DKM-046 User Manual V-2.0
DESCRIPTION
FEATURES
DKM-046
TEMPERATURE &
HUMIDITY
CONTROLLER
DKM-046 is a DIN Rail mounted precision
unit capable of measuring temperature and
humidity in three different locations, provide
protection with 4 relay outputs and serve data
to remote monitoring and control systems.
Sensing modules are separated from the
base unit, connecting with cables. One
sensor comes together with the base unit.
Additional sensors may be purchased
separately.
Two different auxiliary supply versions are
available. The AC model accepts 85 to
305VAC and the DC model accepts 19 to
150VDC.
The module provides data to automation and
BMS systems through its isolated RS-485
Modbus port.
The programming is performed through
pushbuttons on the unit.
Sensor modules incorporate ST-HTS221
polymer dielectric planar capacitive sensors.
Relay functions are programmable with
functions selected from a list.
● Supports 3 temperature & humidity sensors
● AC and DC auxiliary supply versions
● Programmable relay outputs: 4
● Temperature and relative humidity control
● Independent cooling / heating / humidification
/ dehumidification functions for each sensor
● Temperature measuring range: -40...+80°C
● Humidity measuring range: 0% ... 100%
● Humidity accuracy: ±3.5% , 20 ... +80%
● Temperature accuracy: ± 1°C, 0 ... +60 °C
● Factory calibrated sensors
● Front panel programming
● Supports Modbus programming
● DIN rail mounted, easy installation
● Operating temp range: -20°C ... +70 °C
● Two part connection system
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DKM-046 User Manual V-1.0
Electrical equipment should be installed only by qualified
specialist. No responsibility is assured by the manufacturer or
any of its subsidiaries for any consequences resulting from the
non-compliance to these instructions.
Check the unit for cracks and damages due to transportation.
Do not install damaged equipment.
Do not open the unit. There are no serviceable parts inside.
Fuses must be connected to the power supply inputs, in close
proximity of the unit.
Fuses must be of fast type with a maximum rating of 6A.
Disconnect all power before working on equipment.
When the unit is connected to the network do not touch
terminals.
Any electrical parameter applied to the device must be in the
range specified in the user manual. Although the unit is
designed with a wide safety margin, over-range parameters may
reduce lifetime, alter operational precision or even damage the
unit.
Do not try to clean the device with solvent or the like. Only
clean with a dump cloth.
Verify correct terminal connections before applying power.
SAFETY NOTICE
Failure to follow below instructions will result in
death or serious injury
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DKM-046 User Manual V-1.0
TABLE OF CONTENTS
Section
1. INSTALLATION INSTRUCTIONS
1.1 FRONT PANEL VIEW
1.2 ELECTRICAL INSTALLATION
1.3 INSTALLATION DIAGRAM
2. PUSHBUTTON FUNCTIONS
3. SCREEN NAVIGATION
3.1 LAMP TEST
4. PROGRAMMING
4.1 ENTERING THE PROGRAMMING MODE
4.2 RESETTING ALARMS
4.3 SELECTING THE DEFAULT SCREEN
4.4 ADJUSTING TEMPERATURE LOW AND HIGH LIMITS
4.5 ADJUSTING RELATIVE HUMIDITY LOW AND HIGH LIMITS
4.6 ENABLING / DISABLING SENSORS
4.7 CONFIGURING RELAY OUTPUTS
4.8 ALARM DELAY
4.9 ALARM LOACK
4.10 MODBUS PARAMETERS
4.11 ADJUSTING TEMPERATURE OFFSET VALUES
4.12 ADJUSTING RELATIVE HUMIDITY OFFSET VALUES
4.13 ADJUSTING TEMPERATURE DIFFERENCE ALARM LIMITS
4.14 ADJUSTING COOLING START TEMPERATURE UPPER LIMITS
4.15 ADJUSTING HEATING START TEMPERATURE LOW LIMITS
4.16 ADJUSTING TEMPERATURE HYSTERESIS FOR COOLING AND
HEATING
4.17 ADJUSTING DE-HUMIDIFICATION START HUMIDITY
4.18 ADJUSTING HUMIDIFICATION START HUMIDITY
4.19 ADJUSTING HUMIDITY HYSTERESIS FOR HUMIDIFICATION
AND DE-HUMIDIFICATION
4.20 DISPLAYING THE FIRMWARE VERSION
4.21 RETURN TO FACTORY SETTINGS
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DKM-046 User Manual V-1.0
5. MODBUS COMMUNICATIONS
5.1. DESCRIPTION
5.2. COMMANDS
5.3. PROGRAM PARAMETERS
5.4. MEASUREMENTS AND CONTROLLER RECORDS
6. TECHNICAL SPECIFICATIONS
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DKM-046 User Manual V-1.0
1. INSTALLATION INSTRUCTIONS
Before installation:
Read the user manual carefully, determine the correct connection diagram.
Install the unit to the DIN rail.
Make electrical connections with plugs removed from sockets, then place plugs to their sockets.
Be sure that adequate cooling is provided.
Be sure that the temperature of the environment will not exceed the maximum operating temperature in any
case.
Be sure that the unit is not subject to water spill.
Below conditions may damage the device:
Incorrect connections.
Incorrect power supply voltage.
Connecting or removing data terminals when the unit is powered-up.
Connecting or removing sensors when the unit is powered-up.
High voltage applied to communication ports.
Overload or short-circuit at relay outputs.
Excessive vibration, direct installation on vibrating parts.
Below conditions may cause abnormal operation:
Power supply voltage below minimum acceptable level.
Power supply frequency outside acceptable limits.
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DKM-046 User Manual V-1.0
1.1 FRONT PANEL VIEW
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DKM-046 User Manual V-1.0
Do not install the unit close to high electromagnetic
noise emitting devices like contactors, high current
busbars, switchmode power supplies and the like.
1.2 ELECTRICAL INSTALLATION
Although the unit is protected against electromagnetic disturbance, excessive disturbance
can affect the operation, measurement precision and data communication quality.
ALWAYS remove plug connectors when inserting wires with a screwdriver.
Fuses must be connected to the power supply inputs, in close proximity of the unit.
Fuses must be of fast type with a maximum rating of 6A.
Use cables of appropriate temperature range.
Use adequate cable section, at least 0.75mm2 (AWG18).
Follow national rules for electrical installation.
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DKM-046 User Manual V-1.0
1.3 INSTALLATION DIAGRAM
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DKM-046 User Manual V-1.0
BUTTON
FUNCTION
PROGRAMMING: Select related parameter / save adjusted
parameter.
Switch to the upper screen.
PROGRAMMING: increase value
Switch to the lower screen.
PROGRAMMING: decrease value
HELD PRESSED TOGETHER FOR 2 SECONDS:
Selects programming mode. If held pressed in programming
mode, then returns to normal mode.
NO KEY PRESSED DURING 1 MINUTE:
Returns to the main display screen.
2. PUSHBUTTON FUNCTIONS
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DKM-046 User Manual V-1.0
HELD PRESSED FOR 2 SECONDS:
Enters lamp test mode. When released returns to
normal operating mode.
3.1 LAMP TEST
3. SCREEN NAVIGATION
Buttons allow navigation between measurement values. (Temp_1, Humidity_1,
Temp_2, Humidity_2, Temp_3, Humidity_3, Alarms)
Leds related to the currently displayed values will turn on, other leds will turn off.
Temperature display: Temperature is displayed with 0.1 °C accuracy. The related Modbus
register has 0.01 °C accuracy.
Humidity display: The relative humidity is displayed with 1% accuracy. The related
Modbus register has 0.01% accuracy.
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DKM-046 User Manual V-1.0
In order to enable the programming menu,
hold both MENU buttons pressed for 2 seconds.
In order to exit programming menu,
hold both MENU buttons pressed for 2 seconds.
If no button is pressed during 1 minute, then the unit will
automatically close the programming mode.
Parameters may be scrolled with these buttons.
When SET button is pressed:
The parameter value is displayed
The value on the screen is recorded and the next
parameter is displayed.
Parameter values are modified with UP and DOWN Menu
buttons. If the button is held pressed, the the value will change
with larger steps.
After adjusting the parameter value this button saves the value
on the screen and switched to the next parameter.
4. PROGRAMMING
4.1 ENTERING THE PROGRAMMING MODE
In order to offer the maximum flexibility to the customer, the module has several
programmable parameters.
Device configurations
Default screen configuration
Measurement configurations
Alarm reset
Alarm high/low limit adjustments
Input/Output Configurations
Relay configuration
Alarm delays
Modbus configuration
Unit Calibration
Modbus configuration
Return to factory settings
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