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<Read Me First>
IM 01W02E02-11EN
b. Caution for IECEx Flameproof Certification
Note 1. Model YFGW520 Field Wireless Access Point with optional code SF27 is
applicable for use in hazardous locations.
• Certification: IECEx DEK 15.0021X
• Applicable Standards: IEC 60079-0:2011, IEC 60079-1:2014, IEC 60079-11:2011
• Type of Protection and Marking code : Ex db [ib] IIC T4 Gb
• Ambient Temperature: -40 to 70°C
• 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 IEC 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.
Note 3. Warning
WARNING
• DO NOT REMOVE COVER WHILE CIRCUIT IS LIVE WHEN A FLAMABLE OR
COMBUSTIBLE ATMOSPHERE IS PRESENT.
• AFTER DE-ENERGIZING, DELAY 1 MINUTE BEFORE OPENING.
• POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE INSTRUCTIONS.
• WHEN THE AMBIENT TEMPERATURE IS ≥ 60°C, USE HEAT-RESISTING CABLES AND
CABLE GLANDS WITH RATED TEMPERATURES OF ≥ 80°C.