PPC907BE101 Protective devices


PPC907BE101 Protective devices
Brand: ABB
Name: Module
Current: 5A
Voltage: 24V
Mode of use: Hot plug implementation
standard: Import
origin: United States

  • Phone:+86 17750010683
  • Whatsapp:+8617750010683


PPC907BE101 Protective devices
PPC907BE101 Protective devices
Module Clips Drive controller servo moto

PPC907BE101 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



FSCA-01 RS-485 Adapter module
701PGNKF Intelligent power module
1606-XLB240E Power module
IC693BEM330 FIP remote I/O scanner
F3YD64-1P YOKOGAWA Transistor output module
F3YD32-1P YOKOGAWA Transistor output module
F3YP12-0V YOKOGAWA Transistor output module
1734-CTM Input/output common terminal module
20P41AD330RA0NNN Three-phase AC driver
1769-SDN DeviceNet Communication module
2080-LC50-24AWB Programmable Logic controller
2080-LC50-24QBB Compact controller
20F1ANC205JN0NNNNN Adjustable frequency AC driver
25A-D043N114 PowerFlex 523 Series compact low voltage driver
22C-D038A103 AC Powerflex 400 drive
BCU-12 Control unit BCU12
FEN-31 68978955 HTL encoder interface
1769-OF4 Analog output module
MPS022 13100-203 Power module
1784-PKTX/A Network interface card
1FK2104-5AF11-1MA0 servo motor
3G3MX2-A4040-ZV1 multifunctional mini frequency converter
2711-K6C5 PanelView Standard Operator Terminal
1769-IF16C Compact I/O mode
Drive ACS880-01-109A-3 ABB
5069-L320ERS2 compact GuardLogix controller
1783-US16T Ethernet unmanaged switch
1783-BMS10CGL Managed Ethernet switch
2198-D020-ERS3 Kinetix 5700 two-axis servo drive
5069-OBV8S Security output module
AL81G ACQUISITIONLOGIC single-channel Analog input board
05701-A-0281 Single channel control card 05701-A-0281
CG6565/64-2L/8TE NMS Media processing board
D0C-16C SAMSUNG Digital Output and counting board
05701-B-0376 HONEYWELL control card module
05701-A-0303 HONEYWELL control card module
1756-OW16I ControlLogix discrete output module
1756-IRT8I ControlLogix Analog input module
1756-EN2TP Allen-Bradley Communication module
1756-OF8H Allen-Bradley analog output module
1756-IF16H Allen-Bradley analog input module
REF615 HBFDACADABC1BNN21G feeder protection and measurement and control device
Pxi-2510 NI PXI signals are inserted into the switch module
AKM34H-ANC2R-00 KOLLMORGEN brushless servo motor
AKM230-ANCNR-00 KOLLMORGEN servo motor
AKM32H-ANC2R-00 KOLLMORGEN servo motor
MPL-B680H-MJ74AA low inertia servo motor
3500/15-02-02-00 Power module
1794-IB32 Flex I/O DC input module
CX5130-0125 Embedded computer processor
MHD115C-035-PG0-AA MHD synchronous motor
PCIe-6734 NI Multifunctional I/ O device
140ERT85410 Multifunctional input module
SPM-D2-101010B/YB 8440-2167 Synchronizer

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