Precautions for Safe Use
8
E5@D Digital Temperature Controllers Communications Manual (H225)
When a noise filter is used at the power supply, first check the voltage or current, and attach the
noise filter as close as possible to the Digital Controller.
Allow as much space as possible between the Digital Controller and devices that generate power-
ful high frequencies (high-frequency welders, high-frequency sewing machines, etc.) or surge.
( 8 ) Use the Digital Temperature Controller within the rated load and power supply.
( 9 ) Make sure that the rated voltage is attained within 2 seconds of turning ON the power using a
switch or relay contact. If the voltage is applied gradually, the power may not be reset or output
malfunctions may occur.
(10) Make sure that the Digital Controller has 30 minutes or more to warm up after turning ON the
power before starting actual control operations to ensure the correct temperature display.
(11) When using adaptive control, turn ON power for the load at the same time as or before supplying
power to the Digital Controller. If power is turned ON for the Digital Controller before turning ON
power for the load, tuning will not be performed properly and optimum control will not be achieved.
(12) During tuning, ensure that the power for the load (e.g., heater) is ON. Otherwise, the correct tun-
ing result cannot be calculated and optimal control will not be possible. Tuning is used in the fol-
lowing functions: AT, adaptive control, automatic filter adjustment, and water-cooling output
adjustment.
(13) A switch or circuit breaker must be provided close to the Digital Controller. The switch or circuit
breaker must be within easy reach of the operator, and must be marked as a disconnecting means
for the Digital Controller.
(14) Wipe off any dirt from the Digital Controller with a soft dry cloth. Never use thinners, benzine, alco-
hol, or any cleaners that contain these or other organic solvents. Deformation or discoloration may
occur.
(15) Design the system (e.g., control panel) considering the 2 seconds of delay in setting the Digital
Controller’s output after the power supply is turned ON.
(16) The output will turn OFF when you move to the initial setting level. Take this into consideration
when performing control.
(17) The number of non-volatile memory write operations is limited. Therefore, use RAM write mode
when frequently overwriting data, e.g., through communications.
(18) Use suitable tools when taking the Digital Controller apart for disposal. Sharp parts inside the Dig-
ital Controller may cause injury.
(19) Always touch a grounded piece of metal before touching the Digital Temperature Controller to dis-
charge static electricity from your body.
(20) Install the DIN Track vertically to the ground.
(21) Observe the following precautions when drawing out the body of the Digital Controller.
•Always follow the procedure given in 2-1 Drawing Out the Interior Body of the Digital
Controller to Replace It in the E5
D Digital Temperature Controller User’s Manual (Cat. No.
H224).
•Turn OFF the power supply before you start and never touch the terminals or electronic
components with your hands or subject them to shock. When you insert the interior body, do
not allow the electronic components to touch the case.
•When you insert the interior body into the case, confirm that the hooks on the top and bottom
are securely engaged with the case.
•If the terminals are corroded, replace the rear case as well
(22) For the power supply voltage input, use a commercial power supply with an AC input. Do not use
the output from an inverter as the power supply. Depending on the output characteristics of the
inverter, temperature increases in the product may cause smoke or fire damage even if the prod-
uct has a specified output frequency of 50/60 Hz.
(23) Do not exceed the communications distance that is given in the specifications and use the speci-
fied communications cable.
