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<Read Me First>
IM 01W02E02-11EN
NOTE
• The temperature class of the antennas and the surge protective devices must be
determined in accordance with EN 60079-14, using Po = 60 mW for ISA antenna connector.
• The following conditions must be met for the connections to ISA
(total Li of simple apparatuses) + (total Lc) ≤ 3 mH
(total Ci of simple apparatuses) + (total Cc) ≤ 0.8 μF
• The equipment must be earthed in accordance with EN 60079-14, in order to maintain
intrinsic safety. A cable lug or a similar device shall be used to maintain the secureness of
the earth connection to the equipment. Care must be taken to avoid multi-point earthing
since the equipment is not galvanically isolated from the power supply.
b. Caution for ATEX Flameproof Certification
Note 1. Model YFGW520 Field Wireless Access Point with optional code KF27 is
applicable for use in hazardous locations.
• Certification: DEKRA 15ATEX0042 X
• Applicable Standards:
EN 60079-0:2012+A11:2013, EN 60079-1:2014, EN 60079-11:2012
• Type of Protection and Marking:
II 2 G Ex db [ib] IIC T4 Gb
• Ambient temperature: -40 to 70°C (-40 to 158°F)
• Power supply: Rated voltage: 24 V d.c.
Voltage Range(Note): 10.0 V d.c. to 26.4 V d.c.
Note: The equipment shall not be operated outside the range.
• Power dissipation: ≤ 3.5 W
• Um: 250 V
• RF power: ≤ 130 mW
• Antenna Connection: The following conditions shall be met.
(total Li of simple apparatuses) + (total Lc) ≤ 0.5 mH
(total Ci of simple apparatuses) + (total Cc) ≤ 0.09 μF
Note 2. Specific condition of use
• The flame paths differ from the standard values in EN 60079-1. Only personnel authorized
by Yokogawa Electric Corporation may repair the equipment.
• From the safety point of view, the intrinsically safe circuit of the Field Wireless Access Point
model YFGW520 shall be assumed to be connected to earth.
