Yokogawa YTA320 - Manual (Page 16)

<2. Notes on Handling>
2-0
IM 01C50B01-01E
• 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
approved 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.
F0210.ai
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 temperature
transmitters are applicable for use in hazardous
locations:
• Applicable Standard: FM 3600, FM 3615,
FM 3810, NEMA-250
• 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”.
Note 3. Operation
• Keep strictly the “WARNING” on the nameplate
attached on the transmitter.
WARNING: OPEN CIRCUIT BEFORE
REMOVING COVER. “FACTORY
SEALED, CONDUIT SEAL
NOT REQUIRED”. INSTALL
IN ACCORDANCE WITH THE
INSTRUCTION MANUAL IM
1C50B1.
• Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous location.
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 Explosionproof Approval.