Shenzhen KYL Communication Equipment Co., Ltd

Fax: +86-755-83408785

sales02@rf-data.com

www.rf-data.com

4

1. Power supply

The factory default setting is +5V (7.5V-12V will inform when placing the

order).By using better ripple factor, KYL-300M 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-300M 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

with terminal

Remarks

1

GND

Grounding of power supply

Ground

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

transceiver

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

sleep

9

RESET

Reset signal(input)

TTL

Negative

pulse reset

3. The connection schematic diagram between computer and our

RF module