Omega Engineering OME-A8111 manuale d’uso

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Servicing Nor th America: USA: One Omega Drive, P.O. Box 4047 ISO 9001 Certified Stamford CT 06907-0047 TEL: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Bergar Laval (Quebec) H7L 5A1, Canada TEL: (514) 856-6928 FAX: (514) 856-6886 e-mail: info@omega.ca For immediate technical or application assistance: USA and Canada: Sale[...]

OME-A-8111 Hardware User’s Manual OME-A-8111 Hardware Manual (ver.1.1, Jul/2003) 1[...]

Table of Contents 1. Introduction _________________________________________________________ 4 1.1 General D escriptio n ___________________________________________________ 4 1.2 Features _____________________________________________________________ 4 1.3 Specifica tions _________________________________________________________ 5 1.3.1 Power Consump[...]

2.7.2 A/D Conversion Trigger M odes _______________________________________________ 22 2.7.3 A/D Transfer Modes ________________________________________________________ 23 2.7.4 Using software trigge r and pol ling transfer ______________________________________ 23 2.8 D/A Co nversion ______________________________________________________ 24 2.9 An[...]

1. Introduction 1.1 General Description The OME-A-8111 is a high performance, multif unction (analog and digital I/O) board for the PC AT compatible computer with the ISA bus. The OME-A-8111 provides programmable gain (1, 2, 4, 8 and 16). The OM E-A-8111 contains a 12-bit ADC with up to 8 single-ended analog inputs. The maximum sample rate of the A[...]

1.3 Specifications 1.3.1 Power Consumption z +5V @ 300 mA maxim um z +12V @ 60 mA maxim um z -12V @ 30 mA maxim um z Operating temperature: 0 ° C ~ 50 ° C 1.3.2 Analog Inputs z Channels: 8 single-ended z Input range: (software programmable) Bipolar: ± 5 V, ± 2.5 V, ± 1.25 V, ± 0.625 V, ± 0.3125 V z Input current: 250 nA max (125 nA typical) [...]

1.3.4 DA Converter z Channels : 1 independent z Type : 12-bit multiplying , Analog device AD-7948 z Linearity : ± 1/2 bit z Output Range : 0~5 V or 0~10 V jumper selected , may be used with other AC or DC reference input. Maximum output lim it ± 10V z Output Drive : ± 5 mA z Settling Time : 0.6 microseconds to 0.01% for full scale step 1.3.5 Dig[...]

1.3.7 Programmable Timer/Counter z Type : 82C54 -8 programmable tim er/counter z Counters: The counter1 and counter2 are cascaded as a 32-bit pacer timer. z Pacer output : 0.00047 Hz to 0.5 MHz z Input Gate : TTL compatible z Internal Clock : 2 MHz 1.3.8 Applications z Signal analysis z FFT & frequency analysis z Transient analysis z Production[...]

2. Hardware Configuration 2.1 Board Layout BB ADS- 7 74 ON 123456 JP1 JP2 8111 SW1 987654 () A BASS ADDRESS A1 P1 A31 12 19 20 CN3 D/ C OUT CN2 D/ C I N 20 2 1 19 ANA I/0 CN1 VR1 VR2 VR3 VR4 VR5 OME-A-8111 Hardware Manual (ver.1.1, Jul/2003) 8[...]

2.2 I/O Base Address Setting The OME-A-8111 occupies 16 consecutive locations in I/O address space. The base address is set by DIP switch SW1. The default address is 0x220 as shown below: A 9 A 8 A 7 A 6 A 5 A 4 6 5 4 3 2 1 ON SW1 : BASE ADDRESS BASE ADDR A9 A8 A7 A6 A5 A4 200-20F OFF ON ON ON ON ON 210-21F OFF ON ON ON ON OFF 220-22F( ; ) OFF ON O[...]

The PC I/O port mapping is given below. ADDRESS DEVICE ADDRESS DEVICE 000-1FF PC reserved 320-32F XT Hard Disk 200-20F Game/control 378-37F Parallel Printer 210-21F XT Expansion Unit 380-38F SDLC 238-23F Bus Mouse/Alt. Bus Mouse 3A0-3AF SDLC 278-27F Parallel Printer 3B0-3BF MDA/Parallel Printer 2B0-2DF EGA 3C0-3CF EGA 2E0-2E7 AT GPIB 3D0-3DF CGA 2E[...]

2.4 I/O Register Address The OME-A-8111 occupies 16 consecutive PC I/O addresses. The following table lists the registers and their locations. Address Read Write Base+0 8254 Counter 0 8254 Counter 0 Base+1 8254 Counter 1 8254 Counter 1 Base+2 8254 Counter 2 8254 Counter 2 Base+3 Reserved 8254 Counter Control Base+4 A/D Low Byte D/A Channel 0 Low By[...]

2.4.1 The 8254 Counter The 8254 Programmable tim er/counter has 4 registers from Base+0 through Base+3. For detailed programming inform ation about the 8254, please refer to Intel‘s “Microsystem Components Handbook”. Address Read Write Base+0 8254 Counter 0 8254 Counter 0 Base+1 8254 Counter 1 8254 Counter 1 Base+2 8254 Counter 2 8254 Counter[...]

2.4.3 D/A Output Latch Register (WRITE) Base+4: Channel 1 D/A Low Byte Data Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 D7 D6 D5 D4 D3 D2 D1 D0 (WRITE) Base+5: Channel 1 D/A High Byte Data Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 X X X X D11 D10 D9 D8 D/A 12 bit output data: D11…D0, D11 = MSB, D0 = LSB, X = don‘t care T[...]

2.4.5 Clear Interrupt Request (WRITE) Base+8: Clear Interrupt Request Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 X X X X X X X X X = don‘t care, XXXXXXXX = any 8 bit data is valid If OME-A-8111 is working in the interrupt transfer mode, an on-board hardware status bit will be set after each A/D conversion. This bit must be cleared by [...]

2.4.7 A/D Multiplex Control Register (WRITE) Base+A : A/D Multiplexer Control Register Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 X X X X X D2 D1 D0 A/D input channel selection data =3 bits: D2...D0, D2=MSB, D0=LSB, X=don‘t care Channel Bit_2 Bit_1 Bit_0 0 0 0 0 1 0 0 1 2 0 1 0 3 0 1 1 4 1 0 0 5 1 0 1 6 1 1 0 7 1 1 1 NOTE: The settlin[...]

2.4.8 A/D Mode Control Register (WRITE) Base+B : A/D Mode Control Register Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 X SI2 SI1 SI0 X D2 D1 D0 X=don‘t care Mode Select Trigger Type Transfer Type D2 D1 D0 Software Trig Pacer Trig Software Interrupt 0 0 0 Select X Select X 0 0 1 Select X Select X 0 1 0 X Select X X 1 1 0 X Select Select[...]

The pacer trigger can control the sampling rate very precisely. So the converted data can be used to reconstruct the waveform of the analog input signal . In pacer trigger mode, the pacer timer will periodically generate trigger signals to the A/D converter. This converted data can be transfer to the CPU by polling or interrupt or DMA transfer meth[...]

2.4.10 D/O Output Latch Register (WRITE) Base+D: D/O Output Latch Low Byte Data Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 D7 D6 D5 D4 D3 D2 D1 D0 (WRITE) Base+E: D/O Output Latch High Byte Data Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 D15 D14 D13 D12 D11 D10 D9 D8 D/O 16 bits output data: D15...D0, D15=MSB, D0=LSB The OME[...]

2.5 Digital I/O The OME-A-8111 provides 16 digital input channels and 16 digital output channels. All levels are TTL compatible . The connections diagram and block diagram are given below: Read Read D0...D7 Base+D Base+E D0...D7 D8...D15 1...8 9...16 Output Latch Register Output Latch Register CN3 17...18 DGND DGND DO TTL 16-Channel Isolated Input [...]

2.6 8254 Timer/Counter The 8254 Programmable tim er/counter has 4 registers from Base+0 through Base+3. For detailed programming inform ation about 8254, please refer to Intel‘s “Microsystem Components Handbook”. The block diagram is as below. Cin: clock input Cout: clock output INTCLK: internal clock Cin Gate Cout Counter 0 Cin Gate Cout Cou[...]

2.7 A/D Conversion This section explains how to perfor m A/D conversions. The A/D conversion can be performed by software trigger by pacer trigger. At the end of the A/D conversion, it is possible to transfer data by polling and interrupt before using the A/D conversion func tion; users should notice the following issues: z A/D data register, BASE+[...]

2.7.1 A/D conversion flow Then the user must decide which A/D convers ion m ode will be used. The software driver supports three different modes. The user can control the A/D conversion by polling mode very easily (sec. 2.4.9) . It is recommended to use the softwa re driver if using interrupt or DMA mode. The analog input signals come from CN1. The[...]

2.7.3 A/D Transfer Modes OME-A-8111 supports two transfer m odes. 1 : polling transfer : This mode can be used with all trigger mode s. Detailed information is given in section 2.4.8.The software scans A/D high byt e data register, BASE+5, until READY_BIT=0.The low byte data is also ready in BASE+4. 2 : interrupt transfer : This mode can be used wi[...]

2.8 D/A Conversion The OME-A-8111 provides two 12-bit D/ A converters. Before using the D/A conversion function, user should notice the following issues: z D/A output register, BASE+4/BASE+5/BASE+6/BASE+7 (sec. 2.4.3) . z JP1/JP2 selects internal/external reference voltage (sec. 2.4.1) . NOTE: The DA output latch registers are de signed as a “dou[...]

2.9 Analog Input Signal Connection FIG 1: Connecting analog input configuration A/D CHn OME-A-8111 AGND A/D CH0 Es Signal Shielding z Signal shielding connections are shown in Fig1. z Use single-point connection to frame ground (not AGND or DGND) Frame Ground OME-A-8111 AGND DGND Vin OME-A-8111 Hardware Manual (ver.1.1, Jul/2003) 25[...]

2.10 Pin Assignment The OME-A-8111 provides three connect ors. Connect 1, CN1 functions for analog input & analog output input. Connector 2, CN2, f unctions as 16 digital outputs. Connector 3, CN3, function as a digital output. CN1/CN2/CN3 Pin Assignment CN1: Analog input/Analog output /Connect Pin Assignment. Pin Number Description Pin Number [...]

CN2: Analog input/Analog output /Connect Pin Assignment. Pin Number Description Pin Number Description 1 Digital Input 0/TTL 2 Digital Input 1/TTL 3 Digital Input 2/TTL 4 Digital Input 3/TTL 5 Digital Input 4/TTL 6 Digital Input 5/TTL 7 Digital Input 6/TTL 8 Digital Input 7/TTL 9 Digital Input 8/TTL 10 Digital Input 9/TTL 11 Digital Input 10/TTL 12[...]

2.11 Daughter Board The OME-A-8111 can be connected with many different daughter boards. The function of these daughter boards is described as follows. 2.11.1 OME-CA-4002 The OME-CA-4002 is a 37-pin D-Sub male connect or. It can directly connect to a 37-pin D-sub connector. 2.11.2 OME-DB-16P The OME-DB-16P is a 16-channel isolated digital input boa[...]

3. Calibration The OME-A-8111 is calibrated to its best stat e of operation. For environments with large vibration, recalibration is recommended. Befo re calibrating the OME-A-8111, users should have the following items: z One 6-digit multi-meter. z One stable voltage source (4.9988V) z Diagnostic program: this program is included in the delivered [...]

3.2 D/A Calibration Steps 1. Run A8111CAL.EXE 2. Connect D/A channel0,, pin 30 of CN1 to DVM 3. Adjust VR1 until DVM=5.0000V 4. Press “Enter" key 5. Adjust VR2 until DVM=0.0000V 3.3 A/D Calibration Steps 1. Press “Enter" key 2. Connot A/D Channel 0 to analog ground, CN1-Pin1 to CN1-Pin20. 3. Input stable DC 4.9988V to A/d channel 1, p[...]

W ARRANTY / DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. O MEGA ’ s W ARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA ’ s cust[...]

M4029/0104 Where Do I Find Ever ything I Need for Pr ocess Measurement and Control? OM EGA…Of Course! Shop online at www .omega.com TEMPERA TURE   Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies   Wire: Thermocouple, RTD & Thermistor   Calibrators & Ice Point References   Recorders, C[...]