PCLD-8710 Wiring Terminal Board User's manual Copyright This documentation is copyrighted 1998 by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd. reserves the right to make improvements in the products described in this manual at any time without notice. No part of this manual may be reproduced, copied, translated or transmitted in any form or by any means without the prior written permission of Advantech Co., Ltd. Information provided in this manual is intended to be accurate and reliable. However, Advantech Co., Ltd. assumes no responsibility for its use, nor for any infringements of the rights of third parties which may result from its use. Acknowledgments PC-LabCard is a trademark of Advantech Co., Ltd. Part No. 2003871000 1st Edition Printed in Taiwan December 1998 Contents Introduction ................................................................ 1 Features ..................................................................1 Applications ................................................................ 2 Board Layout ............................................................. 2 Single-ended Connections ........................................ 3 Differential Connections ........................................... 4 CJC Output (Channel 0) ........................................5 Calibration of the CJC Circuity ............................6 Tec hnical Dia gram .................................................8 chnical Diag Introduction The PCLD-8710 Screw-terminal Board provides convenient and reliable signal wiring for the PCI-1710 and PCI-1710HG, both of which have a 68-pin SCSI-II connector. This screw terminal board also includes cold junction sensing circuitry that allows direct measurement of thermocouples transducers. Together with software compensation and linearization, every thermocouple type can be accommodated. Due to its special PCB layout you can install passive components to construct your own signal-conditioning circuits. The user can easily construct a low-pass filter, attenuator or current shunt converter by adding resistors and capacitors on to the board’s circuit pads. Features • Low-cost screw-terminal board for the PCI-1710 and PCI1710HG with 68-pin SCSI-II connector. • On-board CJC (Cold Junction Compensation) circuits for direct thermocouple measurement. • Reserved space for signal-conditioning circuits such as lowpass filter, voltage attenuator and current shunt. • Industrial-grade screw-clamp terminal blocks for heavy-duty and reliable connections. • DIN-rail mounting case for easy mounting. • Dimensions:169 mm (W) x 112mm (L) x 51mm (H) (6.7" x 4.4" x 2.0")”) PCLD-8710 User's Manual 1 Applications • Field wiring for the PCI-1710 and PCI-1710HG equipped with 68-pin SCSI-II connector. Board Layout PCLD-8710 WIRING TERMINAL BOARD REV.A1 01-1 DIG IN CN1 DIG OUT CN3 CN2 CJC ADJUST VR1 JP0 JP1 CN1: 68-pin SCSI-II connector for connection with the PCI-1710/ PCI-1710HG CN2: 20-pin connector for digital output CN3: 20-pin connector for digital input VR1: Variable resistor for CJC sensing transducer adjustment JP0, 1: Jumpers for CJC setting 2 PCLD-8710 User's Manual Single-ended Connections RAn AIn RBn Cn AIGND Internal side Field side a) Straight-through connection (factory setting) RAn = 0 Ω (short) RBn = none Cn = none b) 1.6 kHz (3dB) low pass filter RAn = 10 kΩ RBn = none Cn = 0.01£gF f3dB = AIn AIGND Internal side Field side RAn AIn Cn AIGND 1 2£kRAnCn Internal side c) 10 : 1 voltage attenuator: RAn = 9 kΩ RBn = 1 kΩ Cn = none Attenuation = where n = 0, 1, 2, ....., 15 RAn AIn RBn RBn RAn + RBn d) 4 ~ 20 mA to 1 ~ 5 VD C signal converter: RAn = 0 Ω (short) RBn = 250 Ω (0.1% percision resistor) Cn = none Field side AIGND Internal side Field side AIn RBn AIGND Internal side Field side PCLD-8710 User's Manual 3 Differential Connections RAn RDn AIn CDn AIn+1 where n = 0, 2, 4, ....., 14 RAn+1 Internal side Field side a) Straight-through connection (factory setting): RAn = 0 Ω (short) RAn+1 =0 Ω (short) RDn = none CDn = none b) 1.6 kHz (3dB) low pass filter RAn = 5 kΩ RAn+1 =5kΩ RDn = none CDn = 0.01£gF f3dB = 1 2£k(RAn +RAn +1 ) CDn RDn RAn + RAn +1 + RDn d) 4 ~ 20 mA to 1 ~ 5 VD C signal converter: RAn = 0 Ω (short) RAn+1 =0 Ω (short) RDn = 250 Ω (0.1% percision resistor) CDn = none 4 PCLD-8710 User's Manual AIn+1 Internal side Field side RAn AIn CDn AIn+1 RAn+1 c) 10 : 1 voltage attenuator: RAn = 4.5 kΩ RAn+1 =4.5kΩ RDn = 1 kΩ Cn = none Attenuation = AIn Internal side Field side RAn AIn RDn AIn+1 RAn+1 Internal side Field side AIn RDn AIn+1 AIGND Internal side Field side CJC Output (Channel 0) The PCLD-8710 provides on-board CJC (Cold Junction Compensation) for thermocouple measurement. Through the setting of jumpers JP0 and JP1 you control disabling of the CJC circuitry and single-ended or differential mode. The jumper settings are as follows: Differential mode, CJC enabled JP0 JP1 AIn AIGND CJC AIn +1 Single-ended mode, CJC enabled JP0 JP1 AIn AIGND CJC AIn +1 CJC disabled JP0 JP1 AIn AIGND CJC AIn +1 where n = 0, 2, 4, ....., 14 PCLD-8710 User's Manual 5 Calibration of the CJC Circuity When the PCLD-8710 leaves our factory it is calibrated. To maintain accuracy, it is necessary to check and calibrate the PCLD-8710 on a regular basis. In order to calibrate the board, you need the following: • A temperature sensor that is connected to the PCLD-8710 • The PCI-1710/1710HG board • A program that can read the PCI-1710/1710HG card Note!: Advantech provides the CJCCAL.EXE program, which allows the user to calibrate the PCLD-8710 easily. • A digital precision thermometer. 1. Jumper settings: Set the jumpers of the PCLD-8710 to single-ended mode: JP0 JP1 Notice that the analog input channel AI0 of the PCI-1710/1710HG should also be set to single-ended mode. 2. Temperature measurement Measure the temperature at the temperature sensor with the digital thermometer. 3. Calculations Use the following formula to calculate the calibration voltage: Vt = 10 (mV/°Κ) x T (°Κ) where Vt: the calibration voltage T : measured temperature in °K, and x °K = (x - 273.2) °C, x≥0 6 PCLD-8710 User's Manual For example, if the temperature is 25°C (298°K ), the calibration voltage would be 10mV x 298 = 2.98 V 4. Data acquisition Use the CJCCAL.EXE program to read the voltage output of the PCLD-8710 to AI0 of the PCI-1710/1710HG. 5. Calibration Adjust the voltage output from VR1of the PCLD-8710 until the voltage output reading corresponds to the environmental temperature. Refer to " Board Layout " on page 2. PCLD-8710 User's Manual 7 Technical Diagram Q2 V+ 1 R 2 V- +12V 3 RJ 68 LM334Z 2 JP0 3 1 J1 3 Q1 LM335 C0 VR1 10K DGND 2 AI0 RA0 1 RB0 1 CD0 JP1 RB1 3 C1 RD0 RA1 2 AIGND 3 AIGND 4 1 2 AI1 C2 AI2 RA2 5 RB2 CD2 RD2 RA3 6 RB3 70 C3 AI3 C4 AI4 AIGND 7 AIGND 8 RA4 9 RB4 CD4 AI0 68 34 AI1 AI2 AI4 67 66 33 32 AI3 AI5 AI6 65 31 AI7 AI8 AI10 64 63 30 29 AI9 AI11 C5 AI5 C6 AI6 AI12 62 28 AI13 RB6 AI14 AIGND 61 27 60 26 AI15 AIGND RB7 DA0_REF 59 58 25 24 DI0 57 56 23 22 DI2 55 21 DA0_OUT AOGND DA1_OUT AOGND C7 AI7 DI1 DI3 C8 AI8 54 53 20 19 DI5 DI7 DI8 52 18 DI9 DI10 51 17 DI11 DI12 50 16 DI13 DI14 DGND DO0 49 48 15 14 DI15 DGND 47 46 13 12 DO1 DO3 45 11 DO5 DO6 44 10 DO7 DO8 DO10 43 9 DO9 42 8 DO11 DO12 DO14 41 7 DO13 40 6 DO15 DGND CNT0_CLK CNT0_OUT 39 38 5 4 DGND 37 36 3 2 35 1 CNT0_GATE +12V CD6 RD6 DA1_REF DI4 DI6 DO2 DO4 RD4 RA5 10 RB5 AIGND 11 AIGND 12 RA6 13 RA7 14 AIGND 15 AIGND 16 RA8 17 RB8 CD8 RB9 C9 C10 RD8 RA9 18 AIGND 19 AIGND 20 AI9 AI10 RA10 21 RB10 CD10 RD10 RA11 22 RB11 C11 C12 AIGND 23 AIGND 24 AI11 AI12 RA12 PACER_OUT TRG_GATE RB12 EXT_TRG +5V RB13 CD12 C13 AI13 C14 AI14 RD12 69 RA13 25 26 AIGND 27 AIGND 28 RA14 29 RB14 CONNECTOR SCSI 68P_4 CD14 RD14 RA15 RB15 C15 30 AIGND 31 AIGND 32 AI15 DA1_REF 33 DA0_REF 34 AOGND 35 AOGND 36 DA1_OUT 37 DA0_OUT 38 AOGND 39 AOGND 40 TB40 8 PCLD-8710 User's Manual