IM 01C50B01-01E
2-10
2. NOTES ON HANDLING
F0210.EPS
Class I, II, III, Division 1,
Groups A, B, C, D, E, F and G
Temperature
Transmitter
Safety Barrier
Hazardous
Location
Nonhazardous
Location
General
Purpose
Equipment
+
–
+–
+
–
C
+
–
[Intrinsically Safe]
Supply
1
2
3
4
5
Sensor
Intrinsically
Safe Sensor
or Simple
Apparatus
b) FM Non-incendive Type
Caution for FM Non-incendive type.
Note 1. Model YTA /FU1 temperature transmitter
is applicable for use in hazardous
locations
• Non-incendive for Class I, Division 2, Groups A, B,
C & D.
Class II, Division 2, Groups E, F & G and Class III,
Division 1 Hazardous Locations.
• Outdoor hazardous locations, NEMA 4X.
• Temperature Class: T4
• Ambient temperature: –40 to 60°C
Note 2. Non-incendive field wiring Parameters of
the temperature transmitter:
• Supply Circuit (+ and -) •Sensor Circuit ( 1 to 5 )
Vmax : 30 V Voc/Vt : 9 V
Imax : 165 mA Isc/It : 40 mA
Pmax : 0.9 W Ca : 1 µF
Ci : 18 nF La : 10 mH
Li : 730 µH
• For the sensor input circuitry, these non-incendive
parameters must be taken into account when
installed.
• Installation Requirements between temperature
transmitter and general purpose equipment:
Voc Vmax, Isc Imax, Ca Ci + Ccable, La
Li + Lcable
Voc , Isc, Ca and La are non-incendive field wiring
parameters of general purpose equipment.
Note 3. Installation
• The general purpose equipment must be FM ap-
proved which have non-incendive field wiring
parameters.
•Installation should be in accordance with ANSI/ISA
RP12.6 “Installation of Intrinsically Safe Systems
for Hazardous (Classified) Locations” and the
National Electric Code (ANSI/NFPA 70).
• non-incendive sensor must be FMRC Approved or
be simple apparatus (a device which will neither
generate nor store more than 1.2 V, 0.1 A, 25 mW
or 20 µJ, ex. switches, thermocouples, LED’s or
RTD’s).
• Dust-tight conduit seal must be used when installed
in a Class II and III environments.
Note 4. Maintenance and Repair
• The instrument modification or parts replacement by
other than authorized representative of Yokogawa
Electric Corporation is prohibited and will void
Factory Mutual Intrinsically safe and Nonincendive
Approval.
F0211.EPS
Temperature
Transmitter
General
Purpose
Equipment
+
–
C
Supply
1
2
3
4
5
Sensor
Non-incendive
Sensor
or Simple
Apparatus
Class I, II, Division 2,
Groups A, B, C, D, E, F and G
Class III, Division 1.
Hazardous
Location
Nonhazardous
Location
+
–
[Nonincendive]
c) FM Explosionproof Type
Caution for FM Explosionproof type
Note 1. Model YTA /FU1 and YTA /FF1 tempera-
ture transmitters are applicable for use in
hazardous locations:
• Explosionproof for Class I, Division 1, Groups A, B,
C, and D.
• Dust-ignitionproof for Class II/III, Division 1,
Groups E, F and G.
• Enclosure rating: NEMA 4X.
• Temperature Class: T6
• Ambient Temperature: –40 to 60°C
• Supply Voltage: 42 V dc max.
• Output signal: 4 to 20 mA
Note 2. Wiring
• All wiring shall comply with National Electrical
Code ANSI/NEPA70 and Local Electrical Codes.
• “FACTORY SEALED, CONDUIT SEAL NOT
REQUIRED”.
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