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Appendix AStandard Models
95
CPM1A/CPM2A I/O Link Unit
Model Specifications
CPM1A-SRT21 8 inputs, 8 outputs
Exchanges data with CPM1A/CPM2A CPU Unit.
Note All the above models support both high-speed and long-distance communications modes.
Connection Devices
Communications Cables
Model Specifications
Commercially available VCTF cable (JIS C3306), 0.75 mm
2
x 2 conductors
SCA1-4F10 Special Flat Cable, 100 m, 0.75 mm
2
x 4 conductors
Specified Communications Cables
Model Manufacturer Comments
#9409 Belden USA manufacturer
Note The electrical characteristics of the above cable are the same as those of the following: VCTF cable (JIS
C3306), 0.75 mm
2
x 2 conductors. It can thus be used with the same specifications as the VCTF cable listed
above.
Connectors and Terminal Blocks
Name Model Comments
Branch Crimp Connector SCN1-TH4 Connector used to branch from the main line. Can be used only
on the Special Flat Cable.
Extension Crimp Connector SCN1-TH4E Used to extend the Special Flat Cable.
Terminating Resistor Crimp
Connector
SCN1-TH4T A connector equipped with terminating resistance. Can be used
only on the Special Flat Cable.
Terminal-block Terminator SRT1-T A terminal block equipped with terminating resistance. Can be
used either on the Special Flat Cable or VCTF cable.
SRM1 RS-232C Port Connecting Cable
Model Name Specifications
CQM1-CIF02 Peripheral Port Conversion Cable For connecting IBM PC/AT compatible
computers. (Cable length: 3.3 m)
RS-422 Adapter
Model Name Specifications
CPM1-CIF11 RS-422 Adapter For level conversion between the
Peripheral Port and RS-422
Link Adapters
Model Name Specifications
NT-AL001 Link Adapter One RS-232C connector and one
RS-422 terminal block.
Power supply: 5 VDC; 150 mA