Instruction manual

3. WIRING
IMCB14-E1
4



Connection to the RS-485 port of the master
The master has a built-in circuit to transfer send/receive data alternatively.
SG
T/R
(
B
)
T/R
(
A
)
SG
T/R
(
B
)
T/R
(
A
)
RD
(
RXD
)
：
Receive data
SD
(
TXD
)
：
Send data
Master
RS-485
SG
T/R
(
B
)
T/R
(
A
)
y
y
y
(
31 max.
)
Paired wire
Send/Receive
transfer signal
Shielded twisted
pair wire
Use a terminal resistor with a combined resistance of 100
:
on the last controller.
Slave
SD (TXD) and RD (RXD): Negative logic
Slave



Connection to the RS-232C port of the master
A RS-232C/RS-485 communication converter is requited.
Slave
SG
T/R(B)
T/R(A)
RS-485
SG
T/R(A)
T/R(B)
RS-232C
Master
RS-232C/RS-485
converter
Shielded twisted
pair wire
Paired wire
Use a terminal resistor with a combined resistance of 100
:
on the last controller.
When the master uses Windows 95/NT, use a RS-232C/RS-485 converter with an automatic
send/receive transfer function.
Recommended: CD485, CD485/V manufactured by Data Link, Inc. or equivalent.