Yokogawa Wireless Temperature Transmitter YTA510 User Manual

Page 45

Advertising
background image

<8. Handling Caution>

8-5

IM 01C50T02-01E

Sensor circuit

EEx ia IIC T4

Maximum Voltage (Uo) = 7.7 V

Maximum Current (Io) = 70 mA

Maximum Power (Po) = 140 mW

External Capacitance (Co) = 1.6 µF

External Inductance (Lo) = 7.2 mH

Number of Devices
The number of devices (max. 32) possible on a

fieldbus link depends on factors such as the power

consumption of each device, the type of cable used,

use of repeaters, etc.
C) ATEX Intrinsically Safe “ic”
Caution for ATEX Intrinsically Safe “ic”

Note 1. Model YTA320-F/KN25 temperature

transmitters for potentially explosive

atmospheres:

* Applicable Standard: EN 60079-0: 2009,

EN 60079-0: 2012,

EN 60079-11: 2012

* Type of Protection and Marking:

II 3 G Ex ic IIC T4 Gc

* Ambient Temperature: –30 to 70°C

Ambient Humidity: 0 to 100 %

(No condensation)

* IP Code: IP67

* Overvoltage Category: I

Note 2. Electrical Data

[Supply Input]

Maximum input voltage, Ui = 32Vdc

Effective internal capacitance, Ci = 2.4 nF

Effective internal inductance, Li = 8 µH

[Sensor Output]

Maximum output voltage, Uo = 7.7 V

Maximum output current, Io = 70 mA

Maximum output power, Po = 140 mW

Maximum allowed external capacitance,

Co = 1.6 µF

Maximum allowed external inductance,

Lo = 7.2 mH

• The above parameters apply when one of

the two conditions below is given:

- the total Li of the external circuit

(excluding the cable) is < 1% of the Lo

value or

- the total Ci of the external circuit

(excluding the cable) is < 1% of the Co

value.

• The above parameters are reduced to

50% when both of the two conditions

below are given:

- the total Li of the external circuit

(excluding the cable) is ≥ 1% of the Lo

value and

- the total Ci of the external circuit

(excluding the cable) is ≥ 1% of the Co

value.

• The reduced capacitance of the external

circuit (including cable) shall not be

greater than 1µF for Group IIB and 600nF

for Group IIC.

Note 3. Operation

• Keep strictly the “WARNING” on the label

on the transmitter.

WARNING: POTENTIAL

ELECTROSTATIC

CHARGING HAZARD - SEE USER’S

MANUAL

Note 4. Installation

• Cable glands, adapters and/or blanking

elements shall be of Ex “n”, Ex “e” or Ex

“d” and shall be installed so as to maintain

the specified degree of protection (IP

code) of the equipment.

Note 5. Specific Conditions of Use

• Precautions shall be taken to minimize the

risk from electrostatic discharge of painted

parts.

• The dielectric strength of at least 500 V

a.c. r.m.s between the intrinsically safe

circuits and the enclosure of the Model

YTA series temperature transmitter is

limited only by the overvoltage protection.

• Nonmetallic stickers which include no

information for intrinsic safety can be

applied on the surface of enclosure as

long as each surface area of the sticker is

less than 400 mm

2

Note 6. Installation Diagram

F0804.ai

Temperature Transmitter

Electrical data are as follows;

Supply Input (Terminals: + and -)

Ui = 32 V

Ci = 2.4 nF

Li = 8 μH

Sensor Output (Terminals: 1 to 5)

Uo = 7.7 V

Io = 70 mA

Po = 140 mW

Co = 1.6 μF

Lo = 7.2 mH

SUPPLY

SUPPLY

SENSOR

Associated Apparatus

Hazardous Area

Non-hazardous Area

+

+

C

1
2
3
4
5

Advertising
This manual is related to the following products: