Operation Manual

2-6
IM 1F5B2-01E
* Remote Type
Hazardous Location Non Hazardous Location
Flowmeter
Converter
(UYFA21)
UYF021
Signal Cable
Flowmeter
Detector
(UYF200-N)
+
SUPPLY
–
PULSE
+
A
B
C
A
B
C
+
–
Safety
Barrier 1
* Note 1
+
–
Safety
Barrier 2
* Note 1
Note 1: In any safety barrier used output current must be limited by a resistor ‘R’ such that Io=Uo/R
Note 2: The instrument modification or parts replacement by other than authorized representative of
Yokogawa Electric Corporation is prohibited and will void KEMA Intrinsically safe Certification.
2.10 Installation Precautions for CENELEC (KEMA)
Explosionproof
Suitable heat-resisting cables (heat-resisting over 90˚C) shall be used for the ULTRA
YEWFLO Model UYF200 Serise Ultrasonic Voltex Flowmeter when the ambient
temperature exceeds +70˚C and/or the process temperature exceeds 135˚C.
The cable entry devices shall be certified in type of protection flameproof enclosure “d”
and suitable for the conditions of use and correctly installed.