Eaton TC 48, Руководство пользователя, Страница: 24 / 56

2 - 4 Power Wiring 2 - 4 Power Wiring
The controller is supplied to operate at 11-26 VAC / VDC or 90-250
VAC. Check that the installation voltage corresponds with the power
rating indicated on the product label before connecting power to
the controller. Near the controller a fuse and a switch rated at
2A/250VAC should be equiped as shown in the following diagram. The controller is supplied to operate at 11-26 VAC / VDC or 90-250
VAC. Check that the installation voltage corresponds with the power
rating indicated on the product label before connecting power to
the controller. Near the controller a fuse and a switch rated at
2A/250VAC should be equiped as shown in the following diagram.
90 250 VAC or
11 26 VAC / VDC
~
~
Figure 2.6 Power Supply Connections Figure 2.6 Power Supply Connections
This equipment is designed for installation in an enclosure
which provides adequate protection against electric shock. The
enclosure must be connected to earth ground.
Local requirements regarding electrical installation should be rigidly
observed. Consideration should be given to prevent from
unauthorized person access to the power terminals.
This equipment is designed for installation in an enclosure
which provides adequate protection against electric shock. The
enclosure must be connected to earth ground.
Local requirements regarding electrical installation should be rigidly
observed. Consideration should be given to prevent from
unauthorized person access to the power terminals.
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2
L
N
7
8
L
N
2-5 Sensor Installation Guidelines 2-5 Sensor Installation Guidelines
Proper sensor installation can eliminate many problems in a
control system. The probe should be placed so that it can detect
any temperature change with minimal thermal lag. In a process
that requires fairly constant heat output, the probe should be
placed closed to the heater. In a process where the heat demand
is variable, the probe should be closed to the work area. Some
experiments withprobe location are often required to find this
optimum position.
In a liquid process, addition of a stirrer will help to eliminate
thermal lag. Since the thermocouple is basically a point
measuring device,placing more than one thermocouple in parallel
can provide an average temperature readout and produce better
results in most air heated processes.
Proper sensor installation can eliminate many problems in a
control system. The probe should be placed so that it can detect
any temperature change with minimal thermal lag. In a process
that requires fairly constant heat output, the probe should be
placed closed to the heater. In a process where the heat demand
is variable, the probe should be closed to the work area. Some
experiments withprobe location are often required to find this
optimum position.
In a liquid process, addition of a stirrer will help to eliminate
thermal lag. Since the thermocouple is basically a point
measuring device,placing more than one thermocouple in parallel
can provide an average temperature readout and produce better
results in most air heated processes.
TC 96 TC 96
TC 48 TC 48
Fuse
2A/250VAC
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