Kitz EXCN User manual

Document No.：KE-4040-01
Operation Manual
KITZ Type EXCN Electric Proportional Control Valve Actuators
Thank you for having chosen KITZ products.
For safe and trouble-free use of the product, ensure to
carefully read all instructions of this manual before
handling of the product. Keep this manual in a
convenient place for easy access of all valve operating
personnel.

Document No. : KE-4040-01 Page: 1/53
NOTES TO USERS
◆This manual provides users with the instructions on correct use of KITZ Type EXC electric
valve actuators. Ensure to carefully read every item of this manual before handling,
storage, installation, operation and maintenance of the product.
◆This manual covers the normal use of the product as a general guide to users, but does
not necessarily cover all possible conditions or situations that may occur on sites while the
product is being used. If technical assistance beyond the scope of this manual is required,
users are recommended to contact KITZ Corporation or the distributors in their locations.
◆Numerical limits and procedures provided in this manual for operation, maintenance and
inspection of the product are specified in consideration of safe and trouble-free operation.
It is forbidden to use the product in any condition that may exceed such numerical limits or
conflict with such procedures.
◆Drawings, tables, photographs and illustrations of the product in this manual provide users
with only the basic information. Ask KITZ Corporation or the distributors for detailed
assembly drawings of the products, if needed.
◆ Any information provided in this manual is subject to from-time-to-time change without
notice for error rectification, product discontinuation, design modification, or any other
causes that KITZ Corporation considers necessary.
◆ If any item of this manual is not strictly followed by users, KITZ Corporation shall have no
responsibility for any resulting accident or failure of the product.
SAFETY CAUTIONS
This manual calls users’ careful attention to the dangers and hazards that may be caused to
personnel or properties during handling, storage, installation, operation or maintenance of
the product. Such dangers and hazards are specifically highlighted in the operation
manual with either one of the following marks.
A warning indicates a potentially hazardous situation witch if
not avoided, will that result in death or serious injury.
A caution indicates a potentially hazardous situation witch if
not avoided, will that result in minor or moderate, or property
damage injury.
This mark is used to forbid the specified action.
This mark is used to forbid the specified action.
This mark is used to enforce the specified action.
This mark is used to forbid the specified action.
This mark is also generally used to call users’ careful attention.

Document No. : KE-4040-01 Page: 2/53
Contents
1. Product Summary........................................................................................................4
1.1. Technical features ....................................................................................................4
1.2. Circuitry configuration...............................................................................................5
1.2.1. Control circuitry block diagram............................................................................5
1.2.2. Summary of valve actuation................................................................................6
1.3. Appearance diagrams .............................................................................................7
1.4. Terminal board design ..............................................................................................9
2. Design Specifications.................................................................................................12
2.1. Standard design specifications................................................................................12
2.2. Optional design specifications.................................................................................13
3. Handling and Storage...................................................................................................13
4. Recommended Service Environments.........................................................................14
4.1. General precautions...............................................................................................14
4.2. Notes for outdoor installation ..................................................................................15
5. Valve Piping Installation.............................................................................................15
6. Electric Wiring...........................................................................................................16
7. Manual Valve Operation.............................................................................................18
8. Automated Valve Operation........................................................................................20
8.1. Items to confirm before automated valve operation...................................................20
8.2. Typical methods of operation ..................................................................................21
8.2.1. Proportional valve operation in reverse drive mode ............................................21
8.2.2. Proportional valve operation in direct drive mode...............................................21
8.3. Remote control mode .............................................................................................22
8.3.1. Preparation for remote control mode .................................................................22
8.3.2. Remote control operation..................................................................................22
9. Programming Control Setting and Signal Level Adjustment .............................................23
9.1. Summary...............................................................................................................23
9.2. Mode 2: Local operation with panel keys..................................................................25
9.3. Mode 3: Setting control parameter...........................................................................26
9.3.1. Adjusting dead band (Parameter Code 01).........................................................26
9.3.2. Detecting input signal cutoff (Parameter Code 02 and 03)...................................27
9.3.3. Selecting reverse of analog input signals (Parameter Code 04)...........................28
9.3.4. Adjusting [zero] point of analog input signal (Parameter Code 05).......................29
9.3.5. Adjusting [gain] of analog input signals (Parameter Code 06)..............................30
9.3.6. Selecting reverse of analog output signals (Parameter Code 07).........................31
9.3.7. Adjusting [zero] point of analog output signals (Parameter Code 08) ...................32
9.3.8. Adjusting [gain] of analog output signals (Parameter Code 09)............................33
9.3.9. Setting operation speeds (Parameter Code 12 to 19)..........................................34
9.3.10. Correcting analog output signals (Parameter Code 80 and 81)..........................36
9.3.11. Indicating soft versions (Parameter 99)............................................................37
9.3.12. Automatic tuning (Parameter Code [At])...........................................................37
9.4. Mode 4: Error indication (Parameter Code [Er])........................................................38
10. Maintenance and Inspection........................................................................................40
11. Dismantling from and Re-installation of Actuated Valves on Piping.................................40

Document No. : KE-4040-01 Page: 3/53
12. Adjustment of Valve Opening Positions........................................................................41
12.1. Adjusting limit switches.........................................................................................41
12.2. Adjusting valve opening positions..........................................................................41
13. Change-over of Types of Analog Input Signals..............................................................50
14. Trouble Shooting ........................................................................................................51
14.1. Disturbed motor drive ...........................................................................................51
14.2. Hunting phenomenon............................................................................................52
14.3. Other troubles......................................................................................................52
15. Product Warranty........................................................................................................52
Appendix 1. Technical Information:
Activation of Limit Switches Set for Shipment ......................53

Document No. : KE-4040-01 Page: 4/53
1. Product Summary
KITZ Type EXCN electric actuators proportionally control valve operating positions with
high accuracy, responding to instrumentation signals output from various programming
controllers.
1.1. Technical features
①Six following instrumentation signals can be handled for functional versatility. For
selection of the instrumentation signals, refer to Section 13 of this manual.
DC4~20mA (Standard)
DC0~5V / DC1~5V / DC0~10V / DC2~10V (Optional)
0~135Ω(Optional)
②Actuated valves can be opened or closed, responding to command signals input from
external contact points.
③If either one of DC4~20mA, DC1~5V or DC2~10V signal is used, to prepare for
incidental cutoff of input signals, an actuator can be preset for a desired valve
operation mode of either full closing, stopping, or full opening, by pressing a switch on
the control terminal board. In the case of input signal cutoff, a warning signal is output
by no-voltage relay contact, and lights up yellow [ERROR] LED.
④The valve opening angle is output by DC4~20ｍA signal. The fully open or closed
position is output as a no-voltage contact signal.
⑤A highly durable conductive plastic potentiometer is connected to the output shaft of a
non-backlash gear, for detection of valve opening angles. This helps reduce
mechanical hysteresis.

Document No. : KE-4040-01 Page: 5/53
1.2. Circuitry configuration
1.2.1. Control circuitry block diagram
Control circuitry of Type EXCN actuators are illustrated in Fig.1-1.
A
C200V
Analog signal input
M
Motor drive circuit A/D converter
Warning signal on detection
of input signal cutoff
DC4-20mA
opening
LS
Closing LS
CPU
4 operation keys
Mode and data
display in 5 digits
4 LED indicators
D/ A converter
Power source Power circuit
Remote command for
active/inactive/opening/closing
(DC5V is output from an actuator) Input
A
C100V
or
A
ux. closing LS
A
ux. opening LS
Cover opened: Interlocking output
Auxiliary limit switch
(opening/closing)
Heater for
prevention of dew
condensation
A / D converter
Dry contact
Dry contact
With voltage
Dry contact
Select either one of these control
signals. DC4〜20mA is our standard
signal.
0-135Ω
Control signal
DC4-20m
DC1-5V
DC0-5V
DC0-10
DC2-10
Valve position transmitter
Heater on
Analog signal output
Scope of supply
Valve
opening position
detector
( Potentiometer)
Fig.1-1 Control circuitry block diagram
circuit
Relay
circuit

Document No. : KE-4040-01 Page: 6/53
1.2.2. Summary of valve actuation
(1) Proportional control of valve opening positions
The programming circuitry detects the deviation of the level between those of an
instrumental signal from a programming controller and a valve operating signal from a
potentiometer, compares these two input signals, determines the valve operation mode
and drives the motor until these two input signals reach the same level.
Comparison of the input signal level and the level preset by Parameter Code 03 (Table
9-1) detects the input signal cutoff. This is a provision available only for DC4~20mA,
DC1~5V or DC2~10V signals. If the input signal becomes lower than the preset level,
the valve operation mode switch on the operation panel of the control terminal board
automatically activates the motor for full closing, stopping or full opening as preset,
while externally generating a warning signal. When the disturbed input signal has been
subsequently restored, the warning signal is cancelled and operation of an actuated
valve returns to the original mode (Fig.1-2).
(1) Excessive repetition of cutoff and restoration of input signals may overheat
the motor, activates the built-in thermal switch and causes the motor drive to
unintentionally stop. To avoid this problem, adjust the signal level so that the
motor may stop only in the case of accidental input signal cutoff, referring to
Section 9.3.2 of this manual
(2) Input signal cutoff may be caused by breaking of entrance cables, contact
failures of electric connections or functional troubles of programming
circuitries. Determine the real causes of such failures to find appropriate
corrective measures.
Fig.1-2 Proportional control of valve opening position
DC4mA DC20mA
20%
DC5V
100
Valve position（%）
Control signal
DC1V
Valve opening range
←Setting level for detecting input signal cutoff
50%
014%
2.8mA
DC10V
DC2V
Preset range to detect input signal cutoff
0% 100%
10mA
2.5V
5V
37.5%
100%
5%
0.7V
1.4V
Warning signal output range for preset 14% opening position

Document No. : KE-4040-01 Page: 7/53
1.3. Appearance diagrams
Fig.1-3 Names of parts and components

Document No. : KE-4040-01 Page: 8/53
30.4
54
206.5 20 132
40
7
201
Room for removing a cover
Room for pulling up a handle
Fig. 1-4 EXCN100/200-2
Exterior appearance and dimensions
Fig. 1-5 EXCN100/200-3
Exterior appearance and dimensions
69
230
45.1 60
158
219.5 7
20
Room for removin
g
a cover Room for pulling up a handle
273
73
245.5
51.3 60
188
7
255
20
Room for removing a cover Room for pulling up a handle
Fig. 1-6 EXCN100/200-4
Exterior a
pp
earance and dimensions
Fig. 1-7 EXCN100/200-5
Exterior a
pp
earance and dimensions
Room for removing a cover
Room for pulling up a handle
73 51.3
245.5 20
188
60
7
255
273

Document No. : KE-4040-01 Page: 9/53
1.4. Terminal board design
(1) Names and arrangements of all indicators, displays, keys, switches and terminals on
the control terminal board are given in Fig.1-8. Their functions are given in Table 1-1.
Description Marking Notes
OPEN indicator (Green LED) OPEN Indicating valve opening operation
CLOSE indicator (Green LED) CLOSE Indicating valve closing operation
Power indicator (Orange LED) POWER Indicating power source turned on
Error indicator (Red LED ) ERROR Warning input signal cutoff
Mode and data display
MENU key MENU
DOWN key ▼DOWN
UP key ▲UP
SET key SET
Initial setting and change of actuation
modes , parameter codes and parameters.
DIP switches
change-over of types of analog input signals
φ 5mm x 20mm AC250V 0.5A glass body fuse
FUSE Standard melting type
Table 1-1 Functions of components on control terminal board
Fig.1-8 Control terminal board
Operation panel