TD060100-0MA
13
Design Considerations
NCM Compatibility
The
JC-MER-CXB
is compatible with all versions of the
NCM200
,
NCM300
and NCM4500
. If NCM101s/401s are used, they
must be
Revision K
or later. EPROM
chips in
older NCM101s/401s
can be
upgraded
for
compatibility with the
JC-MER-CXB
. For information
about upgrading,
contact Field
Support
Services. (
The NCM102 does
Quantity of Routers Needed
The quantity of
JC-MER-CXB
s you need is identical to the
number of
ARCNET segments connected through the Ethernet
system.
For
example, two
unit
s are required to
connect two ARCNET segments
over one Ethernet segment (see
Figure
6
). A router is placed at each
location where the Ethernet
segment meets the ARCNET segment.
Up to 50
JC-MER-CXB unit
s can be used on each Metasys
Network
(i.e., all ARCNET
segments).
Physical Considerations
The router can be installed in a variety of ways, depending on the job
site. When selecting a location, consider the following:
1.
The location must have access to the customer’s Ethernet
network, the ARCNET segment
being
service
d
,
and power.
2.
A
JC-MER-CXB
can be panel-mounted
or DIN-rail mounted
.
Design Summary
Use these steps as a guideline when designing a
JC-MER-CXB
Network, referring to Figure
6
for an example:
1.
Lay out the network as you would a normal Metasys N1
Network. Determine the number and location of NCMs and
Operator Workstations that will service the facility.
2.
Determine which portions of the network will use ARCNET and
which will use Ethernet. The network layout must consist of
multiple ARCNET segments connected by the customer’s
Ethernet network.
The Ethernet network must be a single Local Area Network
(LAN) that can interconnect all of the ARCNET segments.
3
.
Need power: either 10–36 VDC or 8–24 VAC
.
not contain an N1 connection.)