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®

RKC INSTRUMENT INC.

All Rights Reserved, Copyright 

 2015, RKC INSTRUMENT INC.

 

USB Communication Converter 

COM-K2 

Instruction Manual

 

IMR01Z02-E1

 

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 additional measures. 

 All precautions described in this manual should be taken to avoid 

damage to the instrument or equipment. 

 

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 explanation purpose.   

 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 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. 

 

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–K2– 

 

:

 

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] 

 
 
 

 
 
 
 

 

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 

 

USB connector 

RS-485/RS-422A communication 

connector 

Display lamp

Loader communication

connector 

 

 Display lamp 

Loader power *

Communication state 

Lamp state

Supply the power

Standby/during data receive 

A orange lamp turns on

During data send 

A orange lamp is flashing

Power not 

supplied 

Standby/during data receive 

A green lamp turns on

During data send 

A green lamp is 

flashing 

* The power is supplied from the loader communication connector of the 

controller (RKC product). 

 

3. MOUNTING 

 

Mounting Cautions 

(1) Use this instrument within the following ambient temperature and 

ambient humidity. 

  Allowable ambient temperature: 

10 to 

50 

  Allowable ambient humidity:   

5 to 95 %RH   

(Absolute humidity: MAX. W. C 29.3 g/m

3

 dry air at 101.3 kPa) 

(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 operating environment. 

 

 

Dimensions 

70

 

3.5

60

 

28

φ

3.5

(Unit: mm)

48

 

39

 

(13.4)

 

 

 

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. 

 

(C) Locked 

(B) Push 

Mounting 

bracket

DIN rail

(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. 

 

 

 

 
 
 
 
 
 

CAUTION 

Mounting 

dimensions

60 

2-M3

39 

(Unit: mm)

USB cable (1 m) ................................................................. 1 
Instruction Manual (IMR01Z02-E1) .................................... 1

 

Accessories

 

For square shaped 
loader port

 

For round shaped 
loader port

 

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