GE Mark VIe System Manual page 81

3.2.1 IONet Specifications
IONets are IEEE 802.3 100 Megabits full duplex Ethernet networks. All traffic on each IONet is deterministic UDP/IP based
packets. Each network (red, blue, black) is an independent IP subnet. The IEEE 1588 standard for precision clock
synchronization protocol is used to synchronize frame and time between the controllers, and the I/O modules on the IONet.
This synchronization provides a high level of traffic flow control on the networks.
The following figure display maximum IONet cable lengths.
Cat 5 e (copper)
100 m (328 ft)
Controller
Item
IEEE specification
Wire speed
Cable types
Maximum taps per segment
Maximum packets per network
Maximum number of switches
Topology
For the control system IONet topologies, the following rules apply for deploying SMF systems:
• No more than five switches can be placed in series between controller and remote I/O module.
• The topology should be kept as flat and balanced as possible (star topology).
• Use the GE ESWA or ESWB switch with additional IR
− GE part # 65G2100-009 for single-mode fiber distances up to 2 km
− GE part # 65G2100-008 for single-mode fiber distances up to 15 km
Caution
Ethernet Networks
Cat 5e (copper )
100 m (328 ft)
Copper or Fiber depending
on distance required
100 FX Fiber
Multi mode (MMF): 2000 m (6600 ft)
Single mode (SMF): 15 km (9.32 miles)
IONet Maximum Distances
Use of any other switch in this application may cause miss operation and/or damage to
the associated equipment.
Public Information
Cat 5 e (copper)
100 m (328 ft)
IONet Specification
802.3u
100 Mbps
100Base-TX: UTP Cat 5e
100Base-FX: MMF or SMF
2
199
5
Star
SFP single-mode transceiver for SFP1 and SFP2.
GEH-6721_Vol_I_BP System Guide 81
field wiring
Field device