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DKM-046 User Manual                                                                                             V-2.0

 

 

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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 

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Front panel programming

 

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Supports Modbus programming

 

● DIN rail mounted, easy installation 
● Operating temp range: -20°C ... +70 °C 

● 

Two part connection system 

 

     

  

 

DESCRIPTION 

FEATURES 

Содержание DKM-046

Страница 1: ...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...

Страница 2: ...imity 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 electrica...

Страница 3: ...RING 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...

Страница 4: ...DKM 046 User Manual V 1 0 4 5 MODBUS COMMUNICATIONS 5 1 DESCRIPTION 5 2 COMMANDS 5 3 PROGRAM PARAMETERS 5 4 MEASUREMENTS AND CONTROLLER RECORDS 6 TECHNICAL SPECIFICATIONS...

Страница 5: ...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...

Страница 6: ...DKM 046 User Manual V 1 0 6 1 1 FRONT PANEL VIEW...

Страница 7: ...r 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 cabl...

Страница 8: ...DKM 046 User Manual V 1 0 8 1 3 INSTALLATION DIAGRAM...

Страница 9: ...o 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 the...

Страница 10: ...l 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...

Страница 11: ...ssed 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 Pa...

Страница 12: ...erature A10 Sensor 3 high temperature A11 Sensor 3 low relative humidity A12 Sensor 3 high relative humidity A13 T1 T2 or T2 T1 temperature difference alarm A14 T2 T3 or T3 T2 temperature difference a...

Страница 13: ...lated sensor As the default factory set the alarm is passive These parameters adjust the low relative humidity alarm limit for the related sensor Adjustment range is between 1 and 99 If the parameter...

Страница 14: ...These parameters enable disable sensors 2 and 3 The factory set value is 0 sensor disabled When a sensor is disabled the temperature and relative alarm limits related to this sensor cannot be adjusted...

Страница 15: ...e 10 Sensor 3 high temperature 11 Sensor 3 low relative humidity 12 Sensor 3 high relative humidity 13 Function active if any alarm exists 14 Through Modbus registers If any non zero value is written...

Страница 16: ...nction is active then the relay output is active 1 Functions are combined with logical AND operation Thus the relay output will be active only if all functions are active This parameter adjusts the de...

Страница 17: ...ameter determines the Modbus node address of the unit Every unit in the same Modbus loop must have a different node address Factory set value is 1 Adjustment range is 0 to 255 This parameter determine...

Страница 18: ...d 3 Factory set value is 0 Adjustment range is between 9 9 and 9 9 C These parameters determine respectively the offset value to be added to relative humidity sensors 1 2 and 3 Factory set value is 0...

Страница 19: ...determine respectively the cooling start upper limits for temperature sensors 1 2 and 3 When the temperaure measured from the related sensor goes over the programmed limit then the cooling relay func...

Страница 20: ...heating or cooling for temperature sensors 1 2 and 3 Adjustment range is between 0 C and 100 C Factory set value is 5 C These parameters determine respectively the de humidification start upper limits...

Страница 21: ...will become passive Adjustment range is between 0 and 100 Factory set value is 30 These parameters determine respectively the hysteresis values for stopping the humidification de humidification for h...

Страница 22: ...r value 57 return to factory settings Other values No operation Setting this parameter to 57 causes the unit to return to initial factory settings The parameter value is not recorded and always reads...

Страница 23: ...Reading The function 03 read multiple registers will be used for data reading The MODBUS master will send a query The answer will be one of the below A response containing the requested data An except...

Страница 24: ...e Data Writing The function 06 write single register or function 10h write multiple registers is used for data writing A maximum of 32 registers can be written at a time The MODBUS master will send a...

Страница 25: ...ion 4 CRC high byte CRC calculation Here is a procedure for generating a CRC 1 Load a 16 bit register with FFFF hex all 1 s Call this the CRC register 2 Exclusive OR the first 8 bit byte of the messag...

Страница 26: ...nd Modbus writes If any non zero value is written to register 77 then the unit will require password for Modbus reads and Modbus writes If any non zero value is written to register 76 then the unit wi...

Страница 27: ...17 Relay 1 function 2 Explained ch 4 7 16 BIT R W unsigned word 1 18 Relay 1 function 3 Explained ch 4 7 16 BIT R W unsigned word 1 19 Relay 1 function 4 Explained ch 4 7 16 BIT R W unsigned word 1 2...

Страница 28: ...4 13 16 BIT R W unsigned word 1 51 T3 T1 temp diff alarm limit Explained ch 4 13 16 BIT R W unsigned word 1 52 T1 T3 temp diff alarm limit Explained ch 4 13 16 BIT R W unsigned word 1 53 T1 cooling s...

Страница 29: ...alue is written to this register then the relay function for the related relay will be active 16 BIT R W unsigned word 1 73 Modbus relay 2 Explained ch 4 17 If the relay function is selected as 14 and...

Страница 30: ...factory set value is 256 The measured value is multiplied with this register and divided by 256 before displaying 16 BIT R W unsigned word 1 81 Sensor 2 humidity calibration The factory set value is...

Страница 31: ...erature difference 16 BIT R O signed word 0 01 20489 T2 T3 temperature difference 16 BIT R O signed word 0 01 20490 T3 T1 temperature difference 16 BIT R O signed word 0 01 Alarm status record is 16 b...

Страница 32: ...DKM 046 User Manual V 1 0 32...

Страница 33: ...is 16 bir long Each bit indicates the status of one relay If the bit value is 1 this means that the relay is active BIT NO DESCRIPTION 0 1 2 3 4 5 Relay 1 status bit 6 Relay 2 status bit 7 Relay 3 sta...

Страница 34: ...5 Data rate 2400 115200 baud Data type 8 bit no parity 1 bit stop Operating temp range 20 C to 70 C Max Relative humidity 95 non condensing Enclosure Flame retardent ROHS compliant high temperature AB...

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