Figure 1
Model STA-3108A1
ModelSTA-3108A1
PackingList
Introduction
This document contains information necessary to successfully install your hardware.
WARNING
The STA-3108A1 is not intended for use in circuits carrying voltages in excess of 30V RMS, 42.4V peak,
or 60VDC.
Descriptions
The screw terminals on the STA-3108A1 screw terminal connector let you connect field wiring to another board such as a
KPCI-3108 board using an IEEE-1284 C-C cable. The screw terminals are labeled from 1 to 36 and correspond directly to the
functions of the pins on the main I/O connector on the KPCI-3108 board. For example, if pin 24 is assigned to the analog
function OP0, use screw terminal 24 to attach a hardware output 0. Refer to the User’s Guide for the board to which you are
connecting the STA-3108A1 for detailed wiring information.
The STA-3108A1 has a 50-pin connector that maps the required signals to enable the use of the EXP1800 (Channel Expansion,
16 Channel Multiplexer Board) with the KPCI-3108.
The KPCI-3108 does not output mux control signals on [XOP0..XOP4] in all software modes. When using EXP-1800, the
KPCI-3108 outputs must be configured for mux control. For the STA-3108A1 functional specifications, please see the
STA-3108A1 user manual. For the EXP-1800 functional specifications, please see the EXP-1800 user manual.
The STA-3108A1 panel has rubber feet and mounting holes.
PA-666 Rev. A / 8-99
WARNING
When using the STA-3108A1, the maximum voltage allowed is 30V RMS, 42.4V peak, or 60VDC. Exceeding this limit could cause an insulation failure and shock hazard.
CAUTION
Although the STA-3108A1 is rated for 60 volts peak-to-peak, the board to which it is connected may be
rated for a much lower voltage. For example, the KPCI-3108 analog inputs can only tolerate 35 volts
peak without damage, and digital I/O will be damaged by voltages above +5V.
Specifications
Voltage: 30V RMS, 42.4V peak, or 60VDC
Current: 1 amp maximum
Environment: –30˚C to +85˚C
Safety precautions
Observe the following safety precautions before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions
may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid possible injury. Read the operating information carefully before using the product.
General definitions
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating, for example, setting the line voltage
or replacing consumable materials. Maintenance procedures are described in the manual. The procedures explicitly state if the
operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to work on live circuits, and perform safe installations and repairs of products. Only properly
trained service personnel may perform installation and service procedures.
!
The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.
The symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined effect of
normal and common mode voltages. Use standard safety precautions to avoid personal contact with these voltages.
The WARNING heading in a manual explains dangers that might result in personal injury or death. Always read the associated
information very carefully before performing the indicated procedure.
The CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may invalidate the
warranty.
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Installation
As described in the International Electrotechnical Commission (IEC) Standard IEC 664, the signal terminals are Installation
Category I and must not be connected to mains.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.
Operators and maintainers of this product must be protected from electric shock at all times. The responsible body must ensure
that users are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to
potential human contact. Product users in these circumstances must be trained to protect themselves from the risk of electric
shock. If the circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed.
Operation
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures.
The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS,
42.4V peak, or 60VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown
circuit before measuring.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or switching card.
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
Instrumentation and accessories shall not be connected to humans.
Maintenance and service
Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
Before performing any maintenance, disconnect the line cord and all test cables.
Cleaning
Keep the connections free of contaminants (such as dirt, oil, etc.) in order to maintain maximum insulation resistance. If the
connections become contaminated, clean them thoroughly with methanol and allow them to dry completely before use.
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Before you install your STA-3108A1
CAUTION
Before you make any connections from an STA-3108A1 to a board in your computer, make sure that
power to your computer and any accessories is OFF.
Remember the following precautions when connecting any hardware to your system:
• Do NOT connect the STA-3108A1 to voltages above those tolerated by other boards in the system. Although the
STA-3108A1 is rated for 60 volts peak-to-peak, the board to which it is connected may be rated for a much lower
voltage. For example, KPCI-3108 analog inputs can only tolerate 35 volts peak without damage and digital I/O will be
damaged by voltages above +5V.
• Do NOT mix your data acquisition inputs with the AC line, or you risk damaging the computer. Data acquisition
systems give users access to inputs of the computer. An inadvertent short between data and power lines can cause
extensive and costly damage to your computer. The manufacturer can accept no liability for this type of accident. To
prevent this problem, use the following precautions:
— Avoid direct connections to the AC line.
— Make sure all connections are tight and sound so that signal wires are not likely to come loose and short to high
voltages.
— Use isolation amplifiers and transformers where necessary.
Figure 2
Pin connections
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Table 1
Pin to terminal connections
Pin Terminal Pin Terminal Pin Terminal
1 1 13 13 25 25
2 2 14 14 26 26
3 3 15 15 27 27
4 4 16 16 28 28
5 5 17 17 29 29
6 6 18 18 30 30
7 7 19 19 31 31
8 8 20 20 32 32
9 9 21 21 33 33
10 10 22 22 34 34
11 11 23 23 35 35
12 12 24 24 36 36
Table 2
Signal mapping
STA-3108-A1 50-pin connector (3M3433)
Pin Signal Pin Signal
45 XOP3/MUX7 46 XOP2/MUX6
43 XOP1/MUX5 44 XOP0/MUX4
49 GNDD 47 +5V
17 CH15/CH7LO 16 CH7
15 CH14/CH6LO 14 CH6
13 CH13/CH5LO 12 CH5
11 CH12/CH4LO 10 CH4
9 CH11/CH3LO 8 CH3
7 CH10/CH2LO 6 CH2
5 CH9/CH1LO 4 CH1
3 CH8/CH0LO 2 CH0
25 GNDA 22 ODAC1
26 GNDA 20 ODAC0
28 XOP4/GEXT
Note: Signal names on the STA-3108A1 50-pin connector are based on signal names
from the 50-pin connector on the EXP-1800.
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Mounting the STA-3108A1
Your STA-3108A1 screw terminal panel is shipped with the hardware necessary for mounting.
To mount the STA-3108A1:
• Place the STA-3108A1 at its operating location with the rubber feet on the mounting surface. Use the four (4) screws to
secure the panel.
Wiring the STA-3108A1
1. Before installing I/O cables and connecting I/O circuits to the STA-3108A1, refer to the User’s Guide for the board(s) to
which you are connecting the STA-3108A1.
2. Attach the 1284CC cable to the 36-pin D connector.
3. Attach the ribbon cable to the 50-pin connector.
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