φ
3.
2(
0.
13)
φ
3.
2(
0.
13)
φ
4.3
(0.17)
11.3(0.44)
Unit: mm (inch)
9.0
(0.35)
18.6
(0.73)
Ring type
solderless terminal
4.3(0.17)
Spade type
solderless terminal
7.
2
(0.
28
)
7.
4
(0
.29)
φ
6.
6 (
0.2
6)
(4) This instrument has no power supply switch nor fuses. Therefore,
install the fuse close to the instrument and the switch, if required.
Fuse type :
Time-lag fuse
Recommended fuse rating : Rated voltage : 250 V
Rated current : 1 A
(5) Conduct instrument power wiring so as not to be influenced by
noise from the electric equipment power. If the instrument may be
affected by external noise, a noise filter should be used.
y
Shorten the distance between twisted power supply wire pitches.
The shorter the distance between the pitches, the more effective for
noise reduction.
y
Install the noise filter on the panel which is always grounded and
minimize the wiring distance between the noise filter output side
and the instrument power terminals.
OUT
Minimize
distance
power
terminals
IN
Twist these leadwires
Shorten distance between
pitches
Instrument power
Noise filter
y
Do not install fuses and/or switches on the filter output signal since
this may lessen filter effect.
3.2 Solderless terminal
Space of fitting a solderless terminal is 7.4 mm
×
11.3 mm. Therefore,
use the solderless terminal suitable for a screw of M3. A free terminal
screw of M3
×
6 is used.
When the instrument is installed in a location where much
vibration and shock exist, use ring type compression lugs,
since spade type compression lugs may be desconnected from
the terminals.
4. CONNECTION
4.1 Connection method
This device supports communications between the RS-232C and RS-
422A or RS-485 interfaces.
■
Connection procedure of host computer
Host computer and COM-103C are connected by a cable for RS-
232C (Using the connector).
c
Loosen the plug case screws, connect the cable core wires to the
relevant connector pins, and mate the plug case with the wired
connector before tightening the screws with a screwdriver.
d
Plug the communication connector connected with the cable
c
into
the instrument connector (See the terminal plate diagram.)
e
Then, using a screwdriver, secure the connector with 2 upper and
lower screws.
Communication cable for RS-232C
Host Computer
COM-103C
SD
RD
RS
CS
SG
SG
CS
RS
RD
SD
2
3
4
5
7
2
3
4
5
7
Accessories
Connector
…
HDBB-25P
(Hirose Electric Co., Ltd. or equivalent)
Plug case
…
HDB-CTF (
Hirose Electric Co., Ltd. or equivalent
)
■
Connection procedure of controller
COM-103C and controller are connected by a twisted pair wire
(shielded). (Using the terminals #1, #2, #3 of COM-103C.)
The twisted pair wire should be prepared by the user.
For details of connection procedure, see the communications
instruction manual for using RKC
′
s controller.
R K C
′
s
c o ntro lle r
R S -42 2 A or R S -4 85
S G
T/R (A )
T/R (B )
Tw is ted p air w ire
(w ith s hie ld)
C O M -1 03 C
R S -23 2 C
Tw is ted p air w ire
(w ith s hie ld)
H o s t C o m pu te r
1
2
3
9
S G
F G
T/R (A )
T/R (B )
*R
*R : U s e a term ina l res is to r w ith a c o m b ine d re s is tan c e o f m o re th an 1 00
Ω
.
P a ire d w ire
4.2 Multidrop connection example
If branched with our instrument BRA-100B, the transmission distance
between COM-103C and BRA-100B may be extended to some degree
and multidrop connection becomes possible. The number of controllers
that can be connected depends on the controller being used.
For details of RKC
′
s BRA-100B, see the instruction manual.
Host Computer
RS-232C
COM-103C
BRA-100B
BRA-100B
BRA-100B
RS-422A or RS-485
RKC
′
s
controller
RKC
′
s
controller
RKC
′
s
controller
RKC
′
s
controller
1
4
2
3
1
4
2
3
3
2
1
4
3
1
2
4
29
30
31
4.3 Internal Connection
R S -23 2C
H os t C o m p uter
C O M -1 03 C
S D
R D
R S
C S
S G
3
2
5
7
R D
S D
C S
S G
T /R (A )
(te rm ina l N o.2)
T /R (B )
(te rm ina l N o.3)
S G
(te rm ina l N o.1)
R S -42 2A
or
R S -48 5
*
*ON : Output the data of RS-232C side to RS-422A (RS-485) side.
OFF : Output the date of
RS-422A (RS-485) side to RS-232C side.
CAUTION
HEADQUARTERS: 16-6, KUGAHARA 5-CHOME, OHTA-KU TOKYO 146-8515 JAPAN
PHONE
IMCOM04-E3
JUN.1999
FAX
: 03-3751-9799 (+81 3 3751 9799)
: 03-3751-8585 (+81 3 3751 8585)
RKC INSTRUMENT INC.
