BETA Electronics RD31 User Manual

The RED LINE SERIES
Installation and operating
instructions
Temperature controller
ATEX reserves the right to make changes without further notice to any products herein to improve reliability, function or design. ATEX
does not assume any responsibility
for any improper use or application of any product or circuit described herein. ATEX
products are not designed, intended, or authorized to be use as components in
systems or applications intended to support or sustain life, or for any other application in which the failure of the ATEX
product could create a situation where personal
injury or death may occur.
5.00 OPERATING PARAMETERS
NAME MEANING SETTING (for PTC std)
SEt Main Set Point
Range between «LoS» &
«HiS»
HYS
Thermostat differential
(hysteresis)
Range 0 … 10 °C
LoS
Minimum value for SET POINT
parameter
Range –50 … +100 °C
HiS
Maximum value for SET POINT
parameter
Range –30 … +154 °C
Act
Thermostat control action:
cold/heat
0: cold;
1: heat.
LoA Low temperature alarm point Range –50 … +100 °C
HiA High temperature alarm point Range –30 … +155 °C
Alr Alarm mode of operation
0: disabled;
1: enables Hit;
2: enables Lot;
3: enables Hit & Lot.
OFS
Probe offset. Temp. correction
factor
Range –9.9 … +9.9 °C
dPt Defrost pause time Range 1 ... 254 (see “tis”)
ddt Defrost duration time Range 0 … 99 (see “tis”)
AcY Anticycling time Range 0 … 254 (see “tis”)
Adi Alarm delay on power-on Range 0 … 99 min
unt Measure unit
0: Celsius
1: Fahrenheit
dio Digital input 0 … 2 (optional)
tiS
Time scale of defrost and
anticycling
0: dPt [h], ddt [m], acy [s];
1: dPt [m], ddt [s], acy [s];
2: dPt [h], ddt [m], acy [m];
3: dPt [m], ddt [s], acy [m];
utd Update time delay Range 0 … 60 s
rES Resolution
0: decimal;
1: unit.
St2 Set point 2 (dio - energy saving)
Limits between «LoS» &
«HiS»
7.00
PARAMETER DESCRIPTION
SEt – Main Set Point: it’s the required temperature.
HYS - differential hysteresis:
the value that controls the
compressor/heater operation, moving t
he value of the set point in such a
way that the system does not oscillate.
LoS - low limit of set point:
a limit below which it is not possible to
move the set point value.
HiS - high limit of set point:
a limit above which it is not possible to
move the set point value.
Act - thermostat action:
describes the way by which the controller
manages the controlled variable. 0: direct/cold action, good for
refrigerating units, 1: inverse/heat action, usable for boiler units.
LoA - low operation point of alarm temperature: a
limit below which
the system goes in alarm and simultaneously the display shows «LoT».
HiA - high operation point of alarm temperature: a
limit above which
the system goes in alarm and simultaneously the display shows «Hit».
Alr - alarm mode of operation:
the high and low temperature alarms
can be enabled or disabled as required by the installer. The available
options are: 0 = all alarms disabled; 1 = only high temperature alarm
enabled; 2 = only low temperature alarm enabled; 3 = high and low
temperature alarms enabled.
OFS - offset of temperature: it
is the variation temperature added or
subtracted to the temperature measured by the probe to compensate for
any deviation from the real value.
dPt - defrost pause time: it is the time between th
e start of two
consecutive defrost actions (time cycle).
ddt - defrost duration time: it is
the duration of the defrost in each
cycle. Set ddt=0 to disable any defrost action.
AcY - anticycling delay time: it
is the minimum time between two
successive maneuvers of the main relay (off – on cycle).
It is also the
delay for the first activation of the relay at the start-up.
Adi - alarm delay initialization: delay between the power-
up of the
instrument and the arming of the alarms if enabled.
unt – Measure unit:
it switches the temperature unit between Celsius
and Fahrenheit.
dio - digital input mode operation: (optional) no active.
tiS - scale times:
it switches the scale times of the dPt from hours to
minutes, ddt from minutes to seconds, acy from seconds
to minutes and
vice versa.
utd – update time delay:
it sets the time delay between two display
refreshes.
rES - resolution:
it allows to display the measured value with decimal or
unitary resolution.
St2 – 2dary set point: No active – it is useful for the
energy saving
option, combined with the dio parameter.
6.00
ANOMALIES SIGNALING
MSG CAUSE OUTPUT
Lot Measured temperature is
lower than «LoA»
The relay status
does not change.
The internal buzzer
will switch on.
HIt Measured temperature is
higher than «HIA»
The relay status
does not change.
The internal buzzer
will switch on.
PrF The probe input line is
open or short circuited
The relay will switch
off
ATEX Industries srl
ATEX Industries srlATEX Industries srl
ATEX Industries srl
Z.I. Ponte Rosso - Via Forgaria, 7
33078 S. Vito al Tagliamento – PN - Italy
Tel.: +39 0434 85183 r.a.
Fax: +39 0434 85338
web: www.betaelectronics.it
e
-
mail
: beta@betaelectronics.it
RD31
Rev.: 07
-
07
-
2006
Cod.: 00990226
by ATEX

BETA Electronics RD31 Specifications

General

Brand	BETA Electronics
Model	RD31
Category	Temperature Controller
Language	English

Summary

Operating Parameters

Main Set Point (SEt)

The required temperature setting for the thermostat.

Thermostat Differential (HYS)

Controls compressor/heater operation to prevent oscillation.

Min Set Point Limit (LoS)

Lower limit for adjustable set point values.

Max Set Point Limit (HiS)

Upper limit for adjustable set point values.

Thermostat Control Action (Act)

Defines controller's action (cold/heat).

Low Temp Alarm Point (LoA)

Temperature limit for low alarm activation.

High Temp Alarm Point (HiA)

Temperature limit for high alarm activation.

Alarm Mode of Operation (Alr)

Enables/disables high and low temperature alarms.

Probe Offset (OFS)

Adjusts measured temperature to compensate probe deviation.

Defrost Pause Time (dPt)

Time between consecutive defrost actions.

Defrost Duration Time (ddt)

Duration of defrost in each cycle.

Anticycling Time (AcY)

Minimum time between main relay maneuvers.

Alarm Delay on Power-On (Adi)

Delay between instrument power-up and alarm arming.

Measure Unit (unt)

Switches temperature unit between Celsius and Fahrenheit.

Digital Input (dio)

Configuration for digital input mode.

Time Scale (tiS)

Scales defrost and anticycling times (hours/minutes/seconds).

Update Time Delay (utd)

Sets the time delay between two display refreshes.

Resolution (rES)

Displays measured value with decimal or unitary resolution.

Set Point 2 (St2)

Secondary set point for energy saving option.

Parameter Descriptions

Act - Thermostat Control Action

Describes controller's action: 0 for direct/cold, 1 for inverse/heat.

HYS - Differential Hysteresis

Controls compressor/heater operation to prevent oscillation.

LoS - Low Limit of Set Point

Limit below which set point value cannot be moved.

HiS - High Limit of Set Point

Limit above which set point value cannot be moved.

LoA - Low Operation Point of Alarm

Temperature limit for low alarm and 'LoT' display.

HiA - High Operation Point of Alarm

Temperature limit for high alarm and 'HiT' display.

Alr - Alarm Mode of Operation

Enables/disables temperature alarms (0=disabled, 1=Hi, 2=Lo, 3=Hi&Lo).

OFS - Offset of Temperature

Temperature variation added/subtracted to compensate probe deviation.

dPt - Defrost Pause Time

Time between start of two consecutive defrost actions.

ddt - Defrost Duration Time

Duration of defrost in each cycle. Set to 0 to disable.

AcY - Anticycling Delay Time

Min time between main relay maneuvers and first activation.

Adi - Alarm Delay Initialization

Delay between power-up and alarm arming if enabled.

unt - Measure Unit

Switches temperature unit between Celsius and Fahrenheit.

dio - Digital Input Mode Operation

Optional: configures digital input mode (e.g., no active).

tiS - Time Scale of Defrost

Switches defrost/anticycling times scale (hours/minutes/seconds).

utd - Update Time Delay

Sets the time delay between two display refreshes.

rES - Resolution

Allows display of measured value with decimal or unitary resolution.

St2 - Set Point 2

Secondary set point, useful for energy saving option.

Anomalies Signaling

Lot - Low Temperature Alarm

Indicates measured temperature is lower than LoA.

Hlt - High Temperature Alarm

Indicates measured temperature is higher than HiA.

PrF - Probe Input Failure

Indicates probe input line is open or short-circuited.

Specifications

Display

3 digit, 13.2 mm, high intensity red display.

Inputs

One PTC sensor, optional PTC 300 or digital input.

Measuring Range

Standard: -50 to +150 °C; with PTC300: -25 to +270 °C.

Accuracy

±0.5°C (±0.9°F) + 1 digit at 25°C.

Resolution

0.1°C (0.2°F) + 1 digit.

Outputs

Standard: 1 SPDT 8A relay; optional 16A/30A relays or alarm relay.

Power Supply

Standard 230 Vac; optional 115 Vac or 12 Vac/dc.

Environmental Conditions

Operating: -5 to +50°C; Storage: -20 to +70°C; Humidity: 30-90%.

Mechanical Data

Panel mounting dimensions, UL94V0 housing, screw terminals.

Installation

General Installation Precautions

Install only by specialized personnel, protect from extreme conditions.

Thermostat Probe Installation

Install away from airflow, protect from drops, keep wires short.

Electrical Wiring Recommendations

Separate power supplies, keep sensor/load cables apart for noise reduction.

Critical Environment Handling

Use line filters, RC snubbers, or independent power supply for noise reduction.

Mounting

Flush panel mount; ensure space for cables behind panel.

Front Panel Functions

Display Functions

Shows temperature, alarm indications, or status.

LED Indicators

LED 1 for compressor/heater, LED 3 for defrost cycle.

Set Point Modification

Press and hold SET key, adjust value with UP/DOWN keys.

Parameter Menu Access

Press and hold UP/DOWN keys to access and modify parameters.

Manual Defrost Cycle

Press and hold DEFROST key to manually start a defrost cycle.

Manual Off/On (OnOff Version)

Press and hold right key to switch controller off/on.

Keyboard Lock/Unlock

Press and hold SET and UP keys simultaneously to lock/unlock.