YOKOGAWA FLXA21 User Manual

IM 12A01A02-01E 7/11
8th Edition
Measuring Module 1, 2
Type of Measuring Module
pH, SC, DO ISC SENCOM
Uo 11.76 V 11.76 V
5.36 V
Io 116.5 mA 60.6 mA 106.16 mA
Po 0.3424 W 0.178 W 0.1423 W
Co 100 nF 100 nF 31 μF
Lo 1.7 mH 8 mH 0.45 mH
Specic condition of use
- Precautions shall be taken to minimize the risk from electrostatic discharge of non-metallic parts and
painted parts of the enclosure. When the equipment used in hazardous locations, avoid any action
which generate electrostatic discharge such as rubbing with a dry cloth.
- The cable gland accompanying the equipment may not provide sufcient clamping. Additional clamping
of the cable shall be provided to ensure that pulling and twisting are not transmitted to the termination.
Alternatively, an Ex d, Ex e, or Ex n cable gland which provides sufcient clamping shall be used
instead of the accompanying cable gland.
Notes:
1. Installation must be in accordance with EN60079-14 and relevant local codes.
2. Measuring Module 2 is not always installed. As for ISC module and SENCOM module, only one
module is permitted to be installed at a time.
3. For Zone 2 installation, Sensor 1 and Sensor 2 may be equipment suitable for Zone 2
Ui (or Vmax) ≥ Uo
Ii (or Imax) ≥ Io
Pi ≥ Po
Ci ≤ Co – Ccable
Li ≤ Lo – Lcable
4. FLXA202 Analyzer must be installed in accordance with one of the following:
a) in a SELV or PELV system, or
b) via a safety isolating transformer complying with the requirements of IEC 61558-2-6, or a technically
equivalent standard, or
c) directly connected to apparatus complying with IEC60950 series, IEC61010-1, or a technically
equivalent standard, or
d) fed directly from cells or batteries.
5. WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD
CSA
Control Drawing (for 4-20mA type)
Class I, Division 2, Groups A, B, C, D, or
Class I, Zone 2, Group IIC,
Temperature Class: T4
Measuring Module 1
Measuring Module 2
Sensor 1
Sensor 2
Power Supply /
Control Equipment
(Note 4)
Housing Assembly
FLXA202 Analyzer
Supply
Supply
Non Hazardous AreaHazardous Area
Ex nA ic Ratings
Supply +, Supply –
Um: 29.6 V
Un: 16V to 29.6V (pH/ORP,SC,DO one module)
17V to 29.6V (ISC one module)
21V to 29.6V (SENCOM one module)
22.8V to 29.6V (pH/ORP,SC, DO two modules)
NIFW Parameters
Supply +, Supply –
Ui: 30 V
Ci: 13 nF
Li: 0 mH
-
+
-
+

YOKOGAWA FLXA21 Specifications

General

Brand	YOKOGAWA
Model	FLXA21
Category	Measuring Instruments
Language	English