Shenzhen KYL Communication Equipment Co., Ltd
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-220 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
I/O
1
2
GND
Vcc
Grounding of power supply
Power supply DC
-
-
Level
-
3.1~5.5V
Remarks
RS232 TXD
3
TTL
TXD
Data Transmission
Data Transmission
RS485 A
Data Receiving
Data Receiving
RS485 B
Signal Ground
-
O(output)
O(output)
IO
I(input)
I(input)
IO
-
-
RS232
TTL
-
RS232
TTL
-
-
-
RS485 A
RS232 RXD
4
TTL RXD
RS485 B
5
6
DGND
NC
Other power
supply need
customized
Choose one
of the three
interface
ports
Choose one
of the three
interface
ports
3. The connection schematic diagram between computer and our RF module
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sales02@rf-data.com
www.rf-data.com
KYL [ SHENZHEN KYL COMMUNICATION EQUIPMENT CO,LTD. ]
