4I20 POWER DRIVER MANUAL
Contents
1. RN9 R20 a a 1 Page 10 4120 USER S MANUAL INSTALLATION GENERAL When the 4120 has been properly configured for its application it can be inserted into a PC 104 stack The standoffs should then be tightened to secure the 4120 in its place When the 4120 is secured in the stack the 50 pin header can be plugged in from the side HO CONNECTOR ORIENTATION The 50 pin connector on the 4120 has its pin one end marked with a white square on the circuit card This corresponds with the red stripe on typical flat cable assemblies If more positive polarization is desired center polarized IDC header connectors should be used These connectors will not fully mate with the pins on the 4120 if installed backwards A suggested center polarized 50 pin IDC header is AMP PN 1 746285 0 Page 11 4120 USER S MANUAL OPERATION BIT ADDRESSING All 4120 access is through a single I O location The 4120 occupies four locations in I O space but the 3 additional addresses are merely duplicates of the first The 4120 register bit functions are as follows EA RAE AEE EE DATA POWER WRITE BSEL4 BSEL3 BSEL2 BSEL1 BSELO POWER ON Before any I O access can occur the 4120 isolated power must be turned on This is done by setting the POWER bit high D6 In order to guarantee a controlled startup with all outputs2. U8 u10 C18 W2 W3W4 un c20 WS W6 W7W8 W9 me 022 C23 CR4 R16 U14 R19 C24 gd Q R18 C26 ii RN7 RNB n CR5 H Z S vis 2 U17 Page 6 4120 USER S MANUAL CONFIGURATION BASE ADDRESS SELECTION The base I O address of the 4120 card is selected by placing shorting jumpers on jumper blocks W2 through W9 The 4120 occupies 4 contiguous locations in I O space Jumper blocks W2 through W9 have three pins and two valid shorting jumper locations up and down The position ofjumpers on W2 through W9 is a binary representation of the 4120 base address When a jumper is in the up position it matches a high address line The following table shows some example base address settings ADDRESS W2 W3 W4 WA W6 W7 ws W9 A9 AS A7 A6 AS A4 A3 A2 0300H up up down down down down down down 0294H up down up down down up down up 0368H up up down up up down up down 0320H up up down down up down down down Page 7
3. and never fully turn on the load The rule of thumb for incandescent lamps states that the inrush current is about 10 times the steady state current This means that the 4120 will reliably drive incandecent lamps with a 80 mA current rating One way to drive larger lamps is to provide a preheat resistor that supplies about 25 of the nominal lamp current continuously This reduces the inrush current and also increases the lamp life The preheat resistor can be driven from another 4120 output iflow operating power is important 4120 outputs can also be paralleled to drive larger lamps Page 13 4120 USER S MANUAL Page 14 4120 USER S MANUAL OPERATION CONNECTOR PIN OUT The 4120 50 pin I O connector pinout is as follows P1 CONNECTOR PIN SIGNAL PIN SIGNAL 1 VO bit 0 25 I O bit 12 3 VO bit 1 27 VO bit 13 5 VO bit 2 29 I O bit 14 7 VO bit 3 31 VO bit 15 9 VO bit 4 33 I O bit 16 111 VO bit 5 35 VO bit 17 13 I O bit 6 37 I O bit 18 15 I O bit 7 39 I O bit 19 17 I O bit 8 41 T O bit 20 19 VO bit 9 43 I O bit 21 21 I O bit 10 45 I O bit 22 23 VO bit 11 47 I O bit 23 49 Pullup power All even pins are grounded Note that this pinout is compatible with I O module racks Page 15 4120 USER S MANUAL OPERATION 4120TEST A simple test program is supplied with the 4120 for functional testing and verification This program is called 4I20TEST EXE 4120TEST performs a rotating bit test of all 24 I O bits You must n
4. 4120 POWER DRIVER MANUAL Version 1 0 Copyright 1997 by MESA ELECTRONICS Richmond CA Printed in the United States of America All rights reserved This document and the data disclosed herein is not to be reproduced used disclosed in whole or in part to anyone without the written permission of MESA ELECTRONICS Mesa Electronics 4175 Lakeside Drive Suite 100 Richmond CA 94806 1950 Tel 510 223 9272 Fax 510 223 9585 E Mail tech mesanet com Website www mesanet com 4120 USER S MANUAL TABLE OF CONTENTS HANDLING PRECAUTIONS SLAUC electricity AE SIS e 3 INTRODUCTION General er eik E n a mda Louk aun O AA DE A de E i 4 CONFIGURATION General IS aa eakal aa a alai 5 Default jumper selli EE 5 Baseaddressseleetioti ullu saa cee ka ais aa tata i a e Bara 7 Pulluppower jumpers ss losas dvds 9 INSTALLATION General u al ask A au aya cues 11 JAO EOMEEAOLOHEMAHOMA oa c kaeva EE EE Mens be ca 0 i d ii da 11 OPERATION Bit addressing ks A A AA AAA A AAA talu geek nets 12 POWE Oleri a a a a 80 a fo 03 0300418 a ku cds 12 Writing output DIS seci e int ce ma a s a at E a li Au aaa 12 Reading gl EE 13 SHO CICUI prot CtI fhu u a A ule a des 13 Connector pinouts 2 e EE a ts 14 APOTES sche snes shear ee enone bt Wa a aaa 15 REFERENCE INFORMATION SPCCINCAUONS SE all d EE EE a Beds eg 16 Warranty mats nce d Si dean d Sia d Did opt ati pd eo aci dida at ad cip indie doe cass 17 SCHEmMatic E EE 19 4120 USE
5. 4120 USER S MANUAL CONFIGURATION BASE ADDRESS JUMPERS CRI E Ci o o 2 Q R3 C4C5 RIC6 C2 RNIRN2 5 R6 Us C13 T3 C14 U10 c18 W2 W3W4 un C20 W5W6W7W8 W9 U G22 RN6 apd 025 Sr a a z E R19 C24 L OI R18 col ii E RN7 RNB d AT CR5 LL D O 2 RN9 R20 a Page 8 4120 USER S MANUAL CONFIGURATION PULLUP POWER JUMPER Pin 49 on the 4120 I O connector is connected to the output pullup resistor common It can either be connected to the isolated 5V supply on the 4120 or powered externally If external power is used jumper W1 must pe placed in the right hand position The externally supplied voltage must be within the ou
6. R S MANUAL HANDLING PRECAUTIONS STATIC ELECTRICITY The CMOS integrated circuits on the 4120 can be damaged by exposure to electrostatic discharges The following precautions should be taken when handling the 4120 to prevent possible damage A Leave the 4120 in its antistatic bag until needed B All work should be performed at an antistatic workstation C Ground equipment into which 4120 will be installed Droumandlipersonnelitionductibeaceldtrougk gohrasistov ground E Avoid wearing synthetic fabrics particularly Nylon 4120 USER S MANUAL INTRODUCTION GENERAL The 4120 is a stackable PC 104 card with 24 open drain 350 mA outputs for solenoids valves relays motors incandescent lamps and other medium power DC loads The 4120 outputs are galvanically isolated from logic ground to avoid ground loops as the total ground return current be as much as 8 4 amps The isolation also allows the 4120 to drive ground referred loads The 4120 has readback capability on all outputs to verify output switching and allow unused outputs to be used as input bits The output drivers on the 4120 TI TIPC6A259 have a built in 800 mA current limit and are protected against short circuits and capacitive loads with a unique chopping current limit system The outputs have built in 50V clamp diodes to allow driving inductive loads without external flyback diodes The 4120 output connector is a 50 pin header with I O module compatible p
7. ata from the 4120 The DATA bit D7 reflects the status of the selected I O bit at the time the command byte was written To poll an input bit you must repeat the write read sequence A low DATA bit indicates an off output state ora high input A high DATA bit indicates an on output state or a low input To use an I O bit as an input you must make sure that the output driver for that I O bit is off SHORT CIRCUIT PROTECTION The output driver ICs that the 4120 uses have built in short circuit protection This protection logic causes the output drivers to start chopping the output drive if the output current exceeds 800 mA The chopped output duty cycle is about 2 This effectively constitutes foldback current limiting Because of this characteristic capacitive and incandescent lamp loads may turn on more slowly than expected or not turn on at all It is possible to detect whether an output driver is current limiting by repeatedly reading the output status INCANDESCENT AND CAPACITIVE LOADS The built in short circuit protection that the driver chips use limits the maximum size of loads that exhibit a larger inrush current than operating current Some loads that exhibit this effect are capacitive loads DC motors and incandescent lamps To reliably drive these loads the inrush current should not exceed the 800 mA short circuit limit of the chip If this limit is exceeded the driver chip will not be damaged but may stay in the chopping mode
8. he warrantor s examination discloses to its satisfaction that the product was defective The warrantor may at its option replace the product in lieu of repair With regard to any product returned within 2 years of purchase said repairs or replacement will be made without charge If the failure has been caused by misuse neglect accident or abnormal conditions of operation repairs will be billed at anominal cost RSS THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY FITNESS OR ADEOUACY FOR ANY PARTICULAR PURPOSE OR USE MESA ELECTRONICS SHALL NOT BELIABLE FOR ANY SPECIAL INCIDENTAL OR CONSEOUENTIAL DAMAGES WHETHER IN CONTRACT TORT OR OTHERWISE If any failure occurs the following steps should be taken 1 Notify Mesa Electronics giving full details of the difficulty On receipt of this information service data or shipping instructions will be forwarded to you 2 On receipt of the shipping instructions forward the product in its original protective packaging transportation prepaid to Mesa Electronics Repairs willbe made at Mesa Electronics and the product returned transportation prepaid Page 18 4120 USER S MANUAL Page 19
9. inout interleaved grounds allowing the 4120 to drive unbuffered OPTO 22 style I O module racks All outputs have optional plug in pullup resistors that can be powered from the isolated 5V power on the 4120 or external power The 4120 input and output are organized as a 24 bit multiplexer and a 24 bit addressable latch This allows simple addressing of single I O bits All 4120 access is through a single 8 bit I O port Page 4 4120 USER S MANUAL CONFIGURATION GENERAL The 4120 port address and I O power connection options are set with jumpers Each group of jumpers will be discussed separately by function In the following discussions when the words up down right and left are used it is assumed that the 4120 I O card is oriented with its bus connectors J1 and J2 at the bottom edge of the card nearest the person doing the configuration DEFAULT JUMPER SETTINGS Factory default 4120 jumpering is as follows FUNCTION JUMPER S SETTING 4120 power option Wi T O conn pin 49 Local power 4120 Base address W2 W3 W4 W5 0300H W6 W7 W8 W9 Page 5 4120 USER S MANUAL CONFIGURATION DEFAULT JUMPER SETTINGS RNI RN2 d R6 U4 CU TI C14
10. ot havel O cable attached to the 4120 when running this test 4120TEST is invoked with the 4120 base address in hex on the command line AI20TEST 300 Would test the 4120 at the default 0300H base address 4120TEST prints a every good pass and can be aborted by pressing any key Page 16 4120 USER S MANUAL REFERENCE INFORMATION SPECIFICATIONS MIN MAX UNIT POWER SUPPLY Voltage 4 5 3 5 V Supply current 50 mA no ext load BUS LOADING Input capacitance 15 pF Input leakage current 5 uA Output drive capability 150 pF Output sink current 12 mA UO BIT SPECIFICATIONS Input logic low 3 8 V Input logic high 2 0 48 V Output on state voltage 5 V 350 mA sink Output off state voltage 48 V ENVIRONMENTAL Operating temperature range I version 40 85 C C version 0 70 G Relative humidity 0 90 Percent Non condensing Page 17 4120 USER S MANUAL REFERENCE INFORMATION WARRANTY Mesa Electronics warrants the products it manufactures to be free effects in material and workmanship under normal use and service for the period of 2 years from date of purchase This warranty shall not apply to products which have been subject to misuse neglect accident or abnormal conditions of operation In the event of failure of a product covered by this warranty Mesa Electronics will repair any product returned to Mesa Electronics within 2 years of original purchase provided t
11. tput voltage rating of the 4120 48V With no external load the outputs will swing up to 2 VIN 5 3 5 volts To use local power W1 is placed in the left hand position If local power is used unloaded outputs will swing to 5V The isolated power can be used to supply a very small SmA amount of isolated 5V power if desired This power is available on pin 49 of the I O connector Make very sure that you do not apply power to pin 49 of the I O connector if you have the local power option enabled W1 left This can destroy the 4120 card Page 9 4120 USER S MANUAL CONFIGURATION PULLUP POWER JUMPER RNIRNZ b R6 DI U6 U8 RIO LU C15 7 3 d o oS U10 C18 W2 WIW4 un CO W5 We W7W8 W9 Un 020 3 CR4 529 R19 C24 01 R18 leen Y H RNZRNB n
12. turned off it is necessary to follow a predermined 5 byte write sequence when powering up the 4120 write OOH Put output latch in known state write 40H Turn on 4120 isolated power Wait a minimum of 1mS for power to come up write FFH Do dummy write to no op bit write 40H leave power on but toggle all other bits write DFH Do dummy read All subsequent writes to the 4120 should have the POWER bit set Ifthe power bit is ever cleared the 5 byte starup sequence must be repeated WRITING OUTPUT BITS Any 4120 output driver bit can be set or cleared with a single byte write to the 4120 To write to an output bit you write acommand byte to the 4120 that 1 Specifies the desired output bit with the BSEL bits bits 0 through 4 2 Specifies the desired output state with the DATA bit D7 3 Has the WRITE D5 and POWER D6 bits set Output bits written with D7 high are set turned on output bits written with D7 low are cleared turned off Writes to bits 24 through 31 have no effect Page 12 4120 USER S MANUAL OPERATION READING INPUT BITS The 4120 can read the status of its output bits This can be use to verify output switching or allow unused outputs to be used as inputs Reading inputs is a two step process First you write a command byte to the 4120 that 1 Specifies the desired input bit with the BSEL bits bits 0 through 4 2 Has the WRITE bit D5 cleared and POWER bit D6 set You then read the d
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