Connecting The Chassis To The Tncs Server - Cisco Prisma II Installation And Operation Manual

Connecting the Chassis to the TNCS Server

Connecting a Prisma II Chassis to the TNCS Server Using the EM Connectors
Connecting the Prisma II Chassis to the TNCS server requires two special cable kits
that are available from the factory.
• The RS-485 cable kit, part number 735748, includes the following:
4 ea.
4 ea.
4 ea.
100 ea. 6-32 screws (1.25")
• The Prisma II cable kit, part number 738686, includes the following:
4 ea.
The RS-485 cable kit is used to communicate with the RS-485/422/TTL devices.
EM IN to TNCS Connection
To connect TNCS to a Prisma II Chassis, follow these steps.
1. Mount one of the breakout boxes (included in the RS-485 cable kit) in a rack
location central to the appropriate Prisma II Chassis.
2. Connect a RS-485 cable assembly (included in the RS-485 cable kit) from the
breakout box to the RS-485 COM port on the TNCS server.
3. Connect one Prisma II cable assembly (included in the Prisma II cable kit)
from the breakout box to the EM IN port of each Prisma II Chassis containing
an ICIM.
Note: As a general rule, it is recommended that the total number of ICIMs
connected to any single COM port on the TNCS server be limited to four (4).
However, you may connect more than four ICIMs per TNCS COM port as long as
the total number of devices (modules) monitored by a single COM port does not
exceed four-hundred (400) and the total number of devices monitored by any single
ICIM does not exceed 140.
78-739260-01 Rev F
Breakout boxes
RS-485 cable assemblies (50')
Breakout box mounting brackets
Prisma II cable assemblies
Installation 2-13