Read Before Using - Fuji Electric Model: PXR4 Instruction Manual

Read before using

Before using this product, the user is requested to read the following precautions carefully to ensure
the safety. Safety precautions must be taken by every user to prevent accidents.
The safety requirements are classified into "warning" and "caution" according to the following
interpretations :
WARNING Over-temperature Protection
Any control system should be designed with prior consideration that any part of the system has potential to
fail.
In case of temperature controlling, a continuance of heating on should be regarded as the most dangerous
state.
The followings are the most probable causes of inducing continuance of heating on:
1) The failure of the controller with heating output constantly on
2) The disengagement of the temperature sensor out from the system
3) The short circuit in the thermocouple wiring
4) Valve or switch contact point outside the system is locked to keep heating on
In any application in which it is apprehended that physical injury or destruction of equipment might occur,
please install an independent safeguard equipment to prevent over-temperature which shut down the heating
circuit, and for additional safety, we recommend this equipment to have its own temperature sensor.
The alarm output signal of the controller is not designed to work as protective measures when the controller
is in failure condition.
1. Warning
1.1 Installation and wiring
• This controller designed to be installed at the following conditions.
Operating temperature
Operating humidity
Installation category
Pollution degree
• The controller must be installed such that with the exception of the connection to the mains, creepage
and clearance distances shown in the table below are maintained between the temperature probe
and any other assemblies which use or generate a voltage shown in the table below.
Failure to maintain these minimum distances would invalidate the EN 61010 safety approval.
Voltage used or generated
by any assemblies
Up to 50Vrms or Vdc
Up to 100Vrms or Vdc
Up to 150Vrms or Vdc
Up to 300Vrms or Vdc
Above 300Vrms or Vdc
Safety Precautions
Suggesting that the user's mishandling can
Warning
result in personal death or serious injury.
Suggesting that the user's mishandling can result
Caution
in personal injury or damage to the property.
-10 to + 50 [°C ]
90%RH or less (Non condensation)
II
Conforming to IEC1010-1
2
Clearance
(mm)
0.2
0.2
0.5
1.5
Contact with our sales office.
– 3 –
Creepage
(mm)
1.2
1.4
1.6
3.0