Yokogawa EJX115A - Manual (Page 14)

<2. Handling Cautions>
12
IM 01C25A01-01E
Transmitter
Supply Safety Barrier*1
Nonhazardous Location
[Installation Diagram] (for EJX910A and EJX930A)
Hazardous Location
+
–
+
–
F0211.ai
Sensor out
RTD sensor
*2
● Without pulse output
● With pulse output
Transmitter
Supply
Safety Barrier*1
Nonhazardous Location Hazardous Location
+
–
+
–
+
Sensor out
RTD sensor
*2
Safety Barrier*1
+
–
Pulse
*1: • In any safety barriers used the output current must be
limited by a resistor “R” such that Io=Uz/R.
• The safety barrier shall be certified by notify body EU as
ATEX.
• When using non isolation barrier, connect to IS earthing
system.
*2: • RTD sensor is prepared by the user.
• The sensor signal line must withstand a test voltage of
500 V AC.
WARNING
To satisfy IP66 or IP67, apply waterproof glands to the
electrical connection port.
c. ATEX Flameproof Type
Caution for ATEX flameproof type.
Note 1. Model EJX/EJA-E Series pressure transmitters
with optional code /KF22 for potentially
explosive atmospheres:
• No. KEMA 07ATEX0109 X
• Applicable Standard: EN 60079-0:2009,
EN 60079-1:2007, EN 60079-31:2009
• Type of Protection and Marking Code:
Ex d IIC T6...T4 Gb, Ex tb IIIC T85°C Db
• Group: II
• Category: 2G, 2D
• Enclosure: IP66 / IP67
• Temperature Class for gas-poof:
T6, T5, and T4
• Ambient Temperature for gas-proof:
–50 to 75°C (T6), –50 to 80°C (T5), and
–50 to 75°C (T4)
• Maximum Process Temperature (Tp.) for gas-
proof:
85°C (T6), 100°C (T5), and 120°C (T4)
• Maximum Surface Temperature for dust-proof:
T85°C (Tamb.: –30* to 75°C, Tp.: 85°C)
* –15°C when /HE is specified.
Note 2. Electrical Data
• Supply voltage: 42 V dc max.
• Output signal: 4 to 20 mA
Note 3. Installation
• All wiring shall comply with local installation
requirement.
• The cable entry devices shall be of a certified
flameproof type, suitable for the conditions of use.
Note 4. Operation
• Keep the “WARNING” label attached to the
transmitter.
WARNING: AFTER DE-ENERGIZING, DELAY
5 MINUTES BEFORE OPENING. WHEN THE
AMBIENT TEMP.≥65°C, USE HEAT-RESISTING
CABLE AND CABLE GLAND ≥90°C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 5. Special Conditions for Safe Use
WARNING
• Electrostatic charge may cause an exlosion
hazard. Avoid any actions that cause the
gerenation of eletrostatic charge, such as rubbing
with a dry cloth on coating face of the product.
• In the case where the enclosure of the Pressure
Transmitter is made of aluminium, if it is mounted
in an area where the use of category 2D apparatus
is required, it shall be installed in such a way
that the risk from electrostatic discharges and
propagating brush discharges caused by rapid
flow of dust is avoided.
• The instrument modification or parts replacement
by other than an authorized Representative of
Yokogawa Electric Corporation is prohibited and
will void the certification.
• To satisfy IP66 or IP67, apply waterproof glands to
the electrical connection port.