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Business > Industrial Devices > Automation Controls Top > FA Sensors & Components > Energy Management Solutions > Communication Devices > KR20 Wireless Unit > Specifications

KR20 Wireless Unit

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Discontinued

	December 19, 2014

Specifications

Specifications

General specifications

Item	Specifications
Item	RS485 type	I/O type
Rated voltage	12 to 24V DC
Operating voltage range	10.8 to 26.4V DC
Current consumption	150mA or less (During sending)	200mA or less (During sending)
Inrush current	23A (when 24V DC)
Ambient temperature	-10 to +50°C
Storage temperature	-20 to +70°C
Ambient humidity	30 to 85%RH (at 25°C non-condensing)
Storage humidity	30 to 85%RH (at 25°C non-condensing)
Breakdown voltage (initial)	500V AC for 1 min. (Between power terminal and FG/DSUB connector)	500V AC for 1 min. (Between power terminal and FG/DSUB connector, Between power terminal and input/output terminal, Between input terminal and output terminal)
Insulation resistance (initial)	100M ohm or more (at 500V DC mega) (Between power terminal and FG/DSUB connector)	100M ohm or more (at 500V DC) (Between power terminal and FG/DSUB connector, Between power terminal and input/output terminal, Between input terminal and output terminal)
Vibration resistance	10 to 55Hz 1cycle/min. Double amplitude of 0.75mm, 10min. on 3 axes
Shock resistance	98m/s² or more, 4 times on 3 axes
Noise immunity	1000V [p-p] with pulse width 50ns, 1 μs (based on in-house measurements) (Power terminal)
Overcurrent protection of power supply	Fuse (Rated current: 3.15A)
Weight	Approx. 160g

Wireless specifications

Item	Specifications
Item	RS485 type	I/O type
Wave type	Direct sequence spread spectrum (DS-SS)
Transmission distance	Approx. 250 m outdoors* (straight, obstacle-free distance), Approx. 50 m indoors
Wave output	6mW/MHz or less
Frequency	2403.328MHz to 2480.128MHz
Number of channels	76ch (Select with communication channel switch)*1
Number of channels in same transmission area	15 channels recommended (when select fixed channel)*2
Transmission speed	134kbps
Communication style	1: N topology (N: 99 units max.)
Repeater function	8 repeaters (Between master and slave)
Response time	-	OFF→ON	Max. 80ms*3
Response time	-	ON→OFF	Max. 80ms*3

* The main unit, standard antenna and antenna with cable are designed for indoor use.
If they are used outdoors, then take water-proof measures such as using plastic cases, etc.

Serial communication specifications (RS232C) *4

Item	Specifications
Interface	Conforming to RS232C
Transmission distance	15m
Transmission speed	1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bit/s (Selectable with MODE switch)
Communication method	Half-duplex
Synchronous system	Synchronous communication method
Transmission format	Stop bit: 1 bit, Parity: Not available/Available (odd/even), Data length: 7bit/8bit
Data buffer	2048 bytes (Max. data byte size for send and receive one time)

Serial communication specifications (RS485) (only AKR2002) *4

Item	Specifications
Interface	Conforming to RS485
Transmission distance	1,200m
Transmission speed	1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bit/s (Selectable with MODE switch)
Communication method	Half-duplex
Synchronous system	Synchronous communication method
Transmission format	Stop bit: 1 bit, Parity: Not available/Available (odd/even), Data length: 7bit/8bit
Data buffer	2048 bytes (Max. data byte size for send and receive one time)
Ending resistance	Approx. 120 ohm (built-in) (Terminal “E” and terminal “–” are shorted when ending.)
Number of connected units	Max. 31

Input specifications (only AKR2015 and AKR2045)

Item	Specifications
Item	AKR2015 (Output NPN type)	AKR2045 (Output PNP type)
Insulation method	Optical coupler
Rated input voltage	12 to 24 V DC (voltage input)
Operating voltage range	10.8 to 26.4 V DC
Rated input current	Approx. 3mA/when 12 V, Approx. 6mA/when 24 V
Points per common*5	8 points/common (Either positive or negative of input power supply can be connected.)	6 points/common (Either positive or negative of input power supply can be connected.)
Input impedance	Approx. 4k ohm
Operation indicator	LED display (green)

Output specifications (only AKR2015 and AKR2045)

Item		Specifications
Item		AKR2015 (Output NPN type)	AKR2045 (Output PNP type)
Insulation method		Optical coupler
Output type		Open collector (NPN)	Open collector (PNP)
Rated load voltage		12 to 24 V DC
Allowable load voltage range		10.8 to 26.4 V DC
Max. load current		0.3A
Max. inrush current		1.5A
Points per common*5		9 points/common (Signal output, Communication error output)	7 point/common (Signal output, Communication error output)
Off state leakage current		1 μA or less
On state voltage drop		1.5 V DC or less
External power supply (+, – terminal)	Voltage	-	10.8 to 26.4V DC
External power supply (+, – terminal)	Current	-	Max. 60mA
Surge absorber		Zener diode
Operation indicator		LED display

Functions specifications

Item	Specifications
Item	RS485 type	I/O type
Setting function	• Operating mode change (SET, RUN, TEST) • Communication channel change (CH switch) • Unit No. change (UNIT No. switch) • Serial communication setup (MODE switch) • Slave registration • Initializing (Factory setting)
Setting function	-	Data holding (When communication error)
Test function	Communication test: 3-stage LED display (With setting tool, it can do various communication tests such as changing data amount, including repeaters and so on. And it can measure an approximate communication time.) Field intensity monitor: 3-stage LED display (With setting tool, it can display and record a field intensity of each channel by numeric value.)
LED display	• Distinguish master or slave (MASTER) • On communication, Power on (COM.) • On setting, Complete setting (SET) • Error, Alarm, Caution (ALARM) • Level indication (1, 2, 3: when using test function)
LED display	-	I/O operating display (16 or 12 points + 1 point of communication error)

*1 Adding to the fixed channel, 76ch (00 to 4B), 89 group channel can be selected.
Group channel is the function that it selects connectable channel from several fixed channels automatically. When using repeater function, use with the fixed channel.
When using group channel, settable channel numbers are decreased in the same communication area and the communication time becomes longer.
*2 It is different according to the mounting conditions, when several channels are used in the same communication area, communication error might occur due to interference radio wave.
*3 There are no error without serial communication at 1:1 topology.
Response time: Time from input signal to input terminal to output from output terminal in connected equipment
When input signal is shorter than response time, there is a possibility not to transfer to output side.
*4 RS232C and RS485 are not used in the same time.
*5 In case simultaneously ON of input and output, input number and output number are restricted according to the ambient temperature.

Specifications

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