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Chapter 2. Installation
2-8
TSU 120 User Manual 61202129L1-1
Set Chain Port Input
The TSU 120 can be configured from the chain port input when
T-WATCH Pro, SNMP, or the terminal interface are being used.
In this case, the chain port baud rate must also be selected.
Chain-In (PC)
The unit can be controlled from an external PC connected
directly or via modem to the chain-in port. When using chain-
in, the selection of the chain-in port baud rate from 9600 (fac-
tory default), 1200, 2400, 19200, or 38400 must be made using
the
U
NIT
C
ONFIGURATION
M
ENU
. See Unit Menu on page 5-12 for
details.
Unless locked out externally, the front panel can also control
the unit.
Chain-in/Chain Out
TSU 120 units and other TSUs can be linked together to form a
chain. Figure 2-4 provides an example of a chain-in arrange-
ment with a PC or a modem. The first TSU 120 in the chain
receives controlling input from the PC or modem.
Figure 2-4. Example of Chain-in
Subsequent TSUs in the chain are in a position to intake infor-
mation from another TSU. This in-taking of information from
another TSU in the chain is identified as chain-in. The baud
rate for the chained units must match that of the first unit.
Unless locked out externally, the front panel can also control
the unit.
TSU 120
PC or Modem
Chain
Input
Chain
Out
TSU 120/
TSU 100/TSU
Chain
In
Chain
Out
TSU 120/
TSU 100/TSU
Chain
In
Chain
Out