R
R
)
-
(2) Notes on load
a) Load with small current or sensitive load sometimes
disables off-function as the product maintains
on-condition resulting from off st ate leakage current. In
such cases, connect shunt resistance (Rp) to be parallel
with load and reduce off state leakage current applied
on the load.
Shunt resistance (Rp) <
I
× RL
ILEK I
IR: Load off current RL: Load impedance
ILEK: Off state leakage current
b) The product is designed for the purpose of co ntrolling
resistance load. If the load has larger inductance,
current phase delays comparing to voltage and may
cause disoperation when changing the current flow.
Please allow your time to pre-check the function.
(3) Operation
a) The product controls output proportional to the input
rating (4 to 20 mA DC) by adopting zero-cross control
system.
The product is available for use without analog input by
applying external vol ume a djuste r.
b) The Ramp-up/Ramp-down (Soft start) function can be
used to suppress rapid change in output voltage by
changing the output slowly in cas e of a rapid change in
the output due to input signal ch anges.
・Ramp
up time and Ramp-down time (Soft start)
Ramp-up time Ramp-down time
100%
Output
Input signal
* The length Ramp-up and Ramp-down time is the same.
(4) Others
Do not connect products in series to raise strength or in
parallel to raise the current volume.
SPECIFICATIONS
1. Ratings
Item SSNZ-15F SSNZ-25F
Maximum Input Current 24 mA DC
Max. Load Voltage 264 V AC rms
Max. Load Current 15 A AC rms 25 A AC rms
1 Cycle Surge Current 146 A 250 A
Isolation Resistance
Dielectric Strength 2500 V AC rms/1 min *
Ambient Temperature
Storage Temperature
* Input (, ), Ext. Volume (, ) Output (, ),
Power Source () Between Cases
100 M and above (500 V DC) *
20 to 60 C
(No Icing and Condensation)
30 to 70 C
(No Icing and Condensation)
2. Electrical Characteristics (Ta = 25C)
Item SSNZ-15F SSNZ-25F
Input Impedance 250 ± 20 %
Input Current Range 4 to 20 mA DC
Load Voltage Range 85 to 264 V AC rms (Sine wave)
Load Current Range
On State Voltage Drop Below 1.5 V AC rms
Off State Leakage Current Below 9 mA AC rms
Power Adjustment Range 0 to 100 %
Output power accuracy Setting power ± 10 %
Load Voltage Frequency
Range
Current
Consumption
()
Responding Time Belo w 1 cy cle wi th ou t So ft st ar t * 2
Ramp-up/ Ram p- down Ti me Approx 0.5 to 40 seconds *2
Weight Approx. 260 g
Standard UL508 category No. NRNT2
*1 Conduction angle tend to be narrower when the load wi th minu te
current applied. Please allow your time to pre-check the function.
*2 The front volume adjuster reach MAX when turned clockwise and
reach ZERO when turned counter-clockwise.
The ratings of approx.0.5 to 40 sec. shows changing tim e of the
power from 0 % 100 % or 100 % 0 %.
Analog Input
Ext. volume
100 mA AC rms to max. load current * 1
(at max. output power)
(load voltage 200 V AC rms, 60 Hz)
50 Hz/60 Hz Auto-change
47 to 53 Hz/57 to 63 Hz
5.1 mA AC rms
(100 V AC rms, 50 Hz)
7.0 mA AC rms
(100 V AC rms, 50 Hz)
3. Input current vs. Output power
100
80
60
40
20
Output power source(%)
0
0
4
SSNZ series
812162024
Input current（mA）
100％
4. Load mitigation
HEADQUARTERS:16-6, KUGAHARA 5-CHOME, OHTA-KU
TOKYO 146-8515 JAPAN
PHONE:03-3751-9799 (+81 3 3751 9799)
WEBSITE: http://www.r kcinst .com
30
SSNZ-25F
25
Load current (A
21
20
18.2
12
11.5
SSNZ-15F
15
10
5
0
－
20 0 20 40
When three-units adhered
When eight-units adhered
The first edition: MAR. 2005 [IMQ00]
The seventh edition: JUN. 2015 [IMQ00]
RKC INSTRUMENT INC.
35
60
Ambient temperature（℃）→
Single Phase Power Controller
Zero-cross Control Type
SSNZ-15F/SSNZ-25F
RKC INSTRUMENT INC. IMR02A02-E7
Thank you for purchasing this RKC product.
In order to achieve maximum performance and ensure
proper operation of your new instrument, carefully read all
the instructions in this manual.
Please place the manual in a convenient location for easy
reference.
The instruction manual is intende d for those who have the
knowledge on electronic de vice s.
★ SYMBOLS
WARNING
CAUTION
1. Risk of electric shock
● Power sou rce should b e d isconnected w hen w iring.
● The te rmin al cover should be attached whenever it i s
operating.
● Do not remove the outer case.
● Do not touch the prod uct when opera ting.
● Do not touch the terminal immediately after it is
switched off. It may cause an electric shock by
electricity charged in the condenser.
2. Risk of fire or fire burn
● Do not touch the heat sink while on operation or
immediately after it is switched off.
● Do not use the product near inflammable gas or
explosive gas.
● Keep combustibles away from the product.
● Apply fuse or breaker for safety reason in order to
prevent overcurrent, short circuit, or breakdown.
● Wiring to terminals must be screwed with adequate
torque. (It may cause excessive heat generation on
terminals.)
3. Others
● Use the unit within the specified ratings.
● Do not drop the product on any of your body parts.
IMR02A02-E7 JUN. 2015
User's Manual
SAFETY INSTRUCTION
Incorrect application may
result in fire or potential
hazard to human body.
Incorrect application may
result in damage to the unit
or other equipment.
WARNING
®
The following accessories may be available from us.
External Volume
(Complete with Volume, Scale plate and Knob.)
Rapid blow fuse
For 15 A
For 25 A
Fuse holder * HK1038UL
Fuse holder cover * HC10
* Same fuse holder/cover for 15 A, 25 A
Accessories Model code
NPZP-S01
Rapid blow fuse
Fuse holder
660CF15UL
660CF25UL
CAUTION
● Do not soak the product in water, wash ing liquid or
chemicals.
● Do not put any metallic particles or conducting
materials inside the product.
● Do not overhaul or remodel them.
● Use correct size of wires according to the current.
● Do not drop the product, give vibration or physical
shock.
● Use the power source within the rated frequency
range.
● U sing the product under t he following condition ma y
cause failure, malfunction or degradation.
・Exposed to water, oil or chemicals.
・Exposed to corrosive gas.
・In the high heat or high humid ity.
・Exposed to dust or metal po wders.
● As the product self-heats while on operation, heat
sink is attached as a radiato r. If the heat convection
is obstructed by surrounding equipment and parts, it
will lead to possible cause of fire or damage by
excessive heat generation.
● Check the polarity of wires and apply adequate
voltage.
● The load should be within the rated range.
t
o
(
)
(Typ
)
(
)
k
o
NOTICE
● The figures, diagrams and numeric values used in this
manual are only for purpose of illu stration .
● RKC is not responsible for any damage or injury that is
caused as a result of using this instrument, instrument
failure or indirect damage.
●RKC is not responsible for any damage and/or injury
resulting from the use of instruments made by imitating
this instrumen t.
● Periodic maintenance is required for safe and proper
operation of this instrument. Some components have a
limited service life, or characteristics that change over
time.
● Every effort has been made to ensure accuracy of all
information contained herein. RKC makes no warranty
expressed or implied, with respect to the accura cy of the
information. The information i n this manual is subject to
change without prior notice.
● No portion of this docum ent may be reprinted, modified,
copied, transmitted, digitized, stored, processed or
retrieved through any mechanical, electronic, optical or
other means without prior written approval from RKC.
● Check specifications or any stan dar ds if it co nforms t o the
product when used with other equipment. We are not
responsible for the item's conformity if the
pre-confirmation is not carried out.
● W hen using the pro duct with the follo wing application, do
not apply the maximum ratings on the item and take
safety measures in advance in order to minimize the
damage to the product.
a) When using outside, using under the condition with
potential damage by chemicals or electric obstruct ion or
under the condition not specified in the instruction manual
or specifications.
b) Any facilities of nuclear power control, incineration,
railways, airways, vehicles, medical devices, safety
devices and the facilities regulated by administrative
organ or private sectors.
c) Any system or machinery which may endanger person or
property.
d) Any facilities which requires high reliability such as the
suppliers of gas, electricity and water or the system
continuously operating 24 hours.
e) Any other application when an advanced security is
required.
HOW TO MOUNT
1. Dimensions and Mounting
This product can be mounted on a DIN-rail and the w all of a panel.
(1) Dimensions
(2) Panel Processing
(3) Torque rate against panel
(4) Mounting direction
・Vertical direction ・Horizontal direction
91
86.6
128.5
136.5
(Unit：mm）
6-φ4.6
or M4
10.8±0.3
22.0
Protective cover
21.5
φ4.6
M3.5×6
Ramp-up/
Ramp-down
(soft start)
set up volume
2-M4×8
3-φ4.6
or M4
90±0.3 60
10.8
When mounting the product onto the panel, the
tightening torque should be 1.18 to 1.47 N･m.
Panel
Panel
The load current should be below
70 % of the specified ratings.
(Unit：mm)
φ4.6
78
φ4.6×5.6
90
2. Regarding Wiring and Connection
When a load is not connected rightly, a fault may be
happened. Please connect the load according to the
connection example.
(1) Example of connection with temperature controller
Temperature
100
controller
＋
4 to
20 mA DC
－
⑦
L2
1
2
(2) Example connection adopting external volume
(Manual setting)
Numbers printed in white on a
dark circle are terminal numbers of
ext. volume (potentiometer).
e: NPZP-S01
* Please purchase ext. volume (potentiomet er), rapid blo w fuse
and fuse holder separately (sold separately).
* When used with a temperature controller, this ext. volume
cannot be used as “(Gradient setting).”
: Input terminal (1+) : Input terminal (2-)
: Ext. Volume terminal (3) : Ext. Volume terminal (4)
: Output ter mina l (T1) : Output ter mina l (L1 )
: Power terminal (L2)
Ext. volume
L2
3
3
2
4
1
2
Input impedance of the product is 250 (ohm). Ext. Volume
terminal () out puts 5 V, therefore, the input voltage of the
product is;
5 V × 250 /(Resistance on ext. volume + 250 )
Choose the ratings of the exte rnal vo lume in c ompli ance w ith
the amount of electric power adjustments.
The volume is available as an optional part from us.
(3) Input wiring
a) Wire size
・Single wire: 0.14 to 0.5 mm
・Stranded wire: 0.14 to 0.5 mm
・AWG: 20 to 26
T1
L1
T1
L1
2
2
Heater
Load
⑤
①
②
③
Input signal
indication lamp
④
⑥
Heater
Load
Load
Load
Input signal
indication lamp
85 t
264 V AC
Rapid blow
fuse
85 t
264 V AC
Rapid blow
fuse
～
～
b) Processing of the tip
Wire
11
c) How to insert
No soldering or
it causes wire breaks
3-2.54
Connecter
（Orange）
Wire
Precision driver or other tools
with pointed tip
Connecter
（Orange）
Insert the connector lever as in the illustration and insert
the power cord. If the power cord is pushed in coercively
without placing the lever, it may bec ome the cause of
bad contact or disconnection.
(4) Output wiring
a) Ring terminals
Terminal No. Item
/ Output terminal (T1/L1) Below 9.5 mm Above 4.3 mm
Power terminal (L2) Below 6.5 mm Above 3.7 mm
b) Screw torque
Ter mi na l N o. Item Max. rate Recommendation
/ Output terminal (T1/L1)
Power terminal (L2)
φ
φ
1.47 N･m 1.18 to 1.37 N･m
0.78 N･m 0.64 to 0.74 N･m
3. Notes on electric circuit design
(1) Protective circuit on output side
a) The product is composed of semi-conductor elements
and there is a possibility that the unit fails due t o surge
voltage and overcurrent. Failures are generally caused
by short circuit and it becomes uncontrollable when load
is at on state. It is, therefore, more secured to u se the
product with breaker or contactor as the protective
circuit.
b) Output element damages if output side has short-current
or overcurrent.
Appl y rapid b low fus e within t he foll owing r ange on l oad
circuit.
Isurge > Iff > Ir
Isurge: 1 cycle surge on current
Iff: Fusing current of rapid blow fuse
Ir: Inrush current of load
A
（Uni
：mm）
（TOP VIEW)
（SIDE VIEW)
B
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