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TAC AB, 2003-07-01 0-004-7771-2 (GB), 9 (36)
TAC Xenta 400 I/O modules 2 I/O modules in the TAC Xenta 400 series
2 I/O modules in the TAC Xenta 400 series
2.1 Hardware units
The TAC Xenta freely-programmable controllers consist of the follow-
ing units.
• The TAC Xenta 301/302/401 controller. The controller is the
brain of the system. It contains the database of the inputs and
outputs of the plant. It also contains the system and application
software for all the functions that are to be performed by the
controller and connected peripheral units.
• I/O expansion modules, which provide the inputs and outputs of
the TAC Xenta controller.
• The TAC Xenta OP is an easy-to-use operator panel, with a dis-
play. The values are presented in plain language in a menu system.
The OP can be connected to any controller in the network.
TAC Xenta
controller
Operator panel
TAC Xenta 400
input/output module
12 13 14 15 16 17 18 20
TAC Xenta units; the Operator panel, the TAC Xenta controller (here: 401) and an I/O expansion module
12 13 14 15 16 17 18 20
A number of controllers and I/O modules can form a local network
and exchange data.
The TAC Xenta OP operator panel is used to give the user access to
certain parameters and make it possible to present alarms without
communicating with a central system. The most important functions
of the operator panel are status monitoring, adjustment of setpoints
and time channels and the display of alarms.
A maximum of two OPs may be connected to each controller.