HP 44425A User manual

HP 44425A User manual
 OPERATING AND SERVICE MANUAL
MODEL 44425A
16 CHANNEL, ISOLATED, DIGITAL
INPUT/INTERRUPT ASSEMBLY
(OPTION 050)
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Only personnel with knowledge of electronic cir-
cuitry should install, re-configure, or make repairs to
— this instrument.
Manual Part Number 44425-90601
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Printed: May 1981 - _ |
à / PACKARD
>) ER | SAFETY SUMMARY
= | ‘The following general safety precautions must he observed during all phases of operation, service, and repair of this -|--
instrument. Failure to comply with thess precautions or with specific warnings elsewhere in this manual viclates
safety standards of design, manufacturs, and intended use of the instrument. Hewlett-Packard Company assumes no
liability for the customer's failure to comply with thess requirements. This is a Safety Class 1 instrument. 7
GROUND THE INSTRUMENT oe
To minimize shock hazard, the instrument chassis and cabinet must be connected to an elec-
trical ground. The instrument is equipped with a three-conductor ac power cable. The power
cable must either be plugged into an approved three-contact electrical outlet or used with a
three-contact to two-contact adapter with the grounding wire (green) firmly connected to an
electrical ground (safety ground) at the power outlet. The power jack and mating plug of the
TF 7 power cable meet International Electrotechnical Commission (IEC) safety standards.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes. Operation of any
electrical instrument in such an environment constitutes a definite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
L
Operating personnel must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified maintenance personnel. Do not replace components
with power cable connected. Under certain conditions, dangerous voltages may exist even with
the power cable removed. To avoid injuries, always disconnect power and discharge circuits
before touching them.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment u unless another person, capable of rendering first
aid and resuscitation, is present. по
DO NOT-SUBSTITUTE PARTS OR MODIFY INSTRUMENT --
Because of the danger of introducing additional hazards, do not install substitute parts or per-
form any unauthorized modification to the instrument. Return the instrument to a Hewlett-
Packard Sales and Service Office for « service > and repair to ensure that safety features are main-
Warnings, ‘such. as. the: example below. precede potentially dangerous procedures throughout
this manual. Instructions contained in the warnings must be followed. -
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A | | SAFETY SYMBOLS )
A
General Definitions of Safety Symbols Used On Equipment or In Manuals,
| Instruction manual symbol: the product will be marked with this _
symboi when it is necessary for the user to refer to the instruction
¢ | - Manual in order to protect against damage to the instrument.
" Indicates dangerous voltage (terminals fed from the interior by
a: voltage exceeding 1000 volts must be so marked). | |
CL О Protective conductor terminal. For protection against electrical --
e 4 e ов (+) shock in case of a fault. Used with field wiring terminals to in- ~~
E UT dicate the terminal which must be connected to > ground before
TT operating equipment.
Low-noise or noiseless, clean ground (earth) terminal: Used for a
on signal common, as well as providing protection against electrical
€ 3 o A - shock in case of a fault. A terminal marked with this symbol must
8 a. be connected to ground in the manner described in the installation
(operating) manual, and before operating the equipment.
‘ Frame or chassi3 terminal. A connection to the frame (chassis) of |
; 7 OR | “the equipment which normally includes all exposed metal struc- но
tures. “
CN > Alternating current (power line). — MA EET OM
——— Direct current (power line).
€ ANS Alternating or direct current (power line).
| The DANGER sign denotes'a hazard. It calls attention to an
DANGER operating procedure, practice, condition or the like, which could
Ш | жа result in injury or death-to personnel even during normal opera- -
| tion.
¢ , The WARNING sign denotes a hazard. It calls attention to a pro- = +”
- §- cedure, practice, condition or the like, which, if not correctly per:
formed or adhered to, could result in injury or death to personnel. +
E Thé CAUTION sign denotes a hazard,..It..calls. attention to amina <= = =
‘ Po | с AUTION 3 operating procedure, practice, condition or the like, ‘which, if not EE
AÑ WE BE aaa asd TCONTECtiy performed or adhered to, could: result in damage L to, or: Er ©
; | «++ destruction of part or ail of the products: A Y
; re eee me |
N O T Е: The NOTE sign deriotes: important informatign. It calls attention 2
| to procedure, practice; ‚condition or the like, ‚which is essential to <>
€ : | a en te Eta MENE eZ AZ CE minas To sita „ним Tes E “regie ne
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SECTION | В .
GENERAL INFORMATION
1-1. INTRODUCTION,
1-2. This manual contains operating and service in-
structions for the Model 44425A 16 channel, Isolated,
Digital Input/Interrupt Assembly (hereafter to be refer-
red to as the Digital Input Assembly). o
1-3. Applicabifity.
14. The MOdel 44425A is intended for use with the -hp-
3497A Data Acquisition/Control Unit and/or the
3498A Extender.
1-5. DESCRIPTION.
1-6. Card Structure.
1-7. The Digital Input card consists of sixteen optically
isolated input channels. Eight of the input channels may
- be sensed for interrupt purposes. In addition to this, op-
tically isolated handshaking is available to synchronize
data transfer between a peripheral and the 3497A (see
Figure 1-1).
1-8. Terminal Card.
1-9. The digital input terminal card has two wire con-
nections for each of sixteen input channels, gate and
flag (handshaking). Logic levels are determined by plac-
ing jumpers in designated positions that allow portions
of resistive networks to attenuate the signal for the op-
tical isolators a -
1-10. Channel Allocations.
I-11. Access to a specific channel requires that the
channel number is known in addition to the slot in
which the digital input board is located. The five slots in
the mainframe are numbered-from-0-t0-4. Each-3498A=-=---- ---—-—-
Extender has ten slots which may be designated for any
of the decades from 10 through 80 (see Section III,
Operation for the commands used with the digital input
card).
NOTE
Slots 5 through 9 do not exist for digital in- 5
put cards. Digital interrupt is not £ available ir in.
the 34984 Extender. De te Eos
1-12. Channel “Numbers. The. sixteen. channel s
S497A BACK PLANE
1} F7 INTERRUPT |
SETECT
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A
INT AMET
DIGITAL INPUT
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PAIX WORD
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SANS VERRE
pr
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INTERRUPT
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ISSLATOAS ISALATGRS
SIGNAL ЗВОНА,
CONDITIONING EONGITIONING
FET AA
Figura 1-1. Digital Input Block Diagram.
1-13. SAFETY,
1-14, The mainframe may contain voltages as high as
357V Peak within the cabinet enclosure. Only service
trained personnel are permitted access to devices within
the covers of the instrument.
Moab an AA A AA A pa. A LA Ad A dd A qUe
_ WARNING i
Never remove or r replace the Digital Input
Assembly with power applied to the instru-
ment or with power sources connected to the
terminal cards. | |
1-15. MANUAL CHANGES.
1-16. Manual changes necessitated by circuit board _
— revision or errata in documentation are given ‘in a
Manual Changes Supplement. To keep this manual as _›_
=.) eurrent as possible, Hewlett-Packard recommends that - ‘у
YOU periodically request the latest Manual Changes Sup- e
+>: plement. The supplement is identified with the manual Re
+ numbered from 0 ) through 2 Des TETAS en fa A
Print date ‘and © part | number. - ETS x de De
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Model 44425A
1-17. WARRANTY.
1-18. The warranty information provided with this
manual covers the Digital Input Assembly option and
does not extend to any other options used with the
3497A or the 3498A.
1-19. ORDERING ADDITIONAL MANUALS.
1-20. A manual is shipped with each Model 44423A
order. Additional manuals may be purchased from your
local Hewlett-Packard Sales and Service Office. Specify
the card model number and the "Вр- Part Number as
shown on the title page.
1-21. SPECIFICATIONS.
1-22. Specifications for the Digital Input Assembly are
given in Table 1-1.
Table 1-1. Specifications.
| - Digital Input-Mede (Bits 0-15}
Logic Polarity: =
Positive True (Negative True is jumper selectable)
Handshaking:
Gate and flag lines are © optically isolated: Gate output is
open collector. Flag input is identical to input lines.
Polarity of gate/fiag is jumper selectable. The assembly
may be configured to operate without handshaking.
Interrupt Mode (Bits 0.7) Ш
Minimum Pulse Width:
100 microseconds
Triggering: - o .
Each interrupt line is individually programmable for
Multiple Interrupts:
Multiple interrupts are latched and are dealt with at a
controller dependent rate,
Interrupt Timing:
The Option G50 assembly will respond to an interrupt
within 1 millisecond of a programmed interrupt condi
tion change.
Five Voit Supply: A os 4
Source up to 20 mA per assembly.
Operating Consideration: Ш
Digital Interrupt (68а). is not available in the 3498A
Extender,
Input Signal Characteristics:
= sion o я hos
cab ds i
positive or negative edge triggering. . —
input Max. Input Min. Input
Masking: Laval | Y, (max) Y imin) Voltage Current
Each interrupt line may be enabled or disabled using a - “ |
programmable mask. у " 5 r BY 0.8v 2.4V 30V 4090 кА
: BE o 12V. 3.0V - 7.0V 1 42v 11 mA
24V 5.0V 13.0V > 42V 2 mA
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SECTION II | . _
INSTALLATION
"ar
2-1. INTRODUCTION. separately from the terminal board. Five slots are
| available for circuit board installation in the 3497A and
2-2. This section provides installation instructions for ten slots are available in the 3498A.
the Digital Input Assembiy. Also included is informa-
tion concerning initial inspection, damage claims, 2-11. Hookup and installation of terminal cards is
packaging, storage, and shipment. given in Operation, Section III of this manual.
2-3. INITIAL INSPECTION. | 2-12. STORAGE AND SHIPMENT.
2-4. The digital input board and terminal board were 2-13. Environment.
carefully inspected both mechanically and electrically
- before shipment. The assembly should be free from 2-14. The Digital Input Assembly may be stored or
physical damage and be in perfect electrical order upon - shipped within the following limits:
receipt. To confirm this, inspect the circuit boards and о .
covers for physical damage. If any damage was incurred Temperature........... —40°С to +75°C
in transit, file a claim with the carrier. Test the electrical Humidity............... -Up to 95% R.H.
performance of the assembly as directed by the Perfor-
mance Test (Section IV of this manual). If there is
damage or deficiency, see the warranty in the front of
the manual.
2-5. OPERATING ENVIRONMENT.
The assembly should be protected from temperature ex-
tremes which may lead to condensation on the circuit
board or circuit board components.
2-15, Packaging.
2-6. The digital circuit board contains componerits that 2-16. Original Packaging. Containers and materials
may be damaged due to static discharge. Be aware that identical to those used in factory packaging are
there is no interrupt capability for a digital assembly available through Hewlett-Packard offices. If the
when installed in a 3498A Extender. — assembly is being returned to Hewlett-Packard for ser-
vicing, attach a tag indicating the type of service re-
- quired, return address, model number, revision letter,
CAUTION ¢ and board serial number. —
Verify that all power is removed from the 2-17. Other Packaging. The following instructions
34ITA/3498A before installing the assembly should be used for repacking with commercially
in a slot. Use clean handling techniques available materials:
when removing, replacing, or re-configuring
the circuit board. Handle the circuit board a. Wrap the assembly in a material which will not
by the edges and do not subject the com- subject the circuit board components to static discharge.
ponents to static discharges or excessive
voltages. b. Use a strong shipping container. A shipping con-
tainer should be so constructed that the circuit board
2-7. Operating Temperature. and circuit board components will not sustain damage
in transit.
2-8. The operating temperature is from 0°C to 55°C.
C. Seal the shipping container securely.
| WARNING | d. Mark the container as indicated in Original
Co a Packaging.
Installation and hookup should be ac- |
complished by service trained personnel who 0 - TE W ARNING 3
are aware of the hazards involved. Лт EE ee
+, 2. g. INSTALLATION. E E is o Вы | = - i Th ah . с The Model 4442 5 Ai is not intended or out; Do ce o
“door use. Do not expose it to rain or “other
“Digi Input E ; E:
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SECTION III
OPERATION
3-1. INTRODUCTION.
3-2. The Operating Section contains those instructions
and procedures which correspond to the operation of
the Digital Input Assembly. Also included are hookup,
reconfiguration procedures, and information concern-
ing the terminal card,
3-3. OPERATING COMMANDS.
34. The instructions which correspond to Digital Input
Assembly are given in Table 3-1. Note that these instruc-
tions are also listed in the Command Quick Reference
under the Digital grouping (see Interfacing, Commands,
and Syntax Structure in the main Operating and Service
Manual).
Table 3-1. Digital Commands.
Mnemonic Function Dafinition
DRn* Digital Read (slot) Ín=0 to 89
Din* — [Digital Interrupt Status In=8 to 4 --
{siot)
DSni,n2 | Digital Interrupt Sense [n1=0to4 n2=0to 377
{slot, octal} bit position = positive
transition
DEnT,n2 [Digital Interrupt Enable [n1=08t0 4 n2=64 to 377
{siot, octal} bit position = input bit
enabled.
DVn {Digital View (slot) — |n=0to89"
Din* Digital Load (siot) |n=0t089
St {see Mainframe Func-
tional Area)
“Changes 3497A output to this function.
3-5. Digital Read.
3-6. To read the output of a digital card on a con-
tinuous basis, send “DRn”’ over the remote interface.
The parameter “‘n” is à slot number from 6 to 89. Data
will be loaded into the output buffer ready for transfer
to the controller. To transfer the data, perform a read
operation. Data transferred will be the octal equivalent
of the high true input to the card. The octal numbers,
comprised of six digits, are “ASCII characters. The max-
imum read rate ‘of a digital card i is typically 4 400HZ. -
37. Digital Intorrapt Status. -
+... 3-38. The interrupt status of cach of f the five mainframe E
Si a 15. Digital 1. Load, i = ин EE
siots-may be checked by sending the “Din?” command
over the remote interface. The parameter “n”' is a slot
number from 9 to 4. The interrupt data for that slot will
be loaded into the output buffer. Reading from the
3497 A results in the transmission, to the controller, of
three octal digits (000 to 377) that indicate the value of
the interrupt bits. If bit 3 received an interrupt, the
value returned after the 3497A is read by the controller
would be 10g (00 001 000).
3-9. Digital Interrupt Senss.
3-10. The interrupt sense is the direction of signal tran-
sition in a bit position (channel). When ‘“DSn1,n2” is
sent over the remote interface, “nl” denotes the siot (9
to 4) and “n2” denotes the channel for which positive
transitions will be sensed. The parameter ““n2’’ is an oc-
tal number (sent as ASCII characters) in the range from
0 to 377, For example, to sense the positive transitions
on channel CH6 in slot 2, send “DS2,188”. Note that
-n2 is derived in octal (01 000 000). A direct correlation
to this is that all channels not designated for positive
transitions will be sensed for negative transitions. In this
case, sending ‘’DS2, в” will enable negative sense on all
eight bits.
3-11. Digital Interrupt Enable,
. 3-12. Any combination of the eight interrupt channels
. may be selected to set the SRQ bit in the 3497A main-
frame. This is accomplished by sending the “DEnl,n2”
command over the remote interface. The parameter
“nl” is the slot number; parameter “n2” is an octal
number (8 to 377) that indicates the interrupt channels.
For example, to enable channels 9, 1, and 2 in slot 3,
send ‘’DE3,7’’. The number for *‘n2”’ is derived by
figuring the bit positions in octal (00 000 111) 111 =
If *“n2” equals @, all channels are disabled.
Mio
3-13. Digital View. | Le L
3-14. Digital view allows the e display (front panel option
required) to be dedicated to a slot: To use digital view,
_ send “DVn” over the remote interface. The parameter
“1” (8 to 89) is the slot number. Digital view may also
“bei initiated on the front panel when the instrument is in
N remote. The command “DV”. without a parameter,
"tr.
““’mand does not effect the sequence of operations à in the ne. |
3497A.
a К, = fy
ная
20 16. - Digital load provides the same information + as $
Digi ot Tapas aE
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STORE
Model 44425A | 8
digital read (DR) with the exception that only one
. reading is produced each time the command is executed. | |
To execute digital load, send “DLn” over the remote in- v y vv = \
, terface, The parameter “n”” (0 to 89) is the slot number. TT oT tr | г
| Ga 9
3-17. USING THE DIGITAL INPUT TERMINAL CARD. ol 7 uy |
e i a N “BATE” PROTECTION
3-18. Each digital channel requires two connections to nt an NI OT
. . . . a . 66 RES 7
complete the circuit to the optical isolator input. This ан 18181 2, | 80
allows each channel to be isolated from the other input nez | El ass
channels unless common connections are made (see a 68 PROTECTION РОВ
Digital Input Board Modifications). Jumpers enable the 12 128 CTT REVERSED CONNECTIONS
selection of +5V (factory set), +12V, and + 24V logic md A! |
levels (see Figure 3-1). The logic level network has pro- &— | <
tection in case of reversed connections (see Figure 3-2). sy ls E
Note that the “FLAG” input is similar to a channel in- « Cm
put. The “GATE” output is an open collector device Lays Laza |
Ÿ 2.24 1 2.2K $
{user must supply pull-up source voltage). Note that the
“GATE” output is zener limited to 30V to protect the | |
device from operating at excessive power levels. el el [2]
a/ @ e |
“CONNECT " " “ ©
HIGH INPUTS 4 32V Hi asezza- Ta
. JUMPER
CONNECT LG
LOW INPUTS +54 [204 | sme |
ur. ’ E Figure 3-2. Digital Input Protection. +
| «1 mom ft —— —R37— Е о
—R — Re | Ti —REBw pp. ; ;
{H9 me RG — —R3%~ cap. —
on [| | | Ва по RS O 3-21. GPERATING CONSIDERATIONS.
ol | a mea > 3.22. Pulse Width For Interrupt. |
cua = — Re heen -LRS- — - * Lisa { or ih errunp
cs 34 [5 —Rt2— ae Che 73 . :
E Zas [a Casse car I 3-23. To establish an interrupt on one or more of the
we [7] [1 | Zac рта —aso— cas. — eight designated channels, the pulse width of the input
ha | AT T3 RT cre — signal must be greater than 100 microseconds. |
— Lama! —R13— —R53-— im
си | [| п В 60 С NOTE
cas [1 [1 De Led TA em
as FF CRESS as IT In many cases it is desirable to use isolation
mac [7] [Г] | ее [8 сео cris on the digital inputs. This will reduce the
CA a E — _ a _ air
ore — "| = Asa case CU possibility that spurious signals ) will trigger
cle — | —R30— PES —R64- CRIS — an interrup
= A Canal (3 “nee ERIS wm]
EAE m ES —RGFw CRIT et :
= * - —RI6— 4 mE Е .
VE ОГ Ш 3-24. Handshaking. -
SYSTEM GROUND O. OTT ВЕ |
{Chassis and Earth Ground) -. ASS 7 uE. ETS a. = - — :
—-3-25.-When shipped from the factory, handshaking on
=— TT — the digital input-board is-disabled: Fhis-requires that-the-
Figura 3. 1. Terminal Board Connections. controller be programmed to read any fluctuating input
Æ data at the appropriate time to assure that the data is
3 19. Wire Routing In The Terminal Card Holder.” В “valid. Handshaking is used to verify that the 3497A
| , Г responds, to each data transmission, thereby synchroniz-
. “3-20. To. connect “the inputs to the terminals, r remove ‘ing the ‘data source with the digital input. To enable.
- four screws that retain the terminal. card.cover. Route , handshaking, set t the | jumper on the digital input board
“the wires through the labyrinth j in the card holder and O HS”. TE ; о
out the port at the bottom; this provides strain relief for 8 = FETE EN LTE ER BRL TO LE
а the terminals. (see. Figure, 33): When finished, » féplace - ; 3260 Handshake co Signals, The 3497A Begins à the hand. Le
‘the card | cover. a Do LANE 0 ‘shake. sequence by signaling 2 a 5 READY, condition 0 on.
os his y po Te ini hr A E o De. ; FREE 5 О од 3 BEY e hve Sham Tonal
"Ea
J, Digital Input | e Do E = ‘ - o
DS == F ro AT 7 MED ST TAE PA 7 > ETE Тек TTT т Tn a ERE EA EA EM TE TT A ET a aa Ea EI CTE PO NIE DT NE te т т 7 7 A TAE
mo! Fi SETI NETA ANETTE TASAS RENO UNNE
Model 44425A
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d4425A-3-1
Figure 3-3. Wira Routing In The Terminal Card Holder, - a
the “GATE” output line. This may be the result of a
digital read “DRn” ora digital load “DLn”” command.
the data source may then place data on the input lines
and signal that the data is valid and stable by toggling
the “FLAG” line, The 3497A immediately responds by
setting the “GATE” line to “BUSY”. The “BUSY”
mode will continue until the data is removed from the
digital input card buffers and transferred to the con-
troller (example signals are given in Figure 3-4).
16
20
36
49
50
3-30.
3-31,
-put card be preset to respond to the appropriate chan-
CLEAR 709
OUTPUT 789; “DR4”
ENTER 749; A
PRINTA ..
END
Using Digital Interrupt.
Using digital interrupt requires that the digital in-
nels and the mainframe SRQ register be masked to
— EL Tre ATENEO enable SRQ for digital interrupt. The following pro-
- GATE - — a | READY ЕЕ gram sets SRQ for a positive transition on channels $
! and 2 in slot 3. | o a
DATA
DATA VE
19 CLEAR 769
-y (DATA VALID 26 ON INT 47,15 GOSUB Interrupt |
FLAG De ; “38 CONTROL MASK 7; 128 7 TUU 000
fesses 43 ENABLE a o
38 OUTPUT 789; “DS3,44DE3,44”'.— Set sense; set enable
M4A2SA-3-4 68 OUTPUT 709;“SE2” Set SRQ register for
digital interrupt.
Figure 3-4. Factory Set Handshakes Signals. 78 1 Main Program Starts Here
8 Y 8 85 GOTO 79 |
99 END +
3-27. EXAMPLE PROGRAMS. 100 Interrupt: STATUS 709:5
110 IF S#2 THEN 159
° 3-28. Reading Digital Data. — 128 OUTPUT 709;“D13”
| | | —. 138 ENTER 709: T | =
. . —. 148 PRINT “INTERRUPT DATA"”,T
3-29. The following program reads the digital data in. - 159 RETURN =) RC
slot 4 and prints the results. =... — CUT ee eT бд
+ e de a. 27 Digital’ Input 52e
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Model 44425A
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3-32. Digital Input Modifications.
3-33. The digital input board is shipped from the fac-
tory in a -defined configuration as noted below.
However, further modifications may be made to the cir-
cuit ‘board to enhance its utility. Figure 3-5 describes
portions of the circuit board which are subject to recon-
figuration.
3-34. Modifications for Contact Closure To
Ground. One way to configure the digital input board
for contact closure to ground requires that the two
system grounds be connected together. In addition to
this, a pull up (2 Kohms) is added to the OC PULL UP
; . os block for each channel used. A diagram describing the
‘Function Location Description . . .
: hookup for one channel is given in Figure 3-6.
UOLFG-UT ‘a Flag sense on high to low transition ; -
HFG a Flag sense on low to high transition '
Le e (Factory setting) |
INVT b Inverts input data logic to low true
{applies to DRn and DLn commands) не не не = =
CONNECTOR
HS. с Enables handshake CARD
cw Ce a - . … ‚ | gr PULL-UP [ . i
GPU d Gate Pullup. Install 2Kohm resistor y BROOK. TERMINALE
if data source does not have pull
up.”
LIGHT | - |
| .. "om + ¥ prooe : - | peers
IK НОТ d High Gate. BUSY high ISOLATOR | an 4
У READY = low Е .
> | a 7 S | ;
FPU - d Flag Pullup. Install 2Kohm resistor if Ce he Lo В
data source does not have pull up.”
LGT d Low Gate, “BUSY” = low . - o o END |
“READY” = high (factory setting) ОЕ a | NN о
dos > >—O
1 В a.
OC Pull Up e Open Collector Pull Ups. install ‘ 4 E. | $
| 2Kohm resistors if data source has | mme ir
| open collector outputs, * | |
*System grouads must be connected between data a | = o | 4442 БА 3-6
source and 3497A. -
| a „= az “ - ` * пая
Figure 3-5. Digital Input Board Modifications. Figure 3-5. Configuration For Contact Closure To Ground.
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