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USB Communication Converter
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COM-K Instruction Manual
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.
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.
All precautions described in this manual should be taken to avoid
damage to the instrument or equipment.
CAUTION
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.
RKC is not responsible for any damage and/or injury resulting from
the use of instruments made by imitating this instrument.
Periodic maintenance is req uired for safe and pr oper ope ration of thi s
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.
1. PRODUCT CHECK
Before using this product, check each of the following:
• Model code
• Check that all of the accessories delivered are complete.
• Check that there are no scratch or breakage in external appearance
(case, terminal, etc).
COM–K–
: Loader communication cable (Optional)
N: None
1: W-BV-01 cable (1.5 m) for loader communication
[For square shaped loader port]
3: W-BV-03 cable (1.5 m) for loader communication
[For round shaped loader port]
Accessories
USB cable (1 m) .................................................................1
Instruction Manual (IMR01Z01-E9) ....................................1
The USB device driver can be downloaded from the official
RKC website: http://www.rkcinst.com/english/soft/index.asp
If any of the products are missing, damaged, or if your manual
is incomplete, please contact RKC sales office or the agent.
2. PARTS DESCRIPTION
RS-485/RS-422A communication
USB connector
Display lamp
connecto
ll Rights Reserved, Copyright © 2004, RKC INSTRUMENT INC.
Loader communication
IMR01Z01-E9
For square shaped
loader port
For round shaped
loader port
connector
®
RKC INSTRUMENT INC.
• Display lamp
Loader power * Communication state Lamp state
Supply the power
Power not
supplied
* The power is supplied from the loader communication connector of the
controller (RKC product).
Standby/during data receive A orange lamp turns on
During data send A ora n g e l a mp is f l a s h i n g
Standby/during data receive A green lamp turns on
During data send
A green lamp is
flashing
3. MOUNTING
Mounting Cautions
(1) Use this instrument within the following ambient temperature and
ambient humidity.
• Allowable ambient temperature: −10 to +50 °C
• Allowable ambient humidity: 5 to 95 % RH
(Absolute humidity: MAX. W. C 29.3 g/m
(2) Avoid the following when selecting the mounting location:
• 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 induction noise, static electricity, magnetic fields or noise.
• Direct air flow from an air conditioner.
• Exposure to direct sunlight.
• Excessive heat accumulation.
(3) Mounting consideration
• Install the module 200 mm away from the main power line.
• Ensure at least 50 mm space on top and bottom of the control unit
for maintenance and environmental reasons.
Dimensions
(Unit: mm)
39
(13.4)
70
60
DIN rail Mounting
1. Pull down the mounting bracket at the bottom of the module (A).
Attach the hooks on the top of the module to the DIN rail and push
the lower section into place on the DIN rail (B).
2. Slide the mounting bracket up to secure the module to the DIN rail.
DIN rail
Mounting
bracket
(B) Push
(A) Pull down
Panel Mounting
Mount COM-K directly on the panel with screws which are inserted in
the mounting holes of the top and bottom mounting brackets.
Recommended tightening torque: 0.3 N⋅m (3 kgf⋅cm)
The customer needs to provide the M3 size screws. Select
the screw length that matches the mounting panel.
Mounting
dimensions
(Unit: mm)
39
2-M3
3
dry air at 101.3 kPa)
3.5
48
3.5
28
(C) Locked
60
⎯
⎯
4. WIRING
To prevent electric shock or instrument failure, turn off the
power before connecting or disconnecting the instrument
and peripheral equipment.
Wiring Cautions
• To avoid noise induction, keep communication signal wire away
from instrument power line, load lines and power lines of other
electric equipment.
• If the personal computer is easily affected by noise, use the
ferrite core in the USB cable. For an installation position of a
ferrite core, please refer to the following figure.
Method to connect
(1) For loader communication
Connected to USB
port of a personal
computer
To avoid termination of the loader communication for
some versions of COM-K, do not turn the controller
(FB400/FB900 etc.) ON or OFF during operation by
loader communication.
W-BV-01 loader communication cable:
It is possible to use COM-K when controller is either ON or
OFF. COM-K starts supplying power to the connected
controller being OFF after approximately 2 seconds.
W-BV-03 loader communication cable:
Controller should be always ON to use with COM-K.
Display of controller (RKC pr od uc t) bei n g pow er ed by COM-K
FB series,
RB series etc.
PF900/901 Lights all State monitor lamps: RESET, RUN,
(2) For RS-485/RS-422A communication
The shielded twisted pair wire must be provided by the customer.
Connected to USB
port of a personal
computer
Connected to
RS-485/RS-422A
communication
connector
Connector pin configuration
[RS-485] [RS-422A]
Pin No. Signal name Symbol Pin No. Signal name Symbol
1 Signal ground SG 1 Sign al ground SG
2
Receive data
3
Receive data
4 * Unused ⎯ 4 Receive data R (A)
5 * Unused ⎯ 5 Receive data R (B)
* Do not connect wires to 4 and 5 pins. Malfunction may result.
USB cable
USB cable
Connected to loader
communication
connector
USB cable
Shielded twisted pair wire
Send data/
Send data/
WARNING
!
Ferrite core * (sold separately)
* Recommended ferrite core:
ZCAT2032-0930 (TDK Corporation)
Connected to USB connector
COM-K
Loader communication
cable [Optional]
W-BV-01 or W-BV-03
Connected to loader communication
connector of the controller
Displays “-----” at the PV/SV monitor display.
FIX, MAN, HOLD, STEP.SET and PTN.END.
Other displays and lamps are OFF.
Connected to USB connector
COM-K
RS-485/RS-422A
2 3
1
T/R (A) 2 Send data T (A)
T/R (B) 3 Send data T (B)
Connected to communication
terminals of controller
(Example: FB400/FB900)
RS-485/RS-422A
communication
connector
4
5
:
Connection diagram
1SG
2
3
4
Shielded twisted
5
1SG
2
3
4
5
Controller
(Example: FB400/FB900)
25 SG
26
T/R (A)
T/R (B)
27
Communication terminals
pair wire
R: Termination resistors (Example: 120 Ω1/2 W)
If communication errors occur frequently due to
the operation environment o r t he communi cat io n
distance, connect termination resistors.
Shielded twisted
pair wire
(communication 1 side)
Controller
(Example: FB400/FB900)
25 SG
26
T (A)
27
T (B)
R (A)
28
R (B)
29
Communication terminals
(Communication 1 side)
[RS-485]
COM-K*
T/R (A)
T/R (B)
RS-485/RS-422A
communication
connector
[RS-422A]
COM-K*
T (A)
T (B)
R (A)
R (B)
RS-485/RS-422A
communication
connector
* The termination resistor is built into the COM-K.
Attention in connector wiring
− The lead wires use the stranded wire.
− Use the stranded wire from size 0.25 to 0.5 mm
2
(AWG 26-20).
− Stripping length is as follows.
Conductor cross section:
0.25 to 0.5 mm
8 mm (Stripping length)
2
(AWG 26-20)
Connector type:
FK-MC 0,5/5-ST-2,5
(Products by Phoenix
contact Ltd.)
Installation of USB device driver
Installs an USB device driver in a personal computer before use.
1. Connect COM-K to USB port of a personal computer.
2. Install an USB device driver according to an on screen
instruction.
5. SPECIFICATIONS
USB function
Interface: Based on USB Ver. 2.0
Communication speed: Full speed (12 Mbps)
Connection: Connected by universal USB cable
Power source method: Bus power (The power is supplied from the
Compatible OS:
Communication function
Interface: Based on RS-485, EIA standard
Based on RS-422A, EIA standard
Connection method: 2-wire system,
Synchronous method: Half-duplex start-stop synchronous type
Communication speed: 2400 bps, 4800 bps, 9600 bps, 19200 bps,
Data bit configuration: Start bit: 1
Protocol: Protocol depends on application of the
Number of connecting controllers
Maximum 31 controllers (RS-485, RS-422A)
Termination resistor: Built-in termination resistor (120 Ω)
General specifications
Power supply voltage: 5 V DC ±5 % (Supplied by USB bus cable)
Current consumption: 150 mA max. (Loader communication)
Allowable ambient temperature range:
Allowable ambient humidity range:
Weight: Approx. 40 g
RKC INSTRUMENT INC.
®
HEADQUARTERS: 16-6, KUGAHARA 5-CHOME, OHTA-KU TOKYO 146-8515 JAPAN
PHONE: 03-3751-9799 (+81 3 3751 9799) E-mail: info@rkcinst.co.jp
FAX: 03-3751-8585 (+81 3 3751 8585) JAN. 2011
(Mini-B connector)
USB port on the personal computer side)
Windows XP/2000 Professional/Me/98 Second Edition,
Windows 7 (32-bit, 64-bit)/Vista (32-bit, 64-bit)
half-duplex multi-drop connection (RS-485)
4-wire system,
half-duplex multi-drop connection (RS-422A)
38400 bps
Data bit: 7 or 8
Parity bit: Without, Odd or Even
Stop bit: 1 or 2
personal computer side
60 mA max. (RS-485/RS-422A communication)
−10 to +50 °C
5 to 95 %RH (Non condensing)
Absolute humidity:
MAX.W.C 29.3 g/m
3
dry air at 101.3 kPa
The first edition: DEC. 2004 [IMQ00]
The ninth edition: JAN. 2011 [IMQ00]
R
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