positive Signal Barrier InstallationFig. 3. Positive Signal Barrier Installation
Fig. 3. Positive Signal Barrier Installation
Fig. 3. Positive Signal Barrier InstallationFig. 3. Positive Signal Barrier Installation
(See Figure 2)
(4-20mA Transducer with Both Leads Floating
Zener Barrier12
Max. Line Voltage Input
Not To Exceed 250 Vrms.
GNDGND
GND
GNDGND
3
3
Rail
and Neg.Signal Common)
Supply
2
GNDGND
GND
GNDGND
Signal Return
(SBG114166)
2
Earth Ground
Fig. 4.Fig. 4.
Fig. 4.
Fig. 4.Fig. 4.
****
Fuse
**
****
(+)
Fuse
1
Fuse
1
4-20mA
(_)
****
**
****
****
**
****
Receiver
Input
Voltage
P.S.
Load
Earth
Ground
INSPECTIONINSPECTION
INSPECTION
INSPECTIONINSPECTION
A routine inspection should be made at intervals of not more than
two years. Harsh locations should be inspected more frequently to:
1. Check integrity of earth grounding (Less than one ohm).
2. Check unit labeling for legibility.
3. Check all interconnections for good electrical connections.
CautionCaution
Caution
CautionCaution
Never conduct tests while circuit is active. Use of
instruments between input and output will bypass barrier.
TESTINGTESTING
TESTING
TESTINGTESTING
• All testing is to be done with circuit inactive and all but earth
grounding disconnected.
• With a suitable ohmmeter (resolution to 1 ohm), measure the
resistance between terminals 1 and 3. The total resistance readings shown in
Table 2 Table 2
Table 2 indicate a good unit.
Table 2 Table 2
ModelModel
Model
ModelModel
NumberNumber
Number
NumberNumber
SBG111950SBG111950
SBG111950
SBG111950SBG111950
SBG111954SBG111954
SBG111954
SBG111954SBG111954
SBG111956SBG111956
SBG111956
SBG111956SBG111956
SBG113000SBG113000
SBG113000
SBG113000SBG113000
SBG114166SBG114166
SBG114166
SBG114166SBG114166
RatedRated
Rated
RatedRated
VoltageVoltage
Voltage
VoltageVoltage
+15
+24
+30
+30
+30
- TABLE 2 -- TABLE 2 -
- TABLE 2 -
- TABLE 2 -- TABLE 2 -
**
TotalTotal
*
Total
TotalTotal
**
Resist.Resist.
Resist.
Resist.Resist.
OhmsOhms
Ohms
OhmsOhms
183
390
750
303
Signal Return Barriers
33.9
*All resistance values are ±5%
LimitLimit
Limit
LimitLimit
Resist.Resist.
Resist.
Resist.Resist.
OhmsOhms
Ohms
OhmsOhms
153
360
720
273
30
Red Polysulfone Housing
11
1
11
Output
Terminal
Cover
31/64"
(12.3mm)
1-7/16"
(36.5mm)
33
3
33
Mounting
Screw
22
2
22
3-3/16" (81mm)
Locating
Pin
Fig. 5. Dimensions
FuseFuse
**
Fuse
*
FuseFuse
**
Max.Max.
RatingRating
Rating
RatingRating
mAmA
mA
mAmA
250
62
62
250
250
Max.
Max.Max.
VocVoc
Voc
VocVoc
17.3
26.2
33.1
36.1
36.1
II
SCSC
I
SC
II
SCSC
mAmA
mA
mAmA
112.8
72.7
46.0
132.3
0
DC Input toDC Input to
DC Input to
DC Input toDC Input to
Barrier, Max.Barrier, Max.
Barrier, Max.
ModelModel
Model
ModelModel
NumberNumber
Number
NumberNumber
SBG111950SBG111950
SBG111950
SBG111950SBG111950
SBG111954SBG111954
SBG111954
SBG111954SBG111954
SBG111956SBG111956
SBG111956
SBG111956SBG111956
SBG113000SBG113000
SBG113000
SBG113000SBG113000
SBG114166SBG114166
SBG114166
SBG114166SBG114166
Housing material is polysulfone.
Barrier, Max.Barrier, Max.
VoltageVoltage
Voltage
VoltageVoltage
+15
+24
+30
+30
+30
Fuse Rating
Current, mA
250
62
62
250
250
Signal
Polarity
Positive
Positive
Positive
Positive
Positive
- TABLE 3 -- TABLE 3 -
- TABLE 3 -
- TABLE 3 -- TABLE 3 -
(Specifications)(Specifications)
(Specifications)
(Specifications)(Specifications)
ApplicationsApplications
Applications
ApplicationsApplications
SeriesSeries
Series
SeriesSeries
Resist.Resist.
Resist.
Resist.Resist.
ΩΩ
Ω
ΩΩ
183
390
750
303
33.9
Class I & II,Class I & II,
Class I & II,
Class I & II,Class I & II,
Groups A, B, C,
D, E, F, G
Groups C, D, E, F, G
Signal Return Barrier
Groups A, B, C,
D, E, F, G
GroupsGroups
Groups
GroupsGroups
Div 1, 2Div 1, 2
Div 1, 2
Div 1, 2Div 1, 2
Reactive LimitsReactive Limits
Reactive Limits
Reactive LimitsReactive Limits
Capacitance
µµ
µF
µµ
0.32
0.12
0.07
0.20
0.07
Inductance
mHmH
mH
mHmH
2.0
4.9
11.1
3.0
0.35
AmbientAmbient
Ambient
AmbientAmbient
OperatingOperating
Operating
OperatingOperating
TemperatureTemperature
Temperature
TemperatureTemperature
-40° to +140°F
(-40° to +60°C)
-40° to +140°F
(-40° to +60°C)
WeightWeight
Weight
WeightWeight
66g
66g
66g
66g
66g
P/N 158353
Rev. E
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