參數(shù)資料
型號(hào)： MC3PHACVP
廠商： MOTOROLA INC
元件分類： 運(yùn)動(dòng)控制電子
英文描述： 3-Phase AC Motor Controller
中文描述： AC MOTOR CONTROLLER, PDIP28
封裝： PLASTIC, DIP-28
文件頁(yè)數(shù)： 39/44頁(yè)
文件大?。?/td> 724K
代理商： MC3PHACVP
MC3PHAC/D
Optoisolated RS232 Interface Application Example
MOTOROLA
3-Phase AC Motor Controller
39
Optoisolated RS232 Interface Application Example
Some motor control systems have the control electronics operating at the same
potential as the high voltage bus. Connecting a PC to that system could present
safety issues, due to the high voltage potential between the motor control
system and the PC.
Figure 19
is an example of a simple circuit that can be
used with the MC3PHAC to isolate the serial port of the PC from the motor
control system.
The circuit in
Figure 19
is the schematic of a half-duplex optoisolated RS232
interface. This isolated terminal interface provides a margin of safety between
the motor control system and a personal computer. The EIA RS232
specification states the signal levels can range from ±3 to ±25 volts. A Mark is
defined by the EIA RS232 specification as a signal that ranges from –3 to –25
volts. A Space is defined as a signal that ranges from +3 to +25 volts.
Therefore, to meet the RS232 specification, signals to and from a terminal must
transition through 0 volts as it changes from a Mark to a Space. Breaking the
circuit down into an input and output section simplifies the explanation of the
circuit.
Figure 19. Optoisolated RS232 Circuit
5
9
4
8
3
7
2
6
1
GND
DTR
TxD
RTS
RxD
D3
1N4148
D2
1N4148
R3
4.7 k
D1
1N4148
R1
1 k
1
2
+
C1
2.2
μ
F/50 V
~+12 V
4
5
U1
4N35
U2
4N35
+5 V
TO MC3PHAC PIN 17
4
5
1
2
R4
330
+5 V
R2
1 k
TO MC3PHAC PIN 16
ISOLATION BARRIER
RS232 ISOLATED
HALF-DUPLEX, MAXIMUM 9600 BAUD
J1
CON/CANNON9
FEMALE
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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MC3PHACVPE 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 8BIT MCU 8K FLASH OTP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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