Datasheet
20 Digital Temperature Controllers E5CN/E5CN-U
Precautions
Note: Refer to the ntlp: Electronic Temperature Controller Catalog (Cat. No. ntlp) for common precautions.
Note: 1. An SELV circuit is one separated from the power supply with
double insulation or reinforced insulation, that does not
exceed 30 V r.m.s. and 42.4 V peak or 60 VDC.
2. A class 2 power supply is one tested and certified by UL as
have the current and voltage of the secondary output re-
stricted to specific levels.
Precautions for Safe Use
1. Do not use the Temperature Controller in the following locations.
• Locations exposed to radiated heat from heating devices
• Locations subject to exposure to water or oil
• Locations subject to direct sunlight
• Locations subject to dust or corrosive gas (especially sulfide gas
or ammonia gas).
• Locations subject to severe temperature changes
• Locations subject to icing or condensation
• Locations subject vibration or strong shock
2. Use and store the Temperature Controller within the rated
ambient temperature and humidity. When two or more
Temperature Controllers are mounted horizontally close to each
other or vertically next to one another, the internal temperature
will increase due to heat radiated by the Temperature Controllers
and the service life will decrease. In such a case, use forced
cooling by fans or other means of air ventilation to cool down the
Temperature Controllers.
3. Allow enough space around the Temperature Controller to
ensure proper heat dissipation. Do not block the ventilating
holes.
4. Be sure to wire terminals properly using the correct polarity.
5. Use crimp terminals with the specified dimensions (M3.5, width
7.2 mm max.).
Use wires of a thickness of AWG24 (0.205 mm
2
) to AWG14
(2.081 mm
2
). The exposed current-carrying part to be inserted
into terminals must be 5 to 6 mm.
6. Do not connect anything to unused terminals.
7. Allow as much space as possible between the Controller and
devices that generate powerful high frequencies (high-frequency
welders, high-frequency sewing machines, etc.) or surge.
Keep the wiring for the Temperature Controller's terminal block
away from power cables carry high voltages or large currents.
Also, do not wire power lines together with or parallel to
Temperature Controller wiring.
8. Use the Temperature Controller within a power supply voltage
and load that meet all specifications and ratings.
9. Set up the power supply so that the voltage will reach the rated
voltage within 2 seconds after turning ON.
10. Allow at least 30 minutes for the Temperature Controller to warm
up.
11. When using self-tuning, turn ON power for the load (e.g., heater)
at the same time as or before supplying power to the
Temperature Controller.
12. Install the appropriate switches and circuit breakers and label
them accordingly so that power can be turned OFF in an
emergency by the person operating the Temperature Controller.
13. If you remove the Controller from its case, do not touch or apply
shock to the electronic parts inside. When placing the Controller
back in the case, make sure that electronic parts do not come in
contact with the case.
14. Use alcohol to clean the Temperature Controller. Do not use
thinner or other solvent-based substances.
15. It will require 2 seconds for the outputs from the Temperature
Controller to stabilize after turning ON the power supply. Design
the system (e.g., the control panel) to allow for this time.
16. Outputs will turn OFF depending on the mode when switching to
the initial setting mode. Confirm system safety before switching
the mode.
Do not touch any of the terminals while the power is being
supplied. Doing so may occasionally result in minor
electric shock.
Do not allow pieces of metal or wire cuttings to get inside
the Temperature Controller. Failure to do so may
occasionally result in minor electric shock, fire, or
damage to equipment.
Do not use the Temperature Controller in locations
subject to flammable or explosive gas. Doing so may
occasionally result in minor injury due to explosion.
Do not attempt to disassemble, modify, or repair the
Temperature Controller or touch any internal
components. Doing so may occasionally result in minor
electric shock, fire, or damage to equipment.
Caution: Danger of Electric Shock
a) This Temperature Controller is UL-listed as an open-
type process controller. Use it in a control panel
structure so that fire will not leave the panel.
b) When using two or more cutoff switches, turn OFF all
switches so that no power is supplied to the
Temperature Controller before maintenance or
inspections.
c) Signal inputs are SELV restricted circuits. (See note 1.)
d) Caution: To reduce the danger of fire or electric shock,
do not internally connect the outputs of different class
2 circuits. (See note 2.)
If the output relay is used beyond its life expectancy, its
contacts may occasionally become fused or burned.
Always consider the actual application conditions and be
sure to use the output relay within its rated load and
electrical life expectancy. The life expectancy of the
output relay varies considerably according to its switching
capacity and operating conditions.
Fire may occasionally occur if terminal screws become
loose. Tighten the terminal screws using a torque
between 0.74 and 0.90 N·m.
Make settings for the Temperature Controller that are
suitable for the controlled system. Failure to do so may
result in unexpected operation occasionally resulting in
damage to equipment or personal injury.
Warning: To reduce the danger or electric shock or fire,
use the Temperature Controller in an controlled
environment relatively free from polluting materials.
Take appropriate safety measures, such as installing a
separate monitoring system, to ensure safe operation in
the event of a malfunction of the Temperature Controller.
Loss of operation control or alarm outputs due to
malfunction may occasionally result in physical damage
to the controlled system or equipment.
!CAUTION