2 4 Power Wiring2 4 Power Wiring
The controller is supplied to operate at 11-28 VAC / VDC or 90-264VAC.Check
that the installation voltage corresponds with the power rating indicated on the
product label before connecting power to the controller.
The controller is supplied to operate at 11-28 VAC / VDC or 90-264VAC.Check
that the installation voltage corresponds with the power rating indicated on the
product label before connecting power to the controller.
Figure 2.4
Power Supply Connections
Figure 2.4
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.
2 5 Sensor Installation Guidelines2 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 with probe 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 type is also a very important factor to obtain precise
measurements. The sensor must have the correct temperature range to meet
the process requirements. In special processes the sensor might need to have
different requirements such as leak-proof, anti-vibration, antiseptic, etc.
Standard sensor limits of error are 4degrees F ( 2degrees C ) or 0.75% of
sensed temperature (half that for special ) plus drift caused by improper
protection or an over-temperature occurrence. This error is far greater than
controller error and cannot be corrected on the sensor except by proper
selection and replacement.
AA
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 with probe 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 type is also a very important factor to obtain precise
measurements. The sensor must have the correct temperature range to meet
the process requirements. In special processes the sensor might need to have
different requirements such as leak-proof, anti-vibration, antiseptic, etc.
Standard sensor limits of error are 4degrees F ( 2degrees C ) or 0.75% of
sensed temperature (half that for special ) plus drift caused by improper
protection or an over-temperature occurrence. This error is far greater than
controller error and cannot be corrected on the sensor except by proper
selection and replacement.
AA
UMA83001A-August-2024
17
90 264 VAC or
11 26 VAC / VDC
~
~
Fuse
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