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User Manual Digital Heat Regulators
English
� During the installation and operation of the instrument, follow the
instructions set out below:
1) The instrument should be installed by a skilled operator.
2) Strictly follow the connection diagrams when installing the instrument.
3) Do not power or connect the instrument if any part of it is damaged.
4) Before touching the terminals, make sure the wires to be connected to
the instrument are not live.
5) The connection cables should be able to resist the maximum operating
temperature (Tmax), obtained from the sum of the maximum ambient
temperature (Ta) + a temperature of 20 °C (Tmax= Ta + 20 °C).
6) The instruments guarantee a main insulation between the low voltage
(250 V) and very low voltage parts.
7) Any outside switches connected to the controls should guarantee a
minimum insulation at operating temperature of 250 V AC, or should be
protected by equivalent insulation.
8) Contacts: all type 1C (CEI 107-70 and variants).
9) The instruments require no maintenance.
� Series of digital temperature regulators satisfying the simplest requirements in
the field of heat regulation. They can be used as heating or refrigeration regulators
and as maximum/minimum alarms.
� Three dedicated base models for probe input:
- PTC thermal resistances (Pos. Temp. Coeff.) - Ni100, Pt100 HT NiPt
- NTC thermal resistances (Negative Temperature Coefficient) HT NTC
- TC thermocouples - J, K, L, R, S, T, E, N HT JK
• F
or each single model, the probe input can be configured from the keyboard.
• T
wo probe inputs for the HT NTC models, for the measurement of two temperatures
that can be displayed alternatively by the closure or opening of an outer consensus
to be connected to the instrument, or directly from the keyboard for the 72x72 mm
rear panel version (this version has no digital input).
• Available in versions with 1 or 2 relay outputs with exchange contact.
• Heat regulators with 3 digit, seven segment and decimal point display.
• Relay intervention signalling lamp.
• T
emperature T2 signalling lamp (only models HT NTC-..P7.. and HT NTC-..D..)
• Display range: -99 ÷ +999 °C
• Display resolution: 0.1 °C (-9,9 ÷ +99.9 °C) and 1 °C (< -9.9 °C and > +99.9 °C)
• Precision: ±0.5 % of the end of scale value ±1 digit
(at an ambient temperature of 23 °C)
• Sampling time: 0.5s
TECHNICAL SPECIFICATIONS
SAFETY WARNINGS
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User Manual Digital Heat Regulators
English
• Digital parameter setting:
- Set point
- Differential
- Neutral zone
- Output drive times
- Digital input function and delay time
- Alarm delay / buzzer enable time
- Probe calibration offset
- Resolution displayed
- Temperature measurement unit
- Measurement display filter (update speed)
- Probe input type
- Password
- Operating modes (regulation):
— ON/OFF direct and/or reverse action with or without neutral zone
— PWM direct and reverse action and neutral zone
— ALARM
— Refrigeration mode
— Special mode
• 2
independent set points
• Digital input: 1 (not versions HT NiPt-..P7A, HT NTC-P7A, HT JK-..P7A) for outside
consensus for configurable function: outside alarm, regulation ON/OFF, selection
of probe to be displayed, set point switching, direct/reverse switching, etc
• Acoustic and visual alarm signals for: outside alarm (from digital input),
probe alarm (malfunction), minimum or maximum alarm
• Infrared receiver with RC-5 protocol (not versions HT NTC-1DA, HT NTC-2DA) for
remote control (accessory available separately for remote programming)
• Available in the following fixing versions: rear panel 33x75 mm,
rear panel 72x72 mm and modular 4 DIN
• P
ower supply: see table on the following page
• Rated power output: 3 VA for the rear panel 33x75 mm versions
4.5 VA for the rear panel 72x72 mm and modular 4 DIN versions
• Max absorption: 100 mA at 12 V 50 mA at 24 V (1 channel)
• Operating temperature: 0 ÷ +50 °C
• Operating humidity: <80%
• Storage temperature: -10 ÷ +70 °C (<80% RH)
• Protection level: front panel IP54 (IP40 for the 4 DIN module version)
terminals IP20
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