Shenzhen KYL Communication Equipment Co., Ltd

KYL-200L Low Power Wireless
    Transceiver Data Module

Shenzhen KYL Communication Equipment Co., Ltd

Address: Unit 5-7, Building3, Huangdu Square, South of Exhibition Center, Yitian
Road, Futian District, Shenzhen Guangdong China

Tel: +86-0755-83410815
Fax: +86-0755-83408785
Yahoo messenger:

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I. About KYL-200L ....................................................................3
II. Features of KYL-200L ..........................................................3
III. Applications of KYL-200L.................................................. 4
IV. How to use KYL-200L..........................................................4
V. Networking Application of KYL-200L............................... 14
VI. Technical specification of KYL-200L................................ 14
VII. Description of type.............................................................. 15

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Before using the product please read the use manual carefully.
Any question in technical, you can contact us.
Tel: +86-755-83410815.

I: About KYL-200L

KYL-200L, the low power wireless transceiver data module is used as the wireless
data transceiver in long-ranges, with the small size, weight and power consumption
and good stability and reliability. Narrowband low power UHF wireless data
transmitters and receivers with channel spacing as low as 25 KHz.

II: Features:

I. Features of KYL-200L

1. Low power transmission with 500mW, 600mW~1W is available if needed.

2. With 433MHz as factory default carrier frequency, but 400-470MHz, 868MHz,

915MHz is available if needed.

3. High anti- interference and Low BER (Bit error Rate)

Based on the Gaussian Frequency Shift Keying (GFSK) modulation, the

high-efficiency forward error correction channel encoding technology is used to

enhance data's resistance to both transient interference and random interference and

the actual bit error rate of 10-5 ~ 10-6 can be achieved when channel bit error rate is


4. Long Transmission Distance

Within the visible range, when the height of antenna is higher than 2m and The Bit

Error Rate (BER) is 10-3, the reliable transmission distances respectively is 3000m

@1200bps, and is 2000m@9600bps.

5. Transparent data transmission

Transparent data interface used in transceivers is for meeting many standard or

nonstandard user protocols. Any false data generated in air can be filtrated

automatically (What has been received is exactly what has been transmitted).

6. Multi-channels

KYL-200L transceivers offer 8 channels, if needed, 16 or 32 channels are available

to satisfy various configuration of communication under user's demand at the same


7. 2 ports with three connection methods

KYL-200L transceivers provide 2 ports with three connections, ports: a UART

interface of TTL level, a non-standard RS-232 port and a non-standard RS-485


8. Big data buffer area

With optional interface baud rate: 1200/4800/9600/19200bps and 8N1/8E1/8O1

data format (set by user), the transceiver can transmit unlimited data frames with

flexible user program.

Note: the RF data rate is only settled down before delivery, please inform our sales

when placing your orders.

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9. Intelligent data control and no any extra programs required
   Even for half duplex communication, no any excessive programs required. All RF
   system data transmission/reception and other On-the-Fly conversion and control are
   performed by KYL-200L transceivers automatically.

10. Lower power consumption & Sleep function
    With +5V power, the receiving current is less than 25mA, the transmitting current
    is less than 300mA, and the sleeping current is less than 20uA.

11. High reliability, small and light
    By using monolithic radio-frequency integrated circuit and single-chip MCU, the
    transceivers have less peripheral circuit s, high reliability, and low failure rate.

12. More options of configurable antennas for user different applications.
13. Watchdog monitor

    Watchdog monitors the inner function, so it can change the traditional product
    structure and also improve the reliability of our modules.

III: Application of KYL-200L:

KYL-200L the low power wireless transceiver data module is suitable for:
* AMR Automatic Meter Reading
* Wireless alarm and security systems
* Building automation, security, wireless monitoring and control of room equipment,

Access Control System;
* Wireless data transmission, automatic data collection system;
* Radio modem can be used for Sports training & competition;
* Wireless dishes ordering;
* Wireless POS, PDA wireless smart terminal;
* RF modem can be used for Electronic bus station and intelligent traffic;
* RF transmitter Wireless electronic display screen and queuing machine;
* Wireless telemetry Charging for parking, parking lot;
* Wireless modem Automobile inspection and four-wheel orientation;
* Wireless sensor Industrial wireless remote control and air conditioning remote
* Data communication used for railway, oil field, dock and army.
* LED display in thruway and public places
* Point to multi-point wireless network, wireless on-the-spot bus and automatic data
collection system;

IV: How to use the KYL-200L

KYL-200L provide RS-232, RS-485 and UART/TTL level interface port for direct
connection with PC, RS485 devices, monolithic processors and other UART
components kinds of applications. The schematic diagram is shown below:

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   1. Power supply
      The factory default setting is +5V(7.5V-12V will inform when placing the
      order).By using better ripple factor, KYL-200L transceivers can also share power
      supply with other equipment. If possible, a voltage-stabilizing chip with 5V voltage
      is more recommended as the only power supply than Switch power supply. But if
      only switch power supply available, the jam by switch pulse to the transceivers
      should be avoided. In addition, the reliable grounding must be used if there is other
      device in the system equipment. In case of failing to connect with the ground, it can
      form its own grounding but must be absolutely separated from the municipal
      electric supply.

   2. Connection Definition with terminal
      KYL-200L transceivers supply one 9-pin connector (JP1), their definitions and
      connection methods with terminals are shown in Table 1.

   Table 1: JP1 Pin Definitions and connection methods

Pin No. Signal Name  Function                           Level   Connection    Remarks
                                                               with terminal
1  GND               Grounding of power supply

2  Vcc               Power supply DC                    5V

3 RxD/TTL Serial data input to the transceiver TTL               TxD

4 TxD/TTL            Transmitted data out of the        TTL      RxD
5  SGND                          Signal

6  A (TXD)           A of RS-485(TxD of RS-232)                  A(RxD)

7  B (RXD)           B of RS-485(RxD of RS-232)                  B(TxD)

8  SLEEP             Sleep control (input)              TTL Sleep signal High level


9  RESET             Reset signal(input)                TTL                   Negative

                                                                              pulse reset

   3. The connection schematic diagram between computer and our

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RF module

4. Setting of channel, interface, and data format
    Before using KYL-200L, the user needs to make simple configuration based on its
    own needs to determine the channel,interface mode and data format. The user can
    change or view the module's interface baud rate, channel and address code.
    Parameter setting or reading as per the testing software KYLCOM in the PC (in
    products box).And the configuration is as follows:

i. Channel configuration:

Channel No.  Frequency    Channel No.  Frequency

1            429.0325MHZ  5            433.0325MHZ

2            430.0325MHZ  6            434.0325MHZ

3            431.0325MHZ  7            435.0325MHZ

4            432.0325MHZ  8            436.0325MHZ

   Note: the frequency points corresponding to each channel can be adjusted
   based on the user's needs.
ii. The schematic diagram of setting the parameter as follows:

      a. Connect the PC and module with RS232 data cable.
      b. Open the "KYLCOM" PC software, select "English" as follows:

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c. Click "open port", then will open a small window as the following picture, clients
   will write the parameters in this windows.

d. Click "read paras".
   "Read correct" show your connection between KYL module and PC is correct.

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If you want to change some technical parameter, you need do as follows.
e. User can change the parameter such as channel and interface

    rate and Parity mode according to actual demand through the button of the left
    window. After writing the parameters in the left catalogue, click the "write para",
    then will show "write correct". So you have finished the process for changing
    technical parameter.

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Note: The RF data rate(Air Rate) can not be set by user, it is confirmed when
placing orders and set before delivery. So please confirm the RF data rate when
placing the order.

5. Installation dimension:

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6. The Function-indicator light
   a. The LED indicator light will glitter red for 0.5S once after switched on.
   b. The LED indicator light will glitter green continually while receiving data from
   c. The LED indicator light will glitter red continuously when transmitting data into
      air after receiving from COM.
   d. If the module enables the sleep function, LED indicator light is always dark.

7. Supported protocol and Transmit capability
   KYL-200L standard transceivers offer transparent protocol to support various
   applications and protocols of users. If the user needs to decrease his cost or ease the
   workload of terminal CPU, we can add other specific functions based on the
   transparent protocol, such as addressing, data acquisition, command interpretation,

8. Sleep function instruction:
   Due to reducing more consumption, KYL-200L transceivers support Sleep function.
   In sleep mode, the current consumption is less than 20uA.

a. How to use the Sleep function:

The Pin8 `SLP' in JP1 is the signal of sleep control. In high power level,

transceiver stays in working mode. In low power level (<0.5V), transceiver stays

in sleep mode. The SLP signal can convert transceiver from working to sleep

mode in 1ms after falling edge. If the Sleep signal arrives when the transceiver is

transmitting data, the module will enter sleep mode after finishing transmission.

From sleep mode to working, it takes the transceiver 1ms after rising edge.

To disable the opened sleep function of KYL-200L, the SLP (SLEEP) pin should

be definitely connected with 0 or ground.

b. Attentions about use of sleep function:

When the sleep function enabled, any supply glitches, such as switch dithering,

fire striking or quick switching on and off, could cause the transceiver to be

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switched to the wrong sleep mode.
After switching on, users can avoid this error by making a compulsive
restoration once after the CPU delays 100ms.
Sleep Timing Diagram:

8. The attentions of data transmission
   a. The delay time (tc) of conversion between transmitting and receiving is less than

Timing diagram:

b. The delay time of transceivers between the first bit sent by TxD to the first
    bit received by RxD.
   Due to a data processing will be made on user's data by KYL-200L transceiver
   using FEC (Forward Error Correction) or other correction algorithm, when RxD
   of a KYL-200L transceiver `A' receives the data, then transmits it, the other one
   transceiver `B' will have a delay (ts) to receive and transmit by TxD. Different
   RF data rate causes different delay time. Please see the specific delay time

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RF Date Rate     Delay   RF Date Rate  Delay
     (bps)       Ts(mS)       (bps)    Ts(mS)
     1200                     9600
                   90                     16
     2400                    19200
                   48                     10

Timing diagram:

c. Error dealing procedure:
   To enhance the reliability and stability of user's systems, a verify bit or a Cyclic
   Redundancy Check (CRC) mode is highly recommended to resent the wrong
   information while using KYL-200L modules.

d. Large-number data transmission
   In theory, when the interface data rate is faster than the RF data rate, KYL-200L
   transceivers can sent unlimited-long data package, but any long packages more
   than 120B are not recommended. The length of each package should be between
   60~100B. We also recommend user to resent the wrong information using
   Automatic Error Request Equipment (ARQ).
  The analyzing as below:
   What if the actual transmission BER (Bit Error Rate) is 10-4, 1 packet with 1KB
   data, which is about 10-thousand bits, is sent, theoretically, at least 1 bit will be
   received wrongly, then the 1KB information will never be received correctly.
   But if we package the data into 10 packets with 100B for each, when all 10
   packets are sent, there will be only 1 packet wrong according to this probability.
   After that, resend this wrong packet using ARQ mode. So by resending one more
   packet and the efficiency rate is reduced 10%, all data will be absolutely received

10. Antenna configuration:
    Many appropriative antennas for low power RF modules are selected for meeting
    different user antenna configurations. Please ask our Sales office for further

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    information about the antenna's dimension and performance.
a. Helical SMA antennas

   KYL-ANT-433-10-SMA: 100mm helical SMA antennas with high gain and low
   cost, reach a long distance.

KYL-ANT-433-3-SMA: 28mm SMA helical antenna with magnetic core, small size,
beautiful appearance (like the mobile phone antenna)

KYL-ANT-433-10-ZSMA: 100mm SMA helical antenna with folding joint, easy for
adjusting the direction and fixing.

b. Magnetic vehicle antenna
   KYL-ANT-O433S-300H1.5-SMA: include magnetic antenna base, suitable for
   equipment with metal shell, easy for fixing, effective to enhance the transmission

More kinds of antenna, please browse our website:
If the user has special demands on antennas, we can design and produce for them

V. Networking Application of KYL-200L

The communication channel of KYL-200L is half duplex, which is most suitable

for the communication mode of point to multi-point. Under this mode, one

master station must be set, and all of the rest are slave stations. A unique address

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      is given to each station. The coordination of communication is controlled by
      master station that uses data frames containing address code to transmit data or
      command. Slave station will receive all of the data and command and compare
      the received address code with local address code. If they are different, the data
      will be deserted without any response. If those address codes are the same, it
      means the data is sent to the local. Slave station will make different responses
      according to the transmitted data or command and send back the data of response.
      All these jobs must be performed by upper protocol, and it is assured that there is
      only one transmitter-receiver in the state of transmission in the communication
      network at any instant moment so as to avoid the cross-interference.
      KYL-200L can also be used for point-to-point communication with easier
      operation. For the programming of serial port, all you have to do is to remember
      that its communication mode is semi duplex while always observing the time
      sequence of come-and-go for receiving and transmitting.

VI. Technical specification of KYL-200L

* Modulation mode: GFSK/FSK
* Working frequency: 400MHz~470MHz, 868MHz, 915MHz;
* Power supply: DC 5V (7.5V~12V informed when placing the order);
* RF power: 500mW, 600mW~1W is available;
* RF data rate: 1200/2400/4800/9600/19200bps (Set before delivery);
* Receive current: <25nA (TTL connect);
* Receive sensitivity: -120dBm (1200bps); -115dBm (9600bps);
* Transmitting current: <300mA;
* Sleep current: <20uA;
* Interface data format: 8E1/8N1/8O1;
* Working humidity: 10%~90% relative humidity without condensation;
* Working temperature: -35~+75( industrial)
* RF Line-of-sight Range: 2000m(BER=10-5@9600bps);

* Size: 53mm*38mm*10mm (without antenna port).

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VII. Description of type


                    Baud Rate

manufacturer  type  12:1200bps





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