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2 - 4 Power Wiring
2 - 4 Power Wiring
The controller is supplied to operate at 11-26 VAC / VDC or 90-250
The controller is supplied to operate at 11-26 VAC / VDC or 90-250
VAC. Check that the installation voltage corresponds with the power
VAC. Check that the installation voltage corresponds with the power
rating indicated on the product label before connecting power to
rating indicated on the product label before connecting power to
the controller. Near the controller a fuse and a switch rated at
the controller. Near the controller a fuse and a switch rated at
2A/250VAC should be equiped as shown in the following diagram.
2A/250VAC should be equiped as shown in the following diagram.
C21
C91
1
L
2
N
Figure 2.7 Power Supply Connections
Figure 2.7 Power Supply Connections
This equipment is designed for installation in an enclosure
This equipment is designed for installation in an enclosure
which provides adequate protection against electric shock. The
which provides adequate protection against electric shock. The
enclosure must be connected to earth ground.
enclosure must be connected to earth ground.
Local requirements regarding electrical installation should be rigidly
Local requirements regarding electrical installation should be rigidly
observed. Consideration should be given to prevent from
observed. Consideration should be given to prevent from
unauthorized person access to the power terminals.
unauthorized person access to the power terminals.
2-5 Sensor Installation Guidelines
2-5 Sensor Installation Guidelines
Proper sensor installation can eliminate many problems in a control
Proper sensor installation can eliminate many problems in a control
system. The probe should be placed so that it can detect any
system. The probe should be placed so that it can detect any
temperature change with minimal thermal lag. In a process that
temperature change with minimal thermal lag. In a process that
requires fairly constant heat output, the probe should be placed
requires fairly constant heat output, the probe should be placed
closed to the heater. In a process where the heat demand is variable,
closed to the heater. In a process where the heat demand is variable,
the probe should be closed to the work area. Some experiments with
the probe should be closed to the work area. Some experiments with
probe location are often required to find this optimum position.
probe location are often required to find this optimum position.
In a liquid process, addition of a stirrer will help to eliminate thermal
In a liquid process, addition of a stirrer will help to eliminate thermal
lag. Since the thermocouple is basically a point measuring device,
lag. Since the thermocouple is basically a point measuring device,
placing more than one thermocouple in parallel can provide an
placing more than one thermocouple in parallel can provide an
average temperature readout and produce better results in most
average temperature readout and produce better results in most
air heated processes.
air heated processes.
25
Fuse
6
2A/250VAC
7
90
250 VAC or
~
11
~
26 VAC / VDC
UM0C911B
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