Yokogawa YFGW710 - Manual (Page 54)

<A3. YFGW710 Field Wireless Integrated Gateway>
A3-34
IM 01W01F01-01EN
(3) Installation
WARNING
• The installation of the devices should be carried out by the engineers or other professional
personnel of the related expertise. The installation should not be carried out by operators or
other unprofessional personnel.
• The installation should be in accordance with IEC 60079-14 and local electrical code.
• YFGW710 should be installed in upright position.
• The equipment shall be installed in accordance with the user’s manual.
• The instrument modification or parts replacement by other than authorized representative of
Yokogawa Electric Corporation is prohibited and will void IECEx certificate.
• The thread type of the cable entries shall be confirmed according to the user’s manual.
• Screws of power supply terminals shall be tightened with specified torque values: 1.2N•m to
1.4N•m.
• 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 equip-
ment.
• Keep the cap attached to the antenna connector (N type) until the installation of the antenna
or antenna cables to protect the inside of the connector from exposure of light. In case the
antenna or antenna cables are removed from the connector, the inside of the antenna con-
nector should be protected from exposure of light.
• The antenna and the surge arrester shall be a simple apparatus in accordance with IEC
60079-11. Li and Ci of the simple apparatus shall be negligible. Temperature class of them
shall be determined from Po = 20 mW.
• Cable parameters for the connection of the antenna and/or the surge arrester are:
Cc = 4 nF; Lc = 20 μH
• The equipment shall be earthed in accordance with IEC 60079-14, in order to maintain in-
trinsic safety. A cable lug or a similar device shall be used to maintain the secureness of the
connection to the equipment. Care should be taken to avoid multi-point earthing since the
equipment is not galvanically isolated from the power supply.
• YFGW710 does not have a power switch inside. Prepare an dedicated breaker for the exter-
nal power line to turn ON/OFF the device.
• Make sure that the breakers are installed in the power supply circuits located in non-hazard-
ous areas so that the power can be shutoff when abnormality occurs.
• Note a warning label worded
“DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE MAY BE PRESENT.”
“POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE INSTRUCTIONS.”
• Electrostatic charge may cause an explosion hazard. Avoid any actions that cause the gen-
eration of electrostatic charge, such as rubbing with a dry cloth on coating face of product
and antenna.
• Take care not to generate mechanical sparking when access to the instrument and periph-
eral devices in hazardous locations.