YOKOGAWA FLEXA FLXA21-D-S Guide

Drawings
Unless otherwise specied, differences in the dimensions are specied as: General tolerance = ±(Criteria of tolerance class IT18 in JIS B0401-1998)/2.
All Rights Reserved, Copyright © 2010, Yokogawa Electric Corporation.
Subject to change without notice.
P-
FLXA21-D-S, FLXA21-D-U, FLXA21-D-E, FLXA21-D-W
2-Wire Analyzer
Stainless steel Housing
80
165
137
22.2 44
150
160
32.5
4-M6 depth 5
(For sensor 2 cable)
For sensor 1 cable
For power supply
Plate
(Only with coating)
80
137
165
25.326.5
FB4_06.ai
Unit: mm
Weight: Approx. 2 kg
Conduit Adapter (Option code: /CB4, /CD4, /CF4)
Adapter
49
(1.93")
G1/2 screw (/CB4), 1/2 NPT screw (/CD4)
M20x1.5 screw (/CF4)
Approx.
55(2.2")
Packing
Unit: mm(inch)
Nut
F0204.ai
SD 12A01A02-02E 1/4
1st Edition: Sep. 2010 (YK)
6th Edition: Sep. 2013 (YK)

SD 12A01A02-02E 2/4
6th Edition: Sep. 2013 (YK)
Unless otherwise specied, differences in the dimensions are specied as: General tolerance = ±(Criteria of tolerance class IT18 in JIS B0401-1998)/2.
P-
(Note) The universal mounting kit (/UM) contains the pipe and wall mounting hardware (/U) and the panel mounting
hardware (/PM).
Panel mounting hardware (Option code: /PM, /UM)
2-M5 length 35
185
178
100
195
134
Panel thickness
1 to 12
Spacing panel cutout
4-M6 *
Plate
(Only with coating)
138
+1
0
138
+1
0
FB4_08.ai
Unit: mm
*: Tighten the four screws to a torque of 2 N•m.
Wall mounting hardware (Option code: /U, /UM)
165 173
13
70
100
4-M6 *
165
200
50
15
234.5
For wall mounting
3-ø10 holes
FB4_07.ai
Unit: mm
*: Tighten the four screws to a torque of 2 N•m.

SD 12A01A02-02E 3/4
6th Edition: Sep. 2013 (YK)
Unless otherwise specied, differences in the dimensions are specied as: General tolerance = ±(Criteria of tolerance class IT18 in JIS B0401-1998)/2.
P-
Pipe mounting hardware (Option code: /U, /UM)
160
100
200
50 184.5
165
(214)
Pipe mounting (Horizontal) Pipe mounting (Vertical)
Pipe 50A
(ø60.5)
M8 U-bolt
4-M6 *
FB4_09.ai
Unit: mm
*: Tighten the four screws to a torque of 2 N•m.
Stainless steel hood (Option code: /H6, /H7, /H8)
184 220
(70)
(100)
9
165
165
72
57
(50)
199
FB4_10.ai
Unit: mm

SD 12A01A02-02E 4/4
6th Edition: Sep. 2013 (YK)
P-
nWiring Diagram
*2
*4
*5
*6
*6
nnnnnnnn n
nnnnnnnnn
+
–
*1: Use a 2-wire shielded cable with an outside diameter of 6 to 12 mm.
*2: Connect the analyzer to gland. (Class D ground: 100 ohm or less)
The minimum cross sectional area of the protective grounding cable should be 0.75 mm2.
*3: This line is connected to a distributor or 24V DC power supply.
*4: Terminal numbers for each sensor module are shown below.
*5: Two modules of the same kind of measurement/sensor type can be installed. When measuring inductive
conductivity or pH/ORP with the SENCOM sensor, only one module can be installed.
*6: The terminal box may be necessary depending on the sensor cable length and the distance between the
analyzer and the sensor.
The SENCOM sensor is to be connected directly to the analyzer without a terminal box.
*7: Two outputs, output 1 and output2, of PH201G or SDBT are same signals.
*1
WTB10 or BA10
Terminal box FLXA21 2-Wire Analyzer
Sensor
WTB10 or BA10
Terminal box
Sensor
PH Module
SC Module
ISC Module
DO Module
SENCOM Module
16
15191713181412
11
PH
NC
18171413151612
11
DO
151614171312
11
ISC
NC1615141312
11
SC
8786NC848382
NC
SENCOM
Power supply
Output 1 (1-5V DC)
20 to 130V DC
or
80 to 138V AC, 47 to 63Hz
Power supply
20 to 130V DC
or
80 to 138V AC, 47 to 63Hz
HOLD WASH
FAIL
Output 2 (1-5V DC)
Output 1 (1-5V DC)
Output 2 (1-5V DC)
Case of Distributor
PH201G (Style B)
Case of Distributor
SDBT
(*3)
*3
*7
*7
(*3)
A
+–
CMN CMN
BCDFH
L N
A
+–+–
B
1
+–
2
FH
L N
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