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參數(shù)資料
| 型號： | PS2000ACQ |
| 英文描述： | A Network Communication Controller Designed to Connect Any MCU Application System To A Gateway(單片網(wǎng)絡(luò)通信控制器,用于控制MCU和網(wǎng)絡(luò)服務(wù)器之間的信息交換) |
| 中文描述： | 通信控制器的網(wǎng)絡(luò)連接任何設(shè)計單片機應用系統(tǒng)到一個網(wǎng)關(guān)（單片網(wǎng)絡(luò)通信控制器，用于控制微控制器和網(wǎng)絡(luò)服務(wù)器之間的信息交換） |
| 文件頁數(shù)： | 35/54頁 |
| 文件大小： | 594K |
| 代理商： | PS2000ACQ |
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PS2000A Datasheet
Doc. Number:
TECINHD001
Version 1.0
3/1/2002
P&S DataCom Corporation
31
Multiple PS2000A’s may be connected to the RS-485 bus, and together with the network
server to form an RS-485 net. Within this net, the maximum amount of PS2000A’s is
63, as shown in Figure 22.
Figure 22 Multiple PS2000As and a Network Server form an RS-485 net
10.3.3 Modem Mode
The PS2000A provides a communication interface for the standard Modem, therefore the
PS2000A may use the standard Modem to communicate with the Modem of the network
server via Public Switch Telephone Network (PSTN), as shown in Figure 23.
Figure 23 The simplified diagram of interface circuit between PS2000A and
standard Modem with the external RS-232 driver/receiver
The PS2000A provides the RTS and CTS signal lines of a standard Modem, but may not
use them actually. These two lines should be shorted.
Modem Set in Call Mode
The MCU application system may set the Modem of the PS2000A in call mode, while
the MCU should send the telephone number to the PS2000A. The PS2000A will
connect to the network server by dialing this telephone number.
The PS2000A dials to call the Modem of the network server. If the Modem does not
answer within 30 seconds, this action fails. If the Modem of the network server answers
but the PS2000A has not connected to the network server successfully within 30 seconds,
then the current action also fails.
MCU
Application System
1
Network Server
A
B
PS2000A
PS2000A
PS2000A
…
DCE
Standard Modem DB9
R2OUT
R2IN
R1OUT
R1IN
PS2000A
DCD
RXD
TXD
DTR
5
4
9
3
8
2
7
1
6
Note: The RS-485 interface circuit is not shown in the Figure
MCU
Application System
2
MCU
Application System
N (N
≤
63)
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