APBU-44C 64669982 Protective devices


APBU-44C 64669982 Protective devices
Brand: ABB
Name: Module
Current: 5A
Voltage: 24V
Mode of use: Hot plug implementation
standard: Import
origin: United States

  • Phone:+86 17750010683
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APBU-44C 64669982 Protective devices
APBU-44C 64669982 Protective devices
Module Clips Drive controller servo moto

APBU-44C 64669982 Protective devicesSuitable for steel manufacturing, thermal power generation, hydroelectric power generation, nuclear power generation, wind power generation, gas supply, and other glass manufacturing, paper mills, mechanical manufacturing, electronic manufacturing, automotive manufacturing, aviation manufacturing, chemical manufacturing, coal mining and selection, oil and natural gas mining and selection, metal mining and selection, and non-metallic mining and selection

3 Basic characteristics and typical applications of ADS7846

3.1 Basic features

ADS7846 is a 4-wire touch screen controller produced by Analog Devices. It is currently widely used in resistive touch screen input systems.
The ADS7846 digital converter operates in a 12-bit successive approximation comparison register (SAR) ADC architecture integrating low-pass
impedance switches for driving touch screens. These devices do not use an internal reference voltage and consume less than 1.4mW maximum
power when operating at a throughput rate greater than 125kp/s. They also have 10keV to 12keV analog input ESD protection for enhanced ESD immunity to
avoid damage to critical internal system components. Operates from a single 2.2V to 5.25V supply. A complete operation of the AD7846 serial interface requires
24 DCLKs., former 8 pulses receive 8-bit commands, and start sampling on the rising edge of the 6th pulse. Starting from the 9th pulse, it enters the conversion phase, outputs a
12-bit sample value, and enters the idle phase after the conversion. Until the end of 24 DCLKs, CS Set to high level, one measurement ends.

3.2 Interface circuit and coordinate value acquisition of resistive touch screen

Figure 3 shows the interface circuit between ADS7846 and PhilipsARM7 chip LPC2210.

The ADS7846 chip switches the on-chip analog electronic switch, connects the X+ (Y+) terminal to the positive power supply VCC
, connects the X- (Y-) terminal to the ground, and connects the X+ (Y+) and X- (Y-) terminals to A in differential form /D converter input.

When a pen is used to click on different positions of the touch screen, due to the different voltages input to the A/D converter (see the previous voltage dividing principle), the output
value of the pen touch point is obtained after A/D conversion, and the output value is the same as the pen touch point. position has an approximately linear relationship. Therefore, the
ADS7846 can obtain the relative position of the pen touch point on the touch screen.

3.3 Causes of errors and elimination methods

The main reasons that affect the accuracy of coordinate values ​​are:

① The uniformity of the resistive material of the touch screen itself may cause uneven voltage division due to material uniformity issues, which will inevitably affect the accuracy of the output.

②The jitter problem of touch during pressing and releasing.

③The internal resistance of the ADS7846 analog switch and the conversion accuracy of the A/D converter itself.

④ESD interference problem.

Problems ① and ③ are inherent problems of the device and cannot be eliminated. For the second problem, the key vibration can be reduced through software. A better method is to use two
key value comparisons. The specific working principle is to continuously measure the X and Y coordinate values ​​twice, and then compare them. If they are the same or the difference is
within the allowed error range, it is considered a valid key, otherwise it is invalid. key.

Regarding the ESD problem, this is the main problem faced during design. The specific measures are mainly as follows:

(1) The analog ground of ADS7846 is not connected to the digital ground of the system at one point. Digital interference is coupled to the analog ground of the ADS7846 by the common
impedance, causing interference and causing jitter. The solution is to connect analog ground to digital ground at one point.

(2) The successive comparison A/D converter of the ADS7846 is very sensitive to power supply and digital writing. The solution is to place a 10μF bypass capacitor near the power pin and a
0.1μF bypass capacitor at the reference voltage input terminal. circuit capacitance.

(3) In situations where electromagnetic interference is relatively strong, in order to prevent the high-frequency interference pulses generated by the touch screen pins from interfering with the
ADS7846, a 0.001μF high-frequency rectifier capacitor should be connected to the key pins DCLK, DIN, and DOUT to ground . When wiring the PCB, the connection from the screen to the chip should also be short and thick.

Contact: Mr. Lai
Whats app:+86 17750010683
Skype:+86 17750010683
QQ: 3221366881



F7126 HIMA F 7126 power module
F7130A HIMA F 7131 power module
F7126 HIMA F 7126 power module
F8653X HIMA F8653X Central module
F8651X HIMA F8651X controller module
F8652X HIMA safety-related CPU
F8652X HIMA F 8652X safety-related CPU
F8653X HIMA F8653X Central module
B5233-2 HIMA B 5233-2 Assembly kit
B5233-1 HIMA B 5233-1 Assembly kit
B5231 HIMA B 5231 Assembly kit
B4237-2 HIMA B 4237-2 Assembly kit
B4237-1 HIMA B 4237-1 Parts of the assembly kit
B4235 HIMA B 4235 Assembly kit
B4233-2 HIMA B 4233-2 Parts of the assembly kit
SPBRC410 ABB Analog output module
SPASO11 ABB Analog output module
SPAJ140C-CA  ABB Overcurrent and Ground Fault Relays
SNAT7640 3BSE003195R1 ABB Sell Control System Parts
YPK111A/YT204001-HH ABB control system parts
YPK107E/3ASD489301A410  ABB control system parts
YPI103E/YT204001-FB ABB off-the-shelf module
YPG111A 3ASD273001B1 ABB terminal interface
YPG110E YT204001-FD/1  ABB off-the-shelf module
DCF1048880P0001 YPC111B ABB YPC 111B adapter module
YL681001-AB  ABB speed terminal
XZ727A-E GJR2323300R0001 ABB Bailey module
XV C768 AE102 ABB XVC768AE102 adapter module
XT376A-E HEIE420158R1 ABB module
B4231 HIMA B 4231 system module
XR8981V3 HEIE431105P1 ABB adapter module
XT377E-E HESG446624R1 ABB module
UT735A-E GJR2328100R0001 ABB adapter module
UT635A-E GJR2910300R0001 ABB Programmable Control System
ZMU-02  3AUA0000151291 ABB Inverter memory card
3AUA0000040000 RUSB-02 ABB Laptop Cable Kit
UAD142A01 3BHE012551R0001 ABB Extended output power supply
REU615 ABB Voltage Protection and Control Relays
UNITROL 1020 UNS0119A-Z,V1 3BHE030579R0003 ABB Excitation System
SPHSS03 ABB Hydraulic Servo Module
REM615E_1G HBMBCAAJABC1BNN11G ABB Feeder Protection and Control Relays
UAD155A0111 3BHE029110R0111 ABB Distributed Control System Module
CS513 3BSE000435R1 ABB communication interface module
SC510 3BSE003832R1 ABB communication module
PM511V08 3BSE011180R1 ABB processor module
PFSA140 3BSE006503R1 ABB Roll Supply
DSDX452L ABB S400 input/output
SD812F 3BDH000014R1 ABB power module
07DC92 GJR5252200R0101 ABB I/O module
DSPU131 3BSE000355R1 ABB MA200 interface board
ICSI16E1 FPR3316101R0034 ABB binary input unit
EHDB280 ABB power contactor
UDC920AE01 3BHE034863R0001 ABB power module
REX521GHHGSH51G ABB Feeder protection device
LDSTA-01 ABB motor driver
GFD563A101 3BHE046836R0101 ABB central processing unit
3HAC025338-006  ABB Main Servo Drive Unit
SD24D/492896201 ABB Expansion unit
5SGX1060H0003 ABB igct module
5SHY3545L0020 3BHE014105R0001 ABB Thyristor IGCT module
SDCS-FIS-3A DCF803-0035 ABB excitation plate
DCF803-0050 DCF503B0050 DCF503A0050 ABB Excitation module

Company advantage service:
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
All kinds of module card driver controller servo motor servo motor embedded card wires and cables Power module control module is applicable to steel, hydropower, nuclear power, power generation, glass factory, tire factory, rubber, thermal power, paper making, shipping, navigation, etc

ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit

Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts