Shenzhen KYL Communication Equipment Co., Ltd

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5. Installation dimension:

6. The Function-indicator light

a. The LED indicator light will turn red for 0.5S once switch on.

b. The LED indicator light will turn green continually while receiving data from

air.

c. The LED indicator light will turn red continually when transmitting data into air

after receiving from COM.

d. If the module keeps sleep function, LED indicator light is always dark.

7. Supported protocol and Transmit capability

KYL-200U 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,

etc.

8. Sleep function instruction:

In order to reduce consumption, KYL-200U 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. At high power level,

transceiver stays in working mode. At 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 move to 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-200U, the SLP (SLEEP) pin

should be definitely connected with 0 or ground.