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2
SERIAL COMMUNICATION MODULE REPLACEMENT
2.2.2 Cable specifications comparison
(1) Between AnS series and L series
Item
Cable
Cable length
Applicable
RS-232
connector for
external wiring
(module side)
Cable
RS-422/485
Cable length
External wiring
(module side)
*1
The RS-232 and RS-422/485 recommended cables are specified in the MELSEC-L Serial Communication Module User's
Manual (Basic).
*2
For the connector shell of the cable connected to the L series serial communication module, use the exclusive products
listed in the MELSEC-L Serial Communication Module User's Manual (Basic).
Specifications
AnS series
A1SJ71UC24-R2
A1SJ71UC24-R4
Use a cable that is compliant with the RS-232 standard.
Max. 15m
9-pin D-sub
(male, screw type)
Item
Cable type
Number of pairs
Conductor resistance (20
)
Insulation resistance
10000 M -km or higher
Dielectric withstand voltage
Electrostatic capacitance (1kHz)
Average 60nF/km or less
Characteristic impedance
(100kHz)
Max. 500m (overall distance)
Max. 1200m (overall distance)
Connected to terminal block
: Compatible,
: Partial change required, ×: Incompatible
L series
Compatibility
LJ71C24
LJ71C24-R2
*1
*2
9-pin D-sub
(male, screw type)
*1
Description
Shielded cable
3P
88.0 /km or less
500VDC for 1 minute
110 10
Precautions for
replacement
For details on the
connection method,
refer to the manual for
the module used.
2
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