MEX-F-02231-B/Q 概述
Final Control Elements
MEX-F-02231-B/Q 数据手册
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PDF下载MODEL: MEX-F
Final Control Elements
[3] POSITION FEEDBACK INPUT
1: Potentiometer
2: Current
VALVE POSITIONER
Functions & Features
• I/I positioner for proportional valve position control in
combination with electric actuator (100 V AC)
• Driving directly AC motor by solid state relay output
• Potentiometer or current feedback selectable
• Timer preventing frequent ON-OFF operation, protecting
motor from overheating
[4] CONTROL OUTPUT
1: SSRs incorporated
2: Constant current driving external SSRs
3: 24 V AC dry contact
RE-TRANSMITTED OUTPUT
1: 4 – 20 mA DC
• Retransmitted output standard
Typical Applications
[5] POWER INPUT
AC Power
• Single phase AC motor
• Loop powered isolator can be used for isolating between
setpoint input signal and transmitter output signal
B: 100 V AC
C: 110 V AC
D: 115 V AC
F: 120 V AC
50
(1.97)
G: 200 V AC
H: 220 V AC
J: 240 V AC
80
(3.15)
DC Power
R: 24 V DC
136
(5.35)
mm (inch)
[6] OPTIONS (multiple selections)
Brake Function
blank: Without
MODEL: MEX–F–[1][2][3][4]1–[5][6]
/B: With (incorporated SSRs control output type only)
Signal Indicator
ORDERING INFORMATION
• Code number: MEX–F–[1][2][3][4]1–[5][6]
Specify a code from below for each of [1] through [6].
(e.g. MEX-F-11111-B/B/Q)
blank: Without
/E: Front-mounted LCD meter
(with operation mode selector type only)
Other Options
• Specify the specification for option code /Q
(e.g. /C01/S01/SET)
blank: none
/Q: Option other than the above (specify the specification)
[1] OPERATION MODE SELECTOR
1: With
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
0: Without
/C02: Polyurethane coating
/C03: Rubber coating
[2] POSITION SETPOINT INPUT
1: 4 – 20 mA DC (Input resistance 100 Ω)
2: 1 – 5 V DC (Input resistance 200 kΩ min.)
3: 4 – 12 mA DC (Input resistance 100 Ω)
4: 12 – 20 mA DC (Input resistance 100 Ω)
For switching direct/reverse actions with split ranges, select
"With" for Operation Mode Selector.
TERMINAL SCREW MATERIAL
/S01: Stainless steel
EX-FACTORY SETTING
/SET: Preset according to the Ordering Information Sheet
(No. ESU-4623)
MEX-F SPECIFICATIONS
ES-4623 Rev.7 Page 1/5
http://www.m-system.co.jp/
MODEL: MEX-F
SSR. To avoid the problem, install a resistor (R) in parallel
with the relay coil.
GENERAL SPECIFICATIONS
Construction: Plug-in
R < [Release Voltage] / ([Leakage Current at OFF] –
[Release Current])
Connection: M3.5 screw terminals
Screw terminal: Chromated steel (standard) or stainless
steel
Output Operation: Refer to the figure at the end of this
section.
Housing material: Flame-resistant resin (black)
Deadband adjustment: 2 – 20 % (front)
Timer adjustment: 1 – 30 sec. (front); 5 sec. minimum with
breaking function
■ Constant Current
Rating: 10 V DC, 10 mA ±10 % at ON;
0 mA at OFF
Output Operation: Refer to the figure at the end of this
section.
Isolation: Setpoint input or xmtr output or feedback input to
control output to power (For external SSRs control output,
non-isolated between control output and setpoint input etc.)
Zero adjustment (front)
• 24 V AC Dry Contact
Drive: Photo MOSFET relay
Rating: 27 V AC/DC @ 1 A
Potentiometer feedback: 0 – 25 %
Leakage current at OFF: 1 mA @ 30 V AC
Output Operation: Refer to the figure at the end of this
Current feedback: -10 – +10 %
Span adjustment (front)
section
• Output Operation (terminal No. in parentheses)
Potentiometer feedback: 75 – 100 %
Current feedback: 90 – 110 %
Deadband
0
Operation mode: Front-accessed DIP switches; failsafe
operation (full-open, full-closed or stop) when there is no
position input signal (approx. -12.5 %); direct/reverse re-
transmitted output; direct/reverse control action
Electronic limit: Front-accessed potentiometers provided for
Operation Mode Selector type
(2-3)ON to min.
–
(1-3)ON to max.
+
Deviation
(Setpoint) – (Feedback)
INSTALLATION
• Zero limit: Approx. -10 – +5 %
Power input
• Span limit: Approx. 95 – 110 %
•AC: Operational voltage range: rating ±10 %,
50/60 ±2 Hz, approx. 3 VA
Breaking function: Dynamic brake (applicable with 100 to
120 V AC motor only)
•DC: Operational voltage range: 24 V ±10 %, approx. 120
mA (ripple 10 %p-p max.)
LCD meter: Indicating re-transmitted output signal; 0.1 %
increments
Operating temperature: -5 to +60°C (23 to 140°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
INPUT SPECIFICATIONS
■ Setpoint Input
Weight: 300 g (0.66 lb)
Input resistor: Attached to input terminals (0.5 W)
■ POSITION FEEDBACK INPUT
• Current: 4 – 20 mA DC
PERFORMANCE in percentage of span
Position conversion accuracy: ±0.5 %
Input resistance: 20 Ω
Re-transmitted output accuracy: ≤ 3 % excluding offset and
deadband
• Feedback Potentiometer: 100 Ω – 10 kΩ
Minimum span: 50 % of total resistance
Excitation: 0.4 V DC
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute (setpoint input or
xmtr output or feedback input to control output to power to
ground)
OUTPUT SPECIFICATIONS
■ Re-Transmitted Output: 4 – 20 mA DC
Load resistance: 750 Ω max.
(For external SSRs control output, non-isolated between
control output and setpoint input etc.)
■ Control Output
• SSR: Zero-cross fucntion; 80 – 264 V AC @ 0.1 – 1 A
The built-in SSR cannot drive 200 V AC motor
(direct/reverse).
Leakage current at OFF: Approx. 10 mA @ 240 V
Remark: When driving relays with this control output, relays
may operate erratically due to the leakage current at OFF of
MEX-F SPECIFICATIONS
ES-4623 Rev.7 Page 2/5
http://www.m-system.co.jp/
MODEL: MEX-F
EXTERNAL VIEW
LCD Meter
Timer Adj.
Deadband Adj.
Zero Adj.
Electronic Limit
Zero Adj.
Electronic Limit
Span Adj.
1
2
3
4
Mode Selector
Span Adj.
Front Cover (open)
EXTERNAL DIMENSIONS unit: mm (inch)
CLAMP
(top & bottom)
7.8 (.31)
DIN RAIL
35mm wide
8
9
7
6
5
4
2–
4.5 (.18) dia.
MTG HOLE
25 (.98) deep
3
2
10 11
1
11
–M3.5
SCREW
50 (1.97)
107 (4.21)
136 (5.35)
40 (1.57)
50 (1.97)
[3.3 (.13)]
• When mounting, no extra space is needed between units.
TERMINAL ASSIGNMENTS unit: mm (inch)
INPUT RESISTOR
(model: REM)
8
7
6
5
4
9
3
2
10 11
1
Input shunt resistor attached
for current input.
MEX-F SPECIFICATIONS
ES-4623 Rev.7 Page 3/5
http://www.m-system.co.jp/
MODEL: MEX-F
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM
***
****
Break
SSR
DEAD-
BAND
ADJ.
No Input
Detector
Z
S
1
2
Input
Dir. / Rev.
Selector
Electronic
Limiter
Compa-
rator
Amplifier
+
R
–
Control
Output
Driver
5
6
4
*
CONTROL
OUTPUT
SETPOINT
RE-TRANSMITTED
OUTPUT
3
Feedback
Dir. / Rev.
Selector
Output
Driver
A
+
9
Position
Detector
POSITION
FEEDBACK INPUT
10
11
**
Timer
TIMER
Z
S
U(+)
7
8
POWER
V(–)
Base Socket
Input shunt resistor attached for current input.
*
** Option /E
*** Operation Mode Selector
****Option /B
3-PHASE MOTOR
M
Control Output Examples
max.
min.
+
•
•
Incorporated SSR
24V AC Dry Contact
•
External
SSR Drive
1
3-PHASE SSR
3-PHASE SSR
max.
min.
1
2
3
+
–
Constant
Curent
M
2
3
AC
MOTOR
SSR or
Photo MOSFET Relay
U
V
W
Position Feedback Input Examples
•
Potentiometer Feedback
•
Current Feedback
max.
9
9
Resist/
Voltage
Converter
FEEDBACK
POT
Voltage
10
+
10
11
Amplifier
FEEDBACK
–
11
min.
20Ω
Z
S
Z
S
MEX-F SPECIFICATIONS
ES-4623 Rev.7 Page 4/5
http://www.m-system.co.jp/
MODEL: MEX-F
SIGNAL CHARACTERISTICS & DIRECT/REVERSE ACTIONS
• POSITION SETPOINT INPUT & CONTROL OUTPUT
MAX
(100%)
1
2
SETTING
GRAPH
2
OPERATION
Reverse
Action
When the position setpont signal increases,
the control output goes towared maximum side.
Direct
Action
1
When the position setpoint signal increases,
the control output goes toward minimum side.
The positioner is factory set to "Reverse" control action.
Specify "Operation Mode Selector" type (code 1) when ordering, if changing out-
put action to "Direct".
MIN
(0%)
20
(100%)
4 POSITION
(0%) SETPOINT INPUT
• RE-TRANSMITTED OUTPUT & CONTROL OUTPUT
MAX
(100%)
1
2
SETTING
GRAPH
2
OPERATION
Reverse
Action
When the control output goes toward maximum
side, the re-transmitted signal increases.
Direct
Action
1
When the control output goes toward maximum
side, the re-transmitted signal decreases.
The positioner is factory set to "Reverse" control action.
Specify "Operation Mode Selector" type (code 1) when ordering, if changing out-
put action to "Direct".
MIN
(0%)
20
(100%)
4
(0%)
RE-TRANSMITTED
OUTPUT
EXPLANATIONS OF TERMS
• SSR (Solid State Relay)
Composed only of semiconductor parts, SSR is free from arc discharge or chattering which is typical with electromagnetic
relays. It features excellent characteristics against vibration, physical impact or other environmental conditions.
• Zero-Cross Function
SSR with zero-cross function turns on when AC power voltage is near zero, creating delay of switching when input is provided in
the middle of an wave cycle, thus limiting transient switching noise voltage and rush current.
• Photo MOSFET Relay
A kind of semiconductor relay which has advantages of both solid state relay and mechanical relay, thanks to its low ON-
resistance characteristic. It also features high speed ON/OFF operation and low leak current.
Specifications are subject to change without notice.
MEX-F SPECIFICATIONS
ES-4623 Rev.7 Page 5/5
http://www.m-system.co.jp/
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