ELECTRO-PNEUMATIC POSITIONER
DATA SHEET
ZLA
The electro-pneumatic positioner converts a 4 to 20mA DC
operation signal from an electronic controller, etc. into a
pneumatic signal to drive a diaphragm control valve. The operating position is determined accurately by feedback via
links to the positioner.
FEATURES
1. Various types
Flame-proof type, intrinsically safe explosion-proof type,
split range type, etc. are available.
2. Compactness and light mass {weight} result in easy
mounting.
Easily mounted because of light mass 3kg to a control
valve by using its link mechanism and clamper.
3. A low input resistance of 200Ω permits two positioners to
simultaneously operate.
SPECIFICATIONS
Input signal :
4 to 20mA DC, 4 to 12mA DC or 12 to
20mA DC
Input resistance : Approx. 200Ω (at 20˚C)
Accuracy rating : ± 1.0% of full range
Hysteresis :
0.75% of full range
Response time : Approx. 2 sec
(90% time of full range when using a valve
having the top of 240mm diameter and lift
of 16mm)
Lift adjusting range (Lever rotating range) :
10 to 100mm (6˚ to 40˚)
Air supply pressure and output signal :
Air supply pressure
[kPa] {kgf/cm2}
140 {1.43}
160 {1.63}
240 {2.45}
Output signal
[kPa] {kgf/cm2}
19.6 to 98.1 {0.2 to 1.0}
39.2 to 117.7 {0.4 to 1.2}
39.2 to 196.1 {0.4 to 2.0}
Output signal pressure gauge :
JIS class 3 with the graduation angle of
270˚
Input/output operations :
As specified by the customer
Normal action;
The output signal level increases as
the input signal level increases.
Reverse action;
The output signal level decreases as
the input signal level increases.
Nominal air consumption :
12NR/min (at the supply air pressure of
140kPa{1.43kgf/cm2})
20NR/min (at the supply air pressure of
240kPa{2.45kgf/cm2})
Maximum air consumption :
60NR/min (at the supply air pressure of
140kPa{1.43kgf/cm2})
80NR/min (at the supply air pressure of
240kPa{2.45kgf/cm2})
Ambient temperature :
–20 to +80˚C
Intrinsically safe explosion-proof type;
–20 to +60˚C
Flame-proof type;
–20 to +70˚C
Ambient humidity :
Less than 95% RH
External dimensions (H × W × D) :
215 × 212 × 128mm
Mas{weight} :
Approx. 3kg
Air pipe connection :
Rc1/4
Conduit connection :
G1/2
EDS12-1k
Date
Mar. 31, 1999
ZLA
Waterproof structure :
Splash proofing (JIS C 0920)
Explosion-proof structure :
Intrinsically safe explosion-proofing
(JIS i3nG5)
Flame-proofing
(JIS d2G4)
Finish color :
Silver (epoxy resin coating)
Acid and alkaliproofing treatment is applied to the standard products.
Mounting method :
Connected to the control valve yoke.
Small, medium and large valve stem securing links and clampers are available.
FUNDAMENTAL BLOCK DIAGRAM
Signal
current
Torque
motor
Force
Balance
beam
Force
DisplaceAir presment
Diaphragm Movement
Nozzle sure
control
pilot
valve
valve
DisplaceFeedback ment
level
spring
Lever
CODE SYMBOLS
1 2 3 4 5 6 7 8
ZLA
6
Description
Input signal
4 to 20mA DC
4 to 12mA DC
12 to 20mA DC
1
2
3
Output signal: input/output operation:
air supply pressure
19.6 to 98.1 kPa
(normal action) ... 140kPa
{0.2 to 1.0kgf/cm2}
{1.43kgf/cm2}
39.2 to 117.7 kPa (normal action) ... 160kPa
{0.4 to 1.2kgf/cm2}
{1.63kgf/cm2}
39.2 to 196.1 kPa (normal action) ... 240kPa
{0.4 to 2.0kgf/cm2}
{2.45kgf/cm2}
98.1 to 19.6 kPa
(reverse action) ... 140kPa
{1.0 to 0.2kgf/cm2}
{1.43kgf/cm2}
117.7 to 39.2 kPa (reverse action) ... 160kPa
{1.2 to 0.4kgf/cm2}
{1.63kgf/cm2}
196.1 to 39.2 kPa (reverse action) ... 240kPa
{2.0 to 0.4kgf/cm2}
{2.45kgf/cm2}
A
B
C
D
E
F
Explosion-proof structure
General use (Non-explosion-proof)
Intrinsically safe explosion-proof structure
(JIS i3nG5)
Flame-proof structure (JIS d2G4 conduit
pressure-resisting screw-coupled type lead in
system)
Flame-proof structure (JIS d2G4 flame-proof packing
connection type)
Y
A
B
C
0
1
2
3
Link mechanism and clamper
Non provided
Provided with the small link
mechanism and clamper
Provided with the medium link
mechanism and clamper
Provided with the large link
mechanism and clamper
See
"Outline
diagram"
OUTLINE DIAGRAM (Unit: mm)
2-11mm dia.
mounting holes
180
128
120
36
28
57
166
161
55
φ8
6~40˚
24
39
13
SUP
45
OUT
80
Air pipe connection
2- Rc1/4
Zero
Output signal adjustment
pressure gauge
"A"
Conduit connection
G1/2
<GENERAL and INTRINSICALLY SAFE EXPLOSION-PROOF TYPES>
2-11mm dia.
mounting holes
117
128
120
36
28
57
80
SUP
Air pipe
connection
2- Rc1/4
45
*Cable
gland
"A"
Conduit
connection
G1/2
SUP
179
174
55
φ8
6~40˚
24
39
13
OUT
80
Zero
Output signal adjustment
pressure gauge
"B"
Conduit
connection
G1/2
Note: *shows the part used for the flame-proof
packing type which used for 11mm
diameter cable.
<FLAME-PROOF TYPE>
Details of "B"
φ15
φ13
Link mechanism and clamper
15
17
6
22
G1/2
Valve stem
(φd)
L2
L1
19
G1/2
90
66
Details of "A"
Commection diagram
E
I-
I+
Input signal
7th digit
L1
L2
1
35
30
2
50
55
3
112
55
ZLA
RELATED DEVICES
Air set
Diaphragm type control valve
Opener (FXZ2 type)
ORDERING INFOMATION
1. Product name
2. Code symbol
3. Installation place and fitting bracket
4. Other requirements
Caution on Safety
*Before using this product, be sure to read its instruction manual in advance.
Head Office
6-17, Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
http://www.fesys.co.jp/eng
Sales Div.
International Sales Dept.
No.1, Fuji-machi, Hino-city, Tokyo, 191-8502 Japan
Phone: 81-42-585-6201, 6202 Fax: 81-42-585-6187
http: //www.fic-net.jp/eng
Information in this catalog is subject to change without notice.
Printed in Japan