Precision Digital PD540 - Manual (Page 6)

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CAUTION
Controller Mounting Precautions
„ Keep the input circuit wiring as far as possible away from power and ground circuits.
„ Keep the units in 10 to 50ºC (50 to 110ºF) with 20% to 90% relative humidity (RH).
The controller may need a warm up period to return to operating temperature ranges when below 10ºC.
„ To prevent electric shock, be sure to turn off the power source and circuit breaker before wiring.
„ The power requirements are 100 to 240 VAC, 50/60 Hz, 10 VA max. Do not switch power
supplies without first disconnecting the power supply.
„ Follow the operating procedures and precautions in the manual to avoid fire, shock, damage to the unit,
or injury. Follow the operations and mounting directions indicated in this manual.
„ Always create a ground connection where indicated, however do not ground to gas pipes,
water pipes, l ightening rods, or other potentially hazardous metal objects.
„ Do not apply power to the unit until all connections have been made.
„ Do not cover the venting holes in the rear of the unit.
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CAUTION
Operational Environment Precautions
(1) Only operate the controller when it is properly installed.
(2) When inst alling the controller, select a location where:
„ Rear terminals are protected from accidental contact.
„ Mechanical vibrations are minimal.
„ No corrosive gas is present.
„ Temperature fluctuation is minimal.
„ Temperature can be maintained between 10 and 50 ºC (50 and 110ºF) with 20 to 90% RH.
„ No direct heat radiation is present.
„ High levels of electromagnetic interference are not present
„ The unit is not exposed to water.
„ No flammable materials are present.
„ Dust particles are not present in the air.
„ Exposure to ultraviolet rays is minimal.
„ Openings on the rear of the controller are not blocked.
(3) This unit is suit able for installation in an enviornment classified as Pollution Degree 2.
(4) This unit is desig nated as Installation Category II.
(5) If the equipment is used in a manner not specified by the manufacturer, the protection provided by
the equipment may be impaired.
(6) A switch or circuit -breaker acting as the disconnect device shall be included in the application or the
installation.
PD540 Series Nova Digital Process and Temperature Controller Instruction Manual
6