
1.COMMUNICATION FUNCTION CONNECTION CONNECTION B-62714EN/04
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1.1 HARDWARE SPECIFICATIONS
The table below provides the I/O Link-II specifications.
Item Hardware specifications
Topology Bus
Physical layer (cable) Twisted pair cable with shielding(Note)
Transfer rate Maximum cable length
125Kbps 1000m
250 Kbps 800m
500 Kbps 480m
1M bps 240m
Transfer rate
Note 1) The maximum cable length is the
standard value used as field guidance.
Note 2) The transfer rates above are accurate to
an error of within ±0.1%.
Connection method Two-wire/three-wire system, terminal block
Communication
method
Half-duplex, synchronous
Number of slave
stations
31 stations max.
Station addressing
Master station: No number assigned
Slave station: Number from 1 to 1F(H)
Electric
characteristics
Compliant with EIA RS485
Isolation between
cables and stations
Photo-coupler
Coding
Baseband
NRZI (Non Return to Zero Inverted)
0 1 0 1 1 0 0 0 0
NOTE
Recommended cable:
KPEV-S 2P 0.9 mm
2
manufactured by Hitachi Cable
Ltd., or equivalent