YOKOGAWA Vnet/IP, Technical Information

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4. Appendix
4-2
TI 30A10A05-01E
4.3 Cable for Vnet/IP
n
Interface specifications
Both 100BASE-TX and 1000BASE-T interfaces use UTP cables. The 1000BASE-LX interface
uses optical fiber cables.
The following table shows the relationship between Vnet/IP connection interface standards and
their maximum transmission distance.
Table Connection interface for Vnet/IP devices
Connection Interface standard Transmission speed
Maximum transmission
distance
Between Vnet/IP station
and Layer 2 switch
100BASE-TX (IEEE802.3u) 100 Mbps(*1) 100 m
1000BASE-T (IEEE802.3ab) 1 Gbps 100 m
Between Layer 2
switches
1000BASE-T (IEEE802.3ab) 1 Gbps 100 m
1000BASE-LX (IEEE802.3z) 1 Gbps 5 km (*2) (*3)
Between Layer 2 switch
and Layer 3 switch
1000BASE-T (IEEE802.3ab) 1 Gbps 100 m
1000BASE-LX (IEEE802.3z) 1 Gbps 5 km (*2) (*3)
*1: Applicable only for SCS, V net routers, or WAC router. There is no special configuration required for recommended layer 2
switches because the transmission speed is detected automatically.
*2: According to 1000BASE-LX interface specifications as defined by the IEEE802.3 standard.
*3: In case further length is required, refer to “Network Switch for Vnet/IP” (TI 30A10A30-01E.)
Depending on system configurations and device location, you may have to use optical fiber
connections due to limitations on transmission distance and electromagnetic interference.
n
UTP cables
The Vnet/IP network uses Enhanced Category 5 (CAT5e) UTP straight cables, which comply
with ANSI TIA/EIA-568-B.
UTP cables usually use RJ45 plugs as connectors. The maximum length of UTP cables is 100 m.
We recommend that you use cables with different coating colors for Vnet/IP bus 1 and bus 2 for
easier maintenance.
IMPORTANT
• Do not use cables with broken RJ45 connector latches. We recommend that you use
connector cables with boots to avoid breaking connectors during device maintenance.
• Be sure to confirm each connection for all devices (Vnet/IP stations, L2SW, and L3SW)
connecting to Vnet/IP is linked up with the correct link speed as shown in “Transmission
speed” of the table “Connection interface for Vnet/IP devices”.
Refer to section 4.3.3 “Confirm port status (show port all)” in TI “Network Switch for Vnet/IP”
(TI 30A10A30-01E) with to confirm the link speed.
Mar. 15, 2019-00