Non-Redundant Or Redundant Star To 900 I/O - Honeywell ControlEdge 900 platform Hardware Planning And Installation Manual

Component
Type
EPMs
36
Comments
be set to indicate I/O network connectivity. This is done by setting it to
position 3. The IP address of the EPM is assigned by the UOC CPM
based on the module number set on the 10X and 1X rotary switches.
Ensure that the values within the range of 1-12 are used, as these are
the valid values. This too must be set before the EPM is inserted into
its slot.

Non-Redundant or Redundant Star to 900 I/O

When connecting to ControlEdge 900 I/O only, either a non-
redundant or redundant star topology may be used. The network
redundancy type is PRP (Parallel Redundancy Protocol). In this
topology no third party redundancy boxes are required. The UOC CPM
connects directly, using its two downlink Ethernet ports. Similarly,
EPM modules connect directly using their two Ethernet ports. When a
UOC downlink is constructed in this fashion, it is not possible to
connect third party I/O, Devices or PLCs. Only 900 I/O racks may be
connected.
An example of a UOC and two 900 I/O racks on a downlink,
redundant, star network is shown in the following diagram. Also
shown are the CPM's connection of ETH1 to the A, Yellow FTE
network tree and ETH2 to the B, Green FTE network tree.