COMMUNICATION LEVEL CONVERTER FOR
RS-232C/RS-422A(RS-485)
COM-103C
INSTRUCTION MANUAL
IMCOM04-E3
Thank you for purchasing this
COM-103C
. Before using this
product, please carefully read this manual for its correct use. In
addition, after reading the manual keep it available easily
anytime.
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Wiring precautions
•
If failure or error of this instrument could result in a critical
accident of the system, install an external protection circuit
toprevent such an accident.
•
In order to prevent instrument damage or failure, protect the
power line and the input/output lines from high currents by
using fuses with appropriate ratings.
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Power supply
•
In order to prevent instrument damage or failure, supply
power of the specified rating.
•
In order to prevent electric shock or instrument failure, do
not turn on the power supply until all of the wiring is
completed.
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Installation environment
In order to prevent fire, explosion or instrument damage,
never use this instrument at a location where inflammable or
explosive gases or vapour exist.
z
z
z
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Never touch the inside of the instrument.
In order to prevent electric shock or burns, never touch the
inside of the instrument. Only RKC service engineers can
touch the inside of the instrument to check the circuit or to
replace parts. High voltage and high temperature sections
inside the instrument are extremely dangerous.
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Never modify the instrument.
In order to prevent accident or instrument failure, never modify
the instrument.
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Maintenance
•
In order to prevent electric shock, burns or instrument
failure, only RKC service engineers may replace parts.
•
In order to use this instrument continuously and safely,
conduct periodic maintenance. Some parts used in this
instrument have a limited service life and may deteriorate
with time.
1. NAME OF PARTS AND TERMINALS
R
S
-232C
1
A
B
COM-103C
2
3
4
5
6
7
8
9
2. MOUNTING
2.1 Mounting cautions
Avoid the following when selecting the mounting location.
z
Ambient temperature of less than 0
°
C (32
°
F) or more than 50
°
C
(122
°
F).
z
Ambient humidity of less than 45 % or more than 85 % RH.
z
Rapid changes in ambient temperature which may cause
condensation.
z
Corrosive or inflammable gases.
z
Direct vibration or shock to the mainframe.
z
Water, oil, chemicals, vapor or steam splashes.
z
Excessive dust, salt or iron particles.
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Excessive induction noise, static electricity, magnetic fields or noise.
z
Direct air flow from an air conditioner.
z
Should be used indoors where the system is not exposed to direct
sunlight.
z
Heat to be accumulated radiation heat.
2.2 Mounting method
Rack mounting type (COM-103C-R)
c
Make cutouts in the panel corresponding to the number of
converters to be mounted by referring to panel cutout dimensions.
d
Insert the converter into the cutout from the panel front.
e
Using a Phillips screwdriver, secure the converter from the terminal
side with 2 setscrews (M4
×
6 SEMS pan-head screw).
Screws provided by customer.
32(1.26)
21
(0.83)
89(3.50)
2-M4
210
(8.
27
)
198
(7.
80
)
181.
8
(7.
16
)
198
±
0.
2
( 7.
795
±
0.
007
)
182.
5
+
0.
3
0
( 7.
185
+
0.
011
0
)
φ
4.2(0.17)
32.5
+
0.2
0
( 1.280
0
+
0.007
)
[[[[
unit
::::
m m (inch)
]]]]
Panel cutout
Dim ensions
Wall mounting type (COM-103C-W)
c
Drill holes corresponding to the number of converters to be
mountedby referring to panel cutout dimensions.
d
Using a Phillips screwdriver, secure the converter from the
terminalside with 2 setscrews (M4
×
6 SEMS pan-head screw).
Screws provided by customer.
32(1.26)
111(4.37)
90(3.54)
2-M4
210(
8.
27)
198(
7.
80)
181.
8(
7.
16)
198
±
0.
2
( 7.
79
5
±
0.
007
)
φ
4.2(0.17)
[[[[
unit
::::
m m (inch)
]]]]
Panel cutout
Dim ensions
3. WIRING
3.1 Cautions for wiring
(1) Conduct input signal wiring away from instrument power,
electricequipment power and load lines to avoid noise induction.
(2) For power supply wires, use twisted wires with low voltage drop.
(3) Do not excessively tighten the terminal screws. In addition, use the
solderless terminal appropriate to the screw size. (Screw size:
M3
×
6, recommended tightening torque: 0.5 N
x
m [5 kgf
x
cm])
WARNING
Name of parts
A
: Power lamp
B
: Connector for RS-232C Interface
Terminals
Terminals
Contents
1
2
3
SG Communication
terminals
T/R(A) RS-422A or RS-485
T/R(B)
4
5
6
Unused
7
8
Power supply voltage terminals
90 to 264 V AC
9
Ground terminal
SG :
Signal Ground
T/R(A) : Transmission Terminal (A)
T/R(B) : Transmission Terminal (B)
