Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 24)

<1. INTRODUCTION AND GENERAL DESCRIPTION>
1-12
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
Electrical data are as follows;
Maximum Voltage (Ui) = 30V
Maximum Current (Ii) = 100mA
Maximum Power (Pi) = 0.75W
Internal Capacitance (Ci) = 13F
Internal Inductance (Li) = 0mH
Note 1: The output current must be limited by a resistor “R” such that Imaxout=Uz/R (linear source).
Note 2: Safety barrier certified by a notify body in EU as ATEX should be used.
Note 3: When using non isolation barrier, connect (*) to IS earthing system.
Note 4: Sensor module 2 is installed when required.
When measuring inductive conductivity, only one module can be installed.
Control Drawing (FM type)
Following contents refer “DOC. No. IKE039-A12”
Measuring module 1
Measuring module 2
(Refer to Note 7)
Sensor 1
Sensor 2
(Note 1)
Safety Barrier Housing Assembly
Supply -
Supply +
→ Non Hazardous Location Hazardous Location ←
-
+
Class I, Division 1, Groups A, B, C, and D
Class I, Zone 0 and 1, Group IIC
T4 for Ta = 55°C, T6 for Ta = 40°C
2 wire analyzer
Note: The measuring module on this drawing means
the sensor module on this General Specifications.
Electrical data are as follows;
Input Maximum Input Voltage (Ui) = 30V
Maximum Current (Ii) = 100mA
Maximum Power (Pi) = 0.75W
Internal Capacitance (Ci) = 13nF
Internal Inductance (Li) = 0mH
Sensor Input Circuit
Type of Measuring Module pH, SC and DO ISC
Maximum Voltage (Uo) 11.76 V 11.76 V
Maximum Current (Io) 116.5mA 60.6mA
Maximum Power (Po) 0.3424W 0.178W
External Capacitance (Ca, Co) 100nF 100nF
External Inductance (La, Lo) 1.7mH 8mH
Note 1: In any safety barrier used, the output current must be limited by a resistor “R” such that Imaxout=Uz/R.
Note 2: The safety barrier shall be FM Entity-Approved associated apparatus / barrier where :
Barrier Voc, Uo ≤ 30V;
Barrier Isc, Io ≤ 100 mA;
Barrier Po ≤ 0.75W;
Barrier Ca, Co ≥ 13 nF+Ccable;
Barrier La, Lo ≥ Lcable
Note 3: When using non isolation barrier connect (*1) to IS earthing system.
Note 4: pH and SC Sensor(s) are of a passive type to be regarded as ‘simple apparatus’ same as 06ATEX0218X,
06ATEX0219, IECEx KEM 06.0052X, FM3028779, 06ATEX0220X, 06ATEX0221, IECEx KEM 06.0053X or the one
individually certified with relevant parameters.
Note 5: ISC Sensor(s) are ISC40S of 00ATEX1067X or the one individually certified with relevant parameters.
Note 6: DO Sensor(s) are of a passive type to be regarded as ‘simple apparatus’ or the one individually certified with
relevant parameters.
Note 7: Measuring module 2 may not mounted. As for ISC module, only one can be mounted.
Note 8: Install per the National Electrical Code (NFPA 70)
Note 9: WARNING - Potential electrostatic charging hazard Electrostatic charge may cause an explosion hazard. Avoid any
actions that cause the generation of electrostatic charge, e.g., rubbing with a dry cloth.
Note 10: As an alternative to installing the FLXA21 in Division 2 using Class I, Division 2 wiring methods, the FLXA21 may
be installed in Division 2 using nonincendive field wiring in accordance with the National Electrical Code (NFPA
70) using the same parameters identified for intrinsically safe entity installations. The Associated Nonincendive
Apparatus shall have nonincendive field wiring connections which are FM Approved for use in the Class I, Division 2
location.