RKC REX-AC410 Instruction Manual
Digital Alarm Indicator
REX-AC110/AC410
Instruction Manual
IM41AC01-E4
Thank you for purchasing the RKC instrument. In order to achieve
maximum performance and ensure proper operation of your new
instrument, carefully read all the instructions in this manual.
Please place this manual in a convenient location for easy reference.
SYMBOLS
WARNING
This mark indicates precautions that must be taken if there is
danger of electric shock, fire, etc., which could result in loss of
life or injury.
CAUTION
This mark indicates that if these precautions and operating
procedures are not taken, damage to the instrument may
result.
NOTE
Extra notes or precautions are added to operating procedures
and explanations.
：
：
＊
:
:
:
This mark indicates that all precautions should be
taken for safe usage.
This mark is used to add extra notes, precautions
or supplementary explanations to table and figures.
CAUTION
●
This is a Class A instrument. In a domestic environment, this
instrument may cause radio interference, in which case the user
may be required to take adequate measures.
●
This instrument is protected from electric shock by reinforced
insulation. Provide reinforced insulation between the wire for the
input signal and the wires for instrument power supply, source of
power and loads.
●
This instrument is designed for installation in an enclosed
instrumentation panel. All high-voltage connections such as
power supply terminals must be enclosed in the instrumentation
panel to avoid electric shock by operating personnel.
●
All precautions described in this manual should be taken to avoid
damage to the instrument or equipment.
●
All wiring must be in accordance with local codes and regulations.
●
To prevent instrument damage or failure, protect the power line
and the input/output lines from high currents with a protection
device such as fuse, circuit breaker, etc.
●
Prevent metal fragments or lead wire scraps from falling inside
instrument case to avoid electric shock, fire or malfunction.
●
Tighten each terminal screw to the specified torque found in the
manual to avoid electric shock, fire or malfunction.
●
For proper operation of this instrument, provide adequate
ventilation for heat dispensation.
●
Do not connect wires to unused terminals as this will interfere
with proper operation of the instrument.
●
Turn off the power supply before cleaning the instrument.
●
Do not use a volatile solvent such as paint thinner to clean the
instrument. Deformation or discoloration will occur. Use a soft,
dry cloth to remove stains from the instrument.
●
To avoid damage to instrument display, do not rub with an
abrasive material or push front panel with a hard object.
WARNING
An external protection device must be installed if failure of this
●
instrument could result in damage to the instrument, equipment
or injury to personnel.
All wiring must be completed before power is turned on to
●
prevent electric shock, fire or damage to instrument and
equipment.
This instrument must be used in accordance with the
●
specifictions to prevent fire or damage to instrument and
equipment.
This instrument is not intended for use in locations subject to
●
flammable or explosive gases.
Do not touch high-voltage connections such as power supply
●
terminals, etc. to avoid electric shock.
RKC is not responsible if this instrument is repaired, modified
●
or disassembled by other than factory-approved personnel.
Malfunction can occur and warranty is void under these
conditions.
All Rights Reserved, Cop yright 1996, RKC INSTRUMENT INC.
NOTICE
●
This manual assumes that the reader has a fundamental
knowledge of the principles of electricity, process control, computer
technology and communications.
●
The figures, diagrams and numeric values used in this manual are
only for purpose of illustration.
●
RKC is not responsible for any damage or injury that is caused as
a result of using this instrument, instrument failure or indirect
damage.
●
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 accuracy of the information. The information
in this manual is subject to change without prior notice.
●
No portion of this document 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.
IM41AC01-E4
1
1. PRODUCT CHECK
Check whether the delivered product is as specified by referring to the following model code list.
Model code
④
First Alarm [ALM1]
REX-AC110 N
□□□－□ □□□
＊
① ② ③ ④⑤⑥
REX-AC410
□□□－□ □□□□
＊
① ② ③ ④⑤⑥⑦
No first alarm
Process high alarm *1
Process low alarm *1
Process high alarm *2
Process low alarm *2
⑥
Third Alarm [ALM3]
No third alarm
Process high alarm *1
Process low alarm *1
Process high alarm *2
Process low alarm *2
⑤
Second Alarm [ALM2]
①
Input type
8. INPUT RANGE TABLE
See .
②
Input range
8. INPUT RANGE TABLE
See .
③
Power supply type
24 V AC/DC 100 to 240 V AC *1 : Without hold action
■
Accessories:
Mounting brackets (2 pieces), Instruction Manual [IM41AC01-E4] (1 copy)
No second alarm
Process high alarm *1
Process low alarm *1
Process high alarm *2
Process low alarm *2
⑦
Fourth Alarm [ALM4]*
No fourth alarm
Process high alarm *1
Process low alarm *1
Process high alarm *2
Process low alarm *2
*Fourth alarm is not provided for
REX-AC110.
*2:Withholdaction
2. MOUNTING
WARNING
To prevent electric shock or instrument failure, always turn off the power before mounting or removing
the instrument.
Cautions for mounting Dimensions
■■
(1) This instrument is intended to be used under the following
environmental conditions. (IEC61010-1)
[OVERVOLTAGE CATEGORY II, POLLUTION DEGREE 2]
(2) Avoid the following when selecting the mounting location.
●
Ambient temperature of less than 0 or more than 50 .
●
Ambient humidity of less than 45 % or more than 85 % RH.
●
Rapid changes in ambient temperature which may cause
condensation.
●
Corrosive or inflammable gases.
●
Direct vibration or shock to the mainframe.
●
Water, oil, chemicals, vapor or steam splashes.
●
Excessive dust, salt or iron particles.
●
Excessive induction noise, static electricity, magnetic fields
or noise.
●
Direct air flow from an air conditioner.
●
Exposure to direct sunlight.
●
Excessive heat accumulation.
<REX-AC110>
<REX-AC410>
2
IM41AC01-E4
Mounting procedures■
REX-AC110●
<When the instruments are mounted on panel with 1 to 5 mm in thickness>
Since the mounting brackets are already installed on the instrument, insert the instrument
into the panel front without removal of the brackets.
<When the instruments are mounted on panel with 5 to 9 mm in thickness>
Remove the mounting brackets from the instrument with a slotted screwdriver.
Engage each mounting bracket with holes marked with "5-9" on the housing and
then insert the instrument through from the panel cutout.
REX-AC410●
①
Prepare the panel cutout as specified in Dimensions.
②
Insert the instrument through the panel cutout.
③
Insert an upper mounting bracket along the bracket
insertion groove from the back, and then engage a projection
at the bracket end with a recess at the groove front and also
insert metal fitting legs into slots.
④
Tighten a bracket setscrew from the rear of the bracket with
Phillips screwdriver. Do not overtighten the bracket setscrew.
⑤
The other mounting bracket should be installed in the same
way described in and .
③④
3. WIRING
WARNING
To prevent electric shock or instrument failure, do not turn on the power until all the wiring is completed.
Cautions for wiring■
(1) For thermocouple input, use the specified compensation wire.
(2) For RTD input, use low resistance lead wire with no difference in resistance between the three lead wires.
(3) To avoid noise induction, keep input signal wire away from instrument power line, load lines and power lines of other electric equipment.
(4) If there is electrical noise in the vicinity of the instrument that could affect operation, use a noise filter.
・
Shorten the distance between the twisted power supply wire pitches to achieve the most effective noise reduction.
・
Always install the noise filter on a grounded panel. Minimize the wiring distance between the noise filter output and the instrument power
supply terminals to achieve the most effective noise reduction.
・
Do not connect fuses or switches to the noise filter output
wiring as this will reduce the effectiveness of the noise filter.
(5) Power supply wiring must be twisted and have a low voltage
drop.
(6) About five or six seconds are required as preparation time for
contact output every time the instrument is turned on.
Use a delay relay when the output line is used for an external
interlock circuit.
(7) This instrument is not furnished with a power supply switch or fuse. Therefore, if a fuse or power supply switch is required, install close to
the instrument.
[Recommended fuse rating: Rated voltage 250 V, Rated current 1 A Fuse type: Time-lag fuse]
(8) Do not excessively tighten the terminal screws. In addition, use the solderless terminal appropriate to the screw size.
(Screw size : M3x6, recommended tightening torque : 0.4 N·m [4 kgf·cm])
(9) For an instrument with 24V power supply, supply power from a SELV circuit.
IM41AC01-E4
3
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