4. WIRING
IMR02E20-E1
18
4.4.2 When connected with RS-485
Pin layout of connector
COM-M
L
FAIL/RU
LO
AD
ER
RX/TX
MS
NS
M
O
DB
U
S
/T
CP
COM-ML
COM.PORT
Modular connector
pin number
6: SG
5: Unused
4: Unused
3: SG
2: T/R (B)
1: T/R (A)
Connector pin number and signal details
Pin No.
Signal name
Symbol
1
Send/Receive data
T/R (A)
2
Send/Receive data
T/R (B)
3
Signal ground
SG
4
Unused
5
Unused
6
Signal ground
SG
Wiring
Shielded twisted
pair wire
Paired wire
RS-485
R1
Host computer
SG
T/R (B)
T/R (A)
R1: Termination resistor
[Host computer side]
(Example:
120
1/2 W)
COM-ML (COM. PORT)
1
2
3
4
5
6
T/R (A)
T/R (B)
SG
Unused
Unused
SG
(
)
(
)
(
)
(
)
If communication errors occur frequently due to the operation environment or the
communication distance, connect termination resistors to the host computer side.
Up to 16 SRZ units can be connected to a host computer communication port.
The 6-pin type modular connector
should be used for the connection
to the COM-ML.
Recommended model: TM4P-66P
(Manufactured by HIROSE
ELECTRIC CO., LTD.)
