IOtech Digital HS User manual

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Digital HS
User’s Manual
IOtech, Inc.
25971 Cannon Road
Cleveland, OH 44146
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: http://www.iotech.com
Digital HS
User’s Manual
p/n Digital HS - 901
© 1998 by IOtech, Inc. — Printed in the United States of America
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Warranty
Your IOtech warranty is as stated on the product warranty card. You may contact IOtech by
phone, fax machine, or e-mail in regard to warranty-related issues.
Phone: [phone], fax: [phone], email: [email protected]
Limitation of Liability
IOtech, Inc. cannot be held liable for any damages resulting from the use or misuse of this
product.
Copyright, Trademark, and Licensing Notice
All IOtech documentation, software, and hardware are copyright with all rights reserved. No
part of this product may be copied, reproduced or transmitted by any mechanical,
photographic, electronic, or other method without IOtech’s prior written consent. IOtech
product names are trademarked; other product names, as applicable, are trademarks of their
respective holders. All supplied IOtech software (including miscellaneous support files,
drivers, and sample programs) may only be used on one installation. You may make archival
backup copies.
FCC Statement
IOtech devices emit radio frequency energy in levels compliant with Federal Communications
Commission rules (Part 15) for Class A devices. If necessary, refer to the FCC booklet How To Identify
and Resolve Radio-TV Interference Problems (stock # 004-000-00345-4) which is available from the
U.S. Government Printing Office, Washington, D.C. 20402.
CE Notice
Many IOtech products carry the CE marker indicating they comply with the safety and emissions
standards of the European Community. As applicable, we ship these products with a Declaration of
Conformity stating which specifications and operating conditions apply.
Warnings and Cautions
Refer all service to qualified personnel. This caution symbol warns of possible personal injury or
equipment damage under noted conditions. Follow all safety standards of professional practice and the
recommendations in this manual. Using this equipment in ways other than described in this manual can
present serious safety hazards or cause equipment damage.
This warning symbol is used in this manual or on the equipment to warn of possible injury or death from
electrical shock under noted conditions.
This ESD caution symbol urges proper handling of equipment or components sensitive to damage from
electrostatic discharge. Proper handling guidelines include the use of grounded anti-static mats and wrist
straps, ESD-protective bags and cartons, and related procedures.
Specifications and Calibration
Specifications are subject to change without notice. Significant changes will be
addressed in an addendum or revision to the manual. As applicable, IOtech calibrates its
hardware products to published specifications. Periodic hardware calibration is not covered
under the warranty and must be performed by qualified personnel as specified in this manual.
Improper calibration procedures may void the warranty.
Quality Notice
IOtech has maintained ISO 9001 certification since 1996. Prior to shipment, we thoroughly test our
products and review our documentation to assure the highest quality in all aspects. In a spirit of
continuous improvement, IOtech welcomes your suggestions.
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Introduction
1.1 General Description
The Digital488HS/32 is a high speed IEEE 488 to digital I/O interface providing the
fastest possible communication between the IEEE 488 bus and 34 TTL compatible
digital I/O lines (17 inputs and 17 outputs). Both the input lines and the output lines
have an associated pair of handshake lines. The Data Available (iDAV and oDAV for
input and output respectively) line is driven by the data source to indicate that the
receiver should accept new data. The Busy (iBusy and oBusy for input and output
respectively) line is driven by the receiver to indicate that the source should not send
new data. Each handshake line is switch selectable for either active high or active low
operation.
The input and output ports are separated into one 8-bit (first byte) port and one 9-bit
(second byte) port. There are two separate switch selectable operating modes for both
the input and output data ports, 8-bit and 16-bit. In the 8-bit mode, 8-bit data are
transferred to or from the second byte port with the IEEE 488 bus control line EOI as
the 9th bit. In the 16-bit mode, the first eight bits of data are transferred to or from the
first byte port followed by the next eight bits with EOI to or from the second byte
port. The user connects the external I/O device to correspond to the desired byte
ordering (most significant byte first or least significant byte first). Both input and
output ports are separately switch selectable for either active high or active low
output data operation.
The output port provides switch selection for each bit of high or low on power-on,
reset, or clear.
There are two switch enabled conditions for which the Digital488HS/32 can request
service with SRQs: Output Port Empty and Input Port Full. This status can also
determined by Parallel Poll via switch selectable responses.
Some of the control lines available are:
oClear This output line provides an active 1µSec pulse upon
detection of the IEEE 488 multiline commands DCL and
SDC. This control line is switch selectable for either active
high or active low operation.
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oTrigger This output line provides an active 1µSec pulse upon
detection of the IEEE 488 multiline command GET. This
control line is switch selectable for either active high or
active low operation.
/oReset This output line provides an active low signal for
approximately 100msec at power on and for the duration
of the time /iReset is active plus approximately 100msec.
/iReset This input line provides an external method to power-on
cycle the Digital488HS/32. When this line is low, the
/oReset line also becomes active low.
SB1 Serial Poll Bit #1. An external input to the
Digital488HS/32 serial poll register which can be read via
IEEE 488 serial polls. This condition may also be switch
selected to generate an SRQ on the IEEE 488 bus.
SB2 Serial Poll Bit #2. An external input to the
Digital488HS/32 serial poll register which can be read via
IEEE 488 serial polls. This condition may also be switch
selected to generate an SRQ on the IEEE 488 bus.
/OE The output buffers on the digital output port are placed in
tri-state when this line is in an inactive (high) state. This
allows use of the Digital488HS/32 as a bidirectional
interface, connecting the input and output port data lines
together.
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1.2 Available Accessories
Additional accessories that can be ordered for the Digital488HS/32 include:
CA-7-1 1.5 foot IEEE 488 cable
CA-7-3 6 foot shielded IEEE 488 cable
CA-7-4 6 foot reverse entry IEEE 488 cable
CN-20 Right angle IEEE 488 adapter, male and female
CN-22 IEEE 488 multi-tap bus strip, four female connectors
in parallel
CN-23 IEEE 488 panel mount feed-through connector, male
and female
DigitalHS-901 Additional Instruction Manual
1.3 Specifications*
Digital I/O Capability: 16-bit TTL compatible inputs, 16-bit TTL compatible outputs. Also
included are two output and two input data handshake lines, two status bit lines, clear output, trigger
output, reset input, input END of data and output END of data lines.
Logic Levels:
Output : VOH = 2 volts min @ IOH = -15 mA ; 3.4 volts typ @ IOH = -3 mA
VOL = 0.5 volts max @ IOL = 24 mA ; 0.4 volts MAX @ IOL = 12 mA
Input: VIH = 2 volts min
VIL = 0.8 volts max
IIH = 0.02 mA max @ VIN = 2.7 volts (Data Input Lines)
IIL = -0.20 mA max @ VIN = 0.4 volts (Data Input Lines)
IIL = -0.50 mA max @ VIN = 0.4 volts (Control & Handshake Input Lines)
IIH = -0.30 mA max @ VIN = 2.7 volts (Control & Handshake Input Lines)
Logic Sense: Switch selectable power on and Device Clear (DCL & SDC) levels on output
data lines. Switch selectable logic inversion for input data port, output data port,
input handshake lines, output handshake lines, END lines, trigger and clear lines.
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IEEE 488.1 Specification Subsets:
SH1, AH1, T6, TE0, L3, LE0, SR1, PP2, RL0, DC1, DT1, C0, E2
DIO Drivers: Tri-State drivers are used on all DIO lines except during PPAS
(Parallel Poll Active State) when open collector drivers are used.
Connector: Standard IEEE 488.1 connector with metric studs.
Data Transfer Speed: 1,000,000 bytes/sec (handshake lines connected externally
together)
SRQ: Switch selectable SRQs on Input Port Full, Output Port Empty, External
Service Bit #1 and External Service Bit #2.
Parallel Poll: Switch selectable response on Input Port Full and Output Port Empty.
General
Indicators: LEDs for Talk, Listen, SRQ, Input Port Full, Output Port Empty and Power.
Power: 105-125V or 210-250v, 50/60 Hz; 60 VA max
Environment: 0 to 50°C; 0 to 70% RH to 35°C. Linearly derate RH 3%/°C from 35° to 50°C
Dimensions: 425mm wide x 45 mm high x 203 mm deep (16.75" x 1.75" x 8")
Weight: 4.5 kg (10 lbs)
Controls: Power switch, external switch for IEEE 488 bus address, internal switches for
output data power on levels, SRQ and ist enable, output data logic sense, input
data
logic sense and logic sense for Trigger, Clear, handshake and END lines.
Supplied Accessories: Two (2) mating solder-tab I/O connectors, power cord, manual and
rack mount kit.
*
*Specifications Subjectto Change Without Notice
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1.4 Abbreviations
The following IEEE 488 abbreviations may be used throughout this manual.
addr n IEEE bus address "n"
ATN Attention line
CA Controller Active
CR Carriage Return
data Data String
DCL Device Clear
GET Group Execute Trigger
GTL Go To Local
LA Listener Active
LAG Listen Address Group
LF Line Feed
LLO Local Lock Out
MLA My Listen Address
MTA My Talk Address
PPC Parallel Poll Configure
PPU Parallel Poll Unconfigure
SC System Controller
SDC Selected Device Clear
SPD Serial Poll Disable
SPE Serial Poll Enable
SRQ Service Request
TA Talker Active
TAD Talker Address
TCT Take Control
term Terminator
UNL Unlisten
UNT Untalk
* Unasserted
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Getting Started
2.1 Inspection
The Digital488HS/32 was carefully inspected, both mechanically and electrically,
prior to shipment. After receiving the Digital488HS/32, carefully unpack all items
from the shipping carton and check for any obvious signs of physical damage. Report
any such damage found to the shipping agent immediately. Retain all shipping
materials in the event that shipment back to the factory is necessary.
Every Digital488HS/32 is shipped with the following items:
• Digital488HS/32 High Speed Digital I/O Interface
• DigitalHS-901 Instruction Manual
• 167-0800 Accessory Kit, which includes:
CA-1 Power Cable
FU-1-.25 1/4 Amp Replacement Fuse
FE-1 Rubber Feet (4)
EN-6 Rack Ears (2)
HA-41-6 Rack Ear Screws (4)
CN-19-37 37 Pin Male Connectors (2)
CN-17-37 Hood for CN-19-37 (2)
2.2 Configuration
The Digital488HS/32 has one external eight position switch, accessible from the rear
panel, and four internal eight position configuration switches (S2, S3, S4 and S5).
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2.2.1 Factory Defaults
The Digital488HS/32 is factory configured to the following switch settings.
1 3456782
88 168421
DIS IEEE ADDRESS
I
N
O
U
T
MODE
NDAC HOLDOFF ENABLE
1
0
16 16
S3
OPEN
S2
SRQ EN FULL
ist EN FULL
iDAV POL iBUSY POL iEND POL
iDATA POL SRQ EN SB1 SRQ EN SB2
SRQ EN EMPTY ist EN EMPTY
oDAV POL
oBUSY POL
oEND POL
oDATA POL
TRIGGER POL
CLR POL
87654321
OPEN
87654321
12345678
OPEN
S5
OUT
0 1 2 3 4 5 6 7
HI LO
PTO DEFAULT
12345678
OPEN
S4
OUT
8 9
10 11 12 13 14 15
HI LO
PTO DEFAULT
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2.2.2 Internal Switch Settings
The internal settings on the Digital488HS/32 are for the line voltage, input and output
settings and the PTO default settings.
WARNING
Disconnect the power cord from the ac line and
from the Digital488HS/32 prior to disassembly.
Disconnect any cables prior to disassembly.
WARNING
Never open the Digital488HS/32 case while it is
connected to the ac line. Failure to observe this
warning may result in equipment failure,
personal injury or death.
Place the interface on a flat surface. Remove the four (4) screws located at each
corner. Carefully remove the top cover. Modify the parameters appropriate for your
installation and carefully re-assemble the interface using the reverse of the procedure
described.
2.2.2.1 Line Voltage Selection
The Digital488HS/32 may be operated from 110 or 220 V ac. The unit was shipped
from the factory set for the operating voltage marked on the label placed over the
power jack on the rear panel. To change the operating voltage, change the setting ot
internal switch S7 according to the following instructions.
WARNING
The Digital488HS/32 is intended for INDOOR
USE ONLY. Failure to observe this warning
could result in equipment failure, personal
injury or death.
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1. The line voltage selection switch (S7) is located below the main power suply
transformer (T2). Insert the tip of a small screwdriver into the slot of the switch
and move the switch so the desired line voltage appears on the switch.
2. Install a power line fuse appropriate for the line voltage. The fuse is located below
the internal line voltage switch (S7). Gently pull upward on the plastic fuse
housing. Remove the entire housing with the fuse inside. Select a fuse with the
proper rating (see table below).
Line Voltage Fuse Type
105-125V 1/2A 250V, Slo Blo, 3AG
210-250V 1/4A 250V, Slo Blo, 3AG
A fuse with a rating higher than that specified
may cause damage to the instrument. If the
instrument repeatedly blows fuses, contact the
factory.
3. Open the fuse housing by pushing up on the tab on the bottom of the housing.
4. Replace the fuse and close the housing. Insert the fuse housing into the fuse
holder.
5. Make note of the new voltage setting for later reference and carefully re-assemble
the unit.
2.2.2.2 Input Setup
Several features are available for the input port. These features are selected by
internal switch S2, labeled INPUT SETUP. The factory defaults for these feature
selections are shown on the next page.
The features include:
SRQ On Input Port Full (Serial Poll Feature)
SRQ On Status Bit 1 - SB1 (Serial Poll Feature)
SRQ On Status Bit 2 - SB2 (Serial Poll Feature)
ist Enable on Input Port Full (Parallel Poll Feature)
Polarity Selection for Input Data, iEND, iDAV and iBusy Lines
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The digital input port contains 16 bits of TTL level inputs, one END line (iEND)
input, two handshake lines (iDAV and iBusy), one control line (\iRESET), two status
lines (SB1 and SB2), and logic supply lines (+5V and ground).
OPEN
S2
SRQ EN FULL
ist EN FULL
iDAV POL iBUSY POL iEND POL
iDATA POL SRQ EN SB1 SRQ EN SB2
87654321
Input Port Feature Selection Switch
Default Settings
2.2.2.2.1 S2-1 SRQ EN Full: Service Request Enable
Service Request (SRQ) Enable causes the Digital488HS/32 to generate a service
request on the IEEE 488 bus when iDAV transitions from the inactive (not Full) to
the active state (Full), indicating the external device has transferred data and the port
is Full. Default is SRQ on Full disabled.
OPEN
S2
SRQ EN FULL
8
7654321
OPEN
87654321
S2
SRQ EN FULL
SRQ on Full Disabled
(default) SRQ on Full Enabled
SRQ On Input Port Full Selection
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2.2.2.2.2 S2-2 ist EN Full: Individual Status Message True on Input Port Full
Enable
The Full status of the input port can be sensed via parallel polls when the ist
(individual status message) Enable is selected. See section 3.4 for more information.
Default is disabled.
OPEN
S2
ist EN FULL
87654321
OPEN
87654321
iston Input Full Disabled
(default) iston Input Full Enabled
S2
ist EN FULL
Individual Status Message (ist) on Full Status
2.2.2.2.3 S2-3 iDAV POL: Input Data Available Handshake Line
The Input Data available handshake line is an input line sourced by the external
device. It can be configured for rising edge or falling edge operation. Factory default
is falling edge operation.
OPEN
S2
iDAV POL
87654321
Falling Edge iDAV
(default)
OPEN
S2
iDAV POL
87654321
Rising Edge iDAV
Polarity Selection for the iDAV Handshake Line
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2.2.2.2.4 S2-4 iBUSY POL: Input Port Busy Handshake Line
The input port busy handshake line, iBusy, is an input line sourced by the
Digital488HS/32. It can be configured as active high or active low. Factory default is
active high.
S2
iBUSY POL
OPEN
87654321
Active Low iBusy
S2
iBUSY POL
OPEN
87654321
Active High iBusy
(default)
Polarity Selection for the iBusy Handshake Line
2.2.2.2.5 S2-5 iEND POL: Input End Control Line Polarity
The iEND control line is latched into the ninth bit of the second byte input port. This
latched iEND signal directly drives the IEEE 488 EOI line during the second byte
transfer and can be used to signal the end of the transfer to the IEEE 488 controller.
iEND can be set for active high or active low operation. Default is active high.
OPEN
S2
iEND POL
87654321
Active Low iEND
OPEN
S2
iEND POL
87654321
Active High iEND
(default)
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Polarity Selection for the iEND Control Line
2.2.2.2.6 S2-6 iDATA POL: Input Data Polarity
The input data bits can be active high or active low. For example, if a data byte of
&h07 is transferred from the input port with the iData Polarity selected for active low
operation, the data byte received by the IEEE 488 controller will be &hF8.
At power on, iRESET, Device Clear (DCL) or Selected Device Clear (SDC), the 16-
bit digital input latches are forced to a Not Full condition. Default setting is active
high.
OPEN
S2
iDATA POL
87654321
Active Low iDATA
OPEN
S2
iDATA POL
87654321
Active High iDATA
(default)
Polarity Selection for the Input Port Data Lines
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2.2.2.2.7 S2-7 and S2-8 SRQ EN SB1 and SRQ EN SB2: Service Request
on External Status Bit 1 and 2
The input port has two status line inputs that allow the external device to request
service to the IEEE 488 bus via the Digital488HS/32. Each of these status line inputs
is capable of generating an SRQ on the bus when this feature is enabled. When
enabled, a service request is generated on the rising edge of the SB signal lines. This
active polarity is not switch selectable. Each status bit can be polled by the IEEE 488
bus controller via serial polls. The level of the signal is latched at the beginning of the
serial poll process. Default is SRQ disabled.
OPEN
S2
SRQ EN SB1
87654321
OPEN
87654321
S2
SRQ on SB1 Disabled
(default) SRQ on SB1 Enabled
SRQ EN SB1
SRQ On External Status Bit 1 (SB1) Selection
OPEN
S2
SRQ EN SB2
87654321
OPEN
87654321
S2
SRQ on SB2 Disabled
(default) SRQ on SB2 Enabled
SRQ EN SB2
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SRQ On External Status Bit 2 (SB2) Selection
2.2.2.3 Digital Output Port Setup
Several features are available for the output port. These features are selected by
internal switch S3, labeled OUTPUT SETUP. The factory defaults for these feature
selections are shown in the following.
The features include:
SRQ On Output Port Empty (Serial Poll Feature)
ist Enable on Output Port Empty (Parallel Poll Feature)
Polarity Selection for Output Data, oEND, oTrigger, oClear,
oDAV and oBusy Lines
The digital output port contains 16 bits of TTL level outputs, one END line (oEND),
two handshake lines (oDAV and oBusy), four control lines (/oRESET, /OE, oClear
and oTrigger) and logic supply lines (+5V and ground).
S3
SRQ EN EMPTY ist EN EMPTY oDAV POL
oBUSY POL
oEND POL
oDATA POL
TRIGGER POL
CLR POL
OPEN
87654321
Output Port Feature Selection Switch
Default Settings
2.2.2.3.1 S3-1 SRQ EN EMPTY: Service Request Enable
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Service Request (SRQ) Enable causes the Digital488HS/32 to generate a service
request on the IEEE 488 bus when oBusy transitions from the active (Not Empty) to
the inactive (Empty) state, indicating the external device has accepted previous data
and the port is Empty. Default is SRQ on Empty disabled.
OPEN
87654321
OPEN
87654321
SRQ on Empty Disabled
(default) SRQ on Empty Enabled
S3
SRQ EN EMPTY
S3
SRQ EN EMPTY
SRQ On Output Port Empty Selection
2.2.2.3.2 S3-2 ist EN EMPTY: Individual Status Message True on Outut
Port Empty Enable
The Empty status can be sensed via parallel polls when the individual status message
(ist) enable is selected. See section 3.4 for more information. Default is disabled.
OPEN
87654321
OPEN
87654321
iston Empty Disabled
(default) iston Empty Enabled
S3
ist EN EMPTY
S3
ist EN EMPTY
Individual Status Message (ist) on Output Port Empty Selection
2.2.2.3.3 S3-3 oDAV POL: Output Data Available Handshake Line
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The Output Data available handshake line, oDAV, is an output line sourced by the
Digital488HS/32. It can be configured for active high or active low operation.
Factory default is active high (rising edge) operation.
OPEN
87654321
Falling Edge oDAV
S3
oDAV POL
OPEN
87654321
Rising Edge oDAV
(default)
S3
oDAV POL
Polarity Selection for the oDAV Handshake Line
2.2.2.3.4 S3-4 oBUSY POL: Output Port Busy Handshake Line
The output port busy handshake line, oBusy, is an input sensed by the
Digital488HS/32. It can be configured as active high or active low. Factory default is
active high.
OPEN
87654321
Active Low oBusy
OPEN
87654321
Active High oBusy
(default)
S3
oBUSY POL
S3
oBUSY POL
Polarity Selection for the oBusy Handshake Line
2.2.2.3.5 S3-5 oEND POL: Output End Control Line
The level of the oEND control line is individually switch selectable for active high or
active low operation. The oEND line is forced active, either high or low, by power-
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