Manual 1.0
LIH 8+8
Data Acquisition Interface
HEKA Elektronik Phone +49 (0) 6325 / 95 53-0
Dr. Schulze GmbH Fax +49 (0) 6325 / 95 53-50
Wiesenstrae 71 Web Site http://www.heka.com
D-67466 Lambrecht/Pfalz Email sales@heka.com
Germany support@heka.com
HEKA Electronics Inc. Phone +1 902 624 0606
47 Keddy Bridge Road Fax +1 902 624 0310
R.R. #2 Web Site http://www.heka.com
Mahone Bay, NS B0J 2E0 Email nasales@heka.com
Canada support@heka.com
HEKA Instruments Inc. Phone +1 516 882 1155
20E Vanderventer Ave Fax +1 516 467 3125
Suite 102 Web Site http://www.heka.com
Port Washington, NY 11050 Email ussales@heka.com
U.S.A. support@heka.com
Title Page: LIH 8+8 Acquisition Interface
©
2007 HEKA Elektronik Dr. Schulze GmbH
COMLMA/1
Contents
1 Introduction 1
1.1 Product Intended Usage . . . . . . . . . . . . . . . . . . . . 1
1.2 Supplied Components . . . . . . . . . . . . . . . . . . . . . 1
1.2.1 For a single rack unit: . . . . . . . . . . . . . . . . . 1
1.2.2 For a dual rack unit: . . . . . . . . . . . . . . . . . . 2
1.3 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 Computer Requirements . . . . . . . . . . . . . . . . . . . . 2
1.4.1 Macintosh . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4.2 Windows . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5 Hardware Description . . . . . . . . . . . . . . . . . . . . . 3
1.5.1 Main Features: . . . . . . . . . . . . . . . . . . . . . 4
1.5.2 Hardware Configuration . . . . . . . . . . . . . . . . 4
1.5.3 Isolation . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5.4 Analog Circuitry . . . . . . . . . . . . . . . . . . . . 5
1.5.5 Differential Inputs . . . . . . . . . . . . . . . . . . . 7
1.5.6 FIFO Memory . . . . . . . . . . . . . . . . . . . . . 7
1.5.7 USB 2.0 Benefits . . . . . . . . . . . . . . . . . . . . 7
1.5.8 Expandability . . . . . . . . . . . . . . . . . . . . . . 8
1.5.9 Tone Generator . . . . . . . . . . . . . . . . . . . . . 9
1.5.10 Software Support . . . . . . . . . . . . . . . . . . . . 9
ii CONTENTS
2 Technical Specifications 11
2.1 Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Trigger Input . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.5 Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.6 Tone Generator . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.7 Additional Connectors . . . . . . . . . . . . . . . . . . . . . 13
2.8 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.9 Power Requirements . . . . . . . . . . . . . . . . . . . . . . 13
2.10 Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.11 Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.12 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 Installation 15
3.1 Connecting the LIH 8+8 . . . . . . . . . . . . . . . . . . . . 15
4 Controls and Functions 17
4.1 Front-panel Controls . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Rear panel controls . . . . . . . . . . . . . . . . . . . . . . . 20
5 Troubleshooting 23
6 Warranty and Support 35
6.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.2 Limitation of Liability . . . . . . . . . . . . . . . . . . . . . 36
6.3 Obtaining Warranty Service . . . . . . . . . . . . . . . . . . 37
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CONTENTS iii
6.4 Obtaining Out-of-Warranty Service . . . . . . . . . . . . . . 37
6.5 Technical Support . . . . . . . . . . . . . . . . . . . . . . . 37
7 Appendix I: Technical Data 39
7.1 DIGITAL I/O Connector . . . . . . . . . . . . . . . . . . . 39
7.2 DIGITAL IN Connector . . . . . . . . . . . . . . . . . . . . 41
7.3 DIGITAL OUT Connector . . . . . . . . . . . . . . . . . . . 42
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List of Figures
1.1 Schematic illustrating 100 µs data acquisition of two pairs
of input channels (AD-0, AD-1 and AD-2, AD-3). The 5 µs
time delay is shown in the insert. . . . . . . . . . . . . . . . 6
4.1 LIH 8+8 Front Panel Controls . . . . . . . . . . . . . . . . 17
4.2 LIH 8+8 Rear Panel Controls . . . . . . . . . . . . . . . . . 20
7.1 Digital I/O Connector . . . . . . . . . . . . . . . . . . . . . 40
7.2 Digital IN Connector . . . . . . . . . . . . . . . . . . . . . . 41
7.3 Digital OUT Connector . . . . . . . . . . . . . . . . . . . . 42
1. Introduction
1.1 Product Intended Usage
The HEKA LIH 8+8 is intended for research use only in a laboratory by
persons trained in its use. Users are expected to be able to properly operate
the LIH 8+8 and associated instruments.
The HEKA LIH 8+8 is not intended for medical use. The HEKA LIH 8+8
is not intended for use in life support situations, or in situations were
improper operation or failure of the LIH 8+8 can result in personal injury.
HEKA makes no representation that the design, implementation, testing, or
manufacture of the LIH 8+8 meet reasonable standards for use as a medical
product. As stated in the HEKA Limited Warranty Statement, supplied
with each product, HEKA expressly disclaims all warranties to buyer except
the limited warranty set forth above, including without limitation to any
and all implied warranties of merchantability and fitness for a particular
purpose.”
1.2 Supplied Components
The following items should have been packed with your LIH 8+8 Data
Acquisition System:
1.2.1 For a single rack unit:
1 LIH 8+8 data acquisition interface
1 USB 2.0 shielded cable (3 meters)
1 HEKA CD-ROM
2 Introduction
1 Printed user’s manual
1 power cord (110 or 220 Volt depending on application)
1.2.2 For a dual rack unit:
2 LIH 8+8 data acquisition interface
2 USB 2.0 shielded cable (3 meters)
1 HEKA CD-ROM
1 Printed user’s manual
2 power cord (110 or 220 Volt depending on application)
If any of these items are missing please contact HEKA or your dealer immediately.
1.3 Unpacking
After unpacking the LIH 8+8 and accessories from the shipping carton,
please inspect each piece for any signs of shipping damage. Please contact
the delivering carrier and HEKA immediately if there is any damage. Do
not dispose of the shipping carton. The carrier will want to examine the
shipping carton to process a damage claim. HEKA insures all shipments
to cover shipping damage. It is also advisable to keep the shipping carton
in the event that the instrument must be returned for service.
1.4 Computer Requirements
1.4.1 Macintosh
Macintosh G5 or faster processor
Mac OS X (10.39 or higher)
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1.5 Hardware Description 3
Available USB 2.0 Hi-Speed port (480 Mbits/second)
CD-ROM or internet access
1.4.2 Windows
Pentium 4 or faster processor
Windows 2000, XP or Vista
Available USB 2.0 Hi-Speed port (480 Mbits/second)
CD-ROM or internet access
Please note that many newer computer systems are supplied with multiple USB 2.0 ports, but only some of these ports are capable of Hi-Speed
operation. The LIH 8+8 will work on the slower speed ports, but the
maximum transfer rates will be greatly reduced. For optimal performance,
the LIH 8+8 should only be connected to a USB 2.0 Hi-Speed port.
If your computer system does not have a Hi-Speed USB 2.0 port, then
a USB 2.0 adapter may be used. These adapters are available in many
configurations (PCI, PC Slot, etc).
1.5 Hardware Description
The LIH 8+8 is a high resolution, low-noise scientific data acquisition system. It was specifically designed for electrophysiological applications, but
it’s versatility, allows it to be used for any general purp ose data acquisition
need.
The LIH 8+8 utilizes the latest Analog to Digital, Digital to Analog,
USB 2.0 and high-speed processor technologies to provide expandability
and versatility for all current and future requirements. With it’s USB 2.0
Hi-Speed interface, the LIH 8+8 is truly a plug-and-play device that can
be easily migrated from various computer systems and measuring setups.
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4 Introduction
1.5.1 Main Features:
Expandable fully synchronized data acquisition system
All synchronous analog and digital channels are isolated
Eight differential analog input channels
Two 16-bit 200 kHz A/D converters multiplexed into two banks of
four input channels
Simultaneous sampling on two channels (one from each bank) at
200 kHz per channel, 400 kHz aggregate rate
Analog input / output range: ±10.24 Volts
Four 16-bit pseudo differential analog output channels
Sixteen synchronous digital input channels
Sixteen synchronous digital output channels
Master / Slave clock circuitry for multi-unit synchronization
USB 2.0 host interface offers true plug-and-play installation
Can be used with Laptop and small form factor computer systems
(iMac, Mac mini, etc)
Compatible with Windows (2000, XP, and Vista), Mac OS X (10.39
and above, PPC or Intel processor)
1.5.2 Hardware Configuration
The LIH 8+8 is a rack-mountable data acquisition unit. It has BNC
connectors on the front panel for the eight analog inputs, the four analog
outputs, and four each of the digital inputs and outputs. All of the digital input and output lines are available on ribbon-cable connectors located
on the rear panel. The LIH 8+8 is connected to a host computer’s USB
2.0 Hi-Speed (480 Mbits/second) port over a shielded USB 2.0 cable (3
meters). The LIH 8+8 is compatible with Mac OS X (10.39 and above)
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1.5 Hardware Description 5
and Windows (2000, XP or Vista). The host operating system treats the
LIH 8+8 as it would any Flash memory device. Therefore only standard
operating system files are required. Moving the LIH 8+8 from one computer platform to another is a simple matter of connecting a USB cable
and installing the proper data acquisition software.
1.5.3 Isolation
All of the analog input and output channels of the LIH 8+8 are isolated
from the digital electronics used to communicate with the computer. This
isolation is achieved with state of the art high-speed digital isolator’s. This
isolation is provided to eliminate computer electrical noise from the analog measurements. Computers contain digital electronics that switch at
high-speed producing large electrical transients. The computer ground
functions as the return path for these transients resulting in substantial
high-frequency ground noise. Each analog input and output channel of
the LIH 8+8 has it’s own separate ground path that is isolated from the
computer ground. Therefore, computer ground noise is not coupled into
the measurement. Isolation is almost essential if low-noise analog outputs
are provided as with the LIH 8+8. If the analog outputs are not electrically isolated from the computer ground, the analog output ground will
contain computer-generated noise. This is one of the major ways by which
computer-generated noise is introduced into a measurement system. The
isolation of the LIH 8+8 brings with it another benefit that simplifies
complex measurement system s. Since the analog inputs and outputs of
the LIH 8+8 float with resp ec t to ground, the LIH 8+8 and the host
computer are not a source of ground loop problems.
1.5.4 Analog Circuitry
The LIH 8+8 provides eight analog differential inputs, four analog pseudodifferential outputs, sixteen digital inputs and sixteen digital outputs. All
channels are sampled synchronously.
The eight analog input channels are separated into two banks of four. One
bank is comprised of A/D input channels 0,2,4 and 6 and the other of 1,3,5
and 7. Each bank is multiplexed into one 16-bit 200 kHz A/D converter.
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6 Introduction
Both A/D converters sample simultaneously at the maximum conversion
rate resulting in a total throughput of 400 kHz. If the bandwidth of the
experiment calls for lower sampling rates, then the hardware will adjust
the rate accordingly.
The simultaneous sampling arrangement allows pairs of channels, for example the Current and Voltage signals from a Patch Clamp Amplifier, to be
digitized without phase-shift. The analysis of high-frequency correlation
between these cophasic signals is simplified since there is no time offset
between sample points on these input channels. Also, during this cophasic acquisition, there will be no time delay between the firing of two D/A
channels and the sampled inputs. If more than one pair of input channels
are acquired, then a 5 µs sampling delay will occur. See illustration below.
Figure 1.1: Schematic illustrating 100 µs data acquisition of two pairs of
input channels (AD-0, AD-1 and AD-2, AD-3). The 5 µs time delay is
shown in the insert.
The four 16-bit D/A converters feature high accuracy with low noise. This
low noise allows for the observation of least significant bit transitions. The
D/A converters update simultaneously.
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1.5 Hardware Description 7
1.5.5 Differential Inputs
The LIH 8+8 was designed with differential A/D inputs to provide the
most accurate measurements. Differential inputs are isolated inputs since
they are referenced to a ground point that is not connected to earth ground.
Therefore, differential inputs eliminate common-mode voltage errors that
can occur and are required for measuring low-level signals.
Other data acquisition interfaces that use single-ended analog inputs are
non-isolated inputs that are referenced to earth ground. Non-isolated systems also connect the digital I/O signals to the same ground. If the recording setup shares the same ground as the data acquisition interface, typically
via the building’s AC power, the difference in ground potential between the
two devices can be substantial. Fast switching currents must then travel
between the various devices of the recording setup to the computer. Depending on how single-ended inputs are connected, ground-loop errors can
be introduced resulting in inaccurate measurements.
1.5.6 FIFO Memory
The LIH 8+8 is supplied with two 512 kilosample FIFOs, one each for
input and output data points. The combination of these FIFOs and the
high-speed data transfer of the USB Bus allows high-speed continuous data
acquisition to be performed independent of the activity of the host computer.
1.5.7 USB 2.0 Benefits
1.5.7.1 True Plug-and-Play
Simply connect the LIH 8+8 to an available Hi-Speed USB 2.0 port on the
host computer system using the supplied USB cable. The computer will
automatically identify the LIH 8+8 and install the appropriate system
drivers, if needed. This connection scheme greatly reduces start-up time.
It is no longer necessary to open the computer to add a board. Simply
make all of the connections to the recording setup and execute the data
acquisition software. Within minutes, data can be acquired.
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8 Introduction
1.5.7.2 Greater Computer Support
In the past, many data acquisition devices could only be interfaced to highend desktop computers with available bus slots (i.e. ISA, PCI, etc). This
typically meant that only larger foot-print and more expensive computer
systems could be used. Today, virtually all desktop and laptop computers
on the market provide USB ports. It is now possible to use low-cost, small
form factor systems (i.e. iMac, Mac mini, etc) with the LIH 8+8 for data
acquisition applications.
1.5.7.3 Hot-Swappable
Another advantage of the USB based LIH 8+8 data acquisition interface
is that it can be installed or removed while the computer is running. Just
plug the device in, use it, and unplug it when done. There is no need to
power down the computer. The LIH 8+8 is self-enumerating and selfidentifying. The device driver is dynamically loaded when connected and
dynamically unloaded when unplugged.
1.5.8 Expandability
If an application requires more channels than are available on a single
LIH 8+8, then multiple units can be connected and fully synchronized.
Each LIH 8+8 unit requires a dedicated Hi-Speed USB 2.0 p ort and an
external cable connection between the units. This external connection is
used to synchronize the acquisition clocks of the units and is made with
a standard CAT5 patch cable. Note that LIH 8+8 interfaces installed on
separate computers use a single external trigger to start the multiple units
simultaneously.
Important note: The hardware design of the LIH 8+8 will
al low any number of units to be installed, only limited by the
number of available Hi-Speed USB 2.0 ports. Currently there is
a software limitation which only allows one master /slave combination, basically doubling all of the input and output channels.
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1.5 Hardware Description 9
1.5.9 Tone Generator
The LIH 8+8 has a built-in tone generator that is controlled by software.
The tone generator has a frequency range between 200 Hz and 4 kHz. A
3.5 mm audio connector is provided on the rear panel for connection to an
amplified speaker or headset.
One of the features of the PATCHMASTER software is the capability to
play a sound that is proportional to R-membrane. This is typically used for
monitoring seal-resistance. This feature was originally supported via the
sound output hardware of the host computer. Over the years many sound
board and chipset manufacturers dropped support of various commands
that were used by PATCHMASTER to generate this sound. This made it
very difficult to support this feature other than on a few computer systems.
By adding the tone generator directly to the data acquisition interface, this
feature can now be easily supported in all computer systems without any
additional hardware or software.
1.5.10 Software Support
The LIH 8+8 is fully supported by the following HEKA software packages:
PATCHMASTER
CHARTMASTER
POTMASTER
TIDA
A Windows DLL (Dynamic Link Library) is available for software developers that are interested in writing their own Windows applications. Please
contact HEKA for further details.
IgorPro XOPs (“external operations”) are also available for c ontrolling the
LIH 8+8 directly from WaveMetrics IgorPro (5.0 or later) software. The
LIH XOP’s are free of charge, and can be downloaded directly from the
HEKA website. Please note that currently, only a Windows version is
available.
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10 Introduction
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2. Technical Specifications
2.1 Analog Inputs
Number of channels: 8
2 ADC multiplexed into 4 inputs
Bank 0 - channels 0,2,4 and 6
Bank 1 - channels 1,3,5, and 7
Input type: differential, isolated
Input connector: BNC on front panel
Resolution: 16-bit, (1 in 65536)
Sampling rate: 400 kHz aggregate, 200 kHz per ADC
Input range: -10.24 to +10.239 Volts
Differential non-linearity: 0.002 % of FSR
Drift: ±2 ppm/
Input impedance: 1 MΩ
Signal to noise ratio: 86 dB at DC to 160 kHz, <1 mV PP
No missing codes: 16-bit
Crosstalk between ADC: not measurable
Crosstalk between banks: -110 dB, 20 Volt 1 kHz sine wave input
Maximum over voltage: ±35 Volts
2.2 Digital Inputs
Number of channels: 16, isolated
Input type: 3.3 and 5 Volt logic compatible
Minimum pulse width: 150 ns
Input connectors: 3 on front panel BNC
all on rear panel DB-25 connector
Maximum over voltage: ±30 Volts D.C.
12 Technical Specifications
2.3 Trigger Input
Number of channels: 1, isolated
Input type: 3.3 and 5 Volt logic compatible
Minimum pulse width: 30 ns
Operational mode: software selectable
positive or negative edge transition
Input connector: BNC on front panel
Maximum over voltage: ±30 Volts D.C.
2.4 Analog Outputs
Number of channels: 4, individual DAC
Output type: pseudo differential, isolated
Output connector: BNC on front panel
Resolution: 16-bit, (1 in 65536)
Settling time: <1 µs
Output range: -10.24 to +10.239 Volts
Gain error: 0.2 % of FSR
Gain linearity: <2 dB
Drift: ±4 ppm/
Output impedance: 4.7 Ω
Signal to noise ratio: 116 dB
Short circuit to ground: indefinite
Current output: ±20 mA maximum
2.5 Digital Outputs
Number of channels: 16, isolated
Input type: TTL logic compatible
Input connectors: 4 on front panel BNC
all on rear panel DB-25 connector
Power-on state: logic low
Maximum output current: ±35 mA
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2.6 Tone Generator 13
2.6 Tone Generator
Frequency range: between 200 Hz and 4 kHz
Output connector: 3.5 mm audio jack on rear panel
2.7 Additional Connectors
USB: USB 2.0 female B connector on rear panel
Digital IO: 40 pin male connector on rear panel
for interfacing with EPC 8 or TIB 14
Master sync: RJ-45 (CAT5) connector on rear panel
Slave sync: RJ-45 (CAT5) connector on rear panel
2.8 Dimensions
Width: 47.5 cm (19 inches)
19 inch rack mountable
Height: 4.375 cm (1.75 inches)
Depth: 31.1 cm (12.5 inches)
Weight: 3.6 kg (8 pounds)
2.9 Power Requirements
Input voltage: 90 VAC - 250 VAC
Input frequency: 50/60 Hz
Maximum power: 30 watts
2.10 Cables
USB: 3 meter USB 2.0 shielded cable
Power cord: 2 meter IEC type
supplied with either a USA, UK, AU or EU version
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14 Technical Specifications
2.11 Host Interface
USB 2.0: Hi-Speed (480 Mbits/second)
2.12 Warranty
Duration: One year parts and labor
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3. Installation
3.1 Connecting the LIH 8+8
1. The LIH 8+8 can be installed into a standard nineteen-inch instrument rack or used as a desktop unit. If installing on a rack, please
do not use the LIH 8+8 as a shelf to support any other instrument.
The LIH 8+8 case was not designed to do this and damage to the
front panel will result. To minimize noise, it is advisable to mount
the LIH 8+8 away from devices that emit high-frequency signals (i.e
monitors, power supplies, etc).
2. Connect the power cord to the LIH 8+8. The internal power supply
used in the LIH 8+8 is an auto switching multi-voltage supply that
will operate from 90 Volts to 250 Volts. Make sure that the LIH 8+8
power cord is plugged into a properly grounded AC receptacle. Improper grounding of the LIH 8+8 could result in an electrical shock
hazard. It is advisable to plug all equipment into a common outlet
strip. This will minimize power line induced noise in the system.
3. Install the USB cable from the USB connector on the rear panel of
the LIH 8+8, labeled USB, to an available USB 2.0 Hi-Speed port
on the computer. This connection should be made directly to the
computers USB 2.0 port and not to a USB HUB.
4. As soon as the LIH 8+8 is detected by the host operating system
the appropriate system files will be initialized and the LIH 8+8 will
be ready for use.
Important note: The host operating system treats the
LIH 8+8 as it would any Flash memory device. Therefore, only standard operating system files are required. This
provides ease of installation and flexibility for moving the
LIH 8+8 from one computer system to another.
16 Installation
5. If multiple LIH 8+8 interfaces are to be connected, repeat the steps
as outlined above for each unit. In addition, for the acquisition clocks
to be properly synchronized, a connection b e tween the Master clock
output of one unit to the Slave clock input of the other (connectors
located on the rear panel) must be made using standard CAT5 patch
cables.
Important note: Please note that the sync clock is a highfrequency signal. The shortest possible length patch cable
should be used.
6. Before powering up, please recheck all connections. If all connections
are proper then the power LED will illuminate once the LIH 8+8 is
powered ON.
Important note: Please note that the Status LED will not
be illuminated until the acquisition software has initialized
the interface.
The LIH 8+8 is now connected and ready to go.
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4. Controls and Functions
4.1 Front-panel Controls
Figure 4.1: LIH 8+8 Front Panel Controls
1. DAC Outputs: Four BNC connectors provide access to the four
individual 16-bit Digital to Analog converter outputs. The acquisition software controls the D/A channels output voltage and timing.
The D/A channels have an output range of ±10.24 Volts and can be
simultaneously used for waveform generation. The D/A channels are
isolated from the computer. For optimal results, use only high-quality
75 Ω BNC cables.
Important note: Do not under any circumstances connect an output to any of the D/A channels. Otherwise the
D/A circuitry can be damaged.
2. ADC Inputs: Eight BNC connectors provide access to the 16-bit
Analog to Digital converter input channels. The eight analog input
18 Controls and Functions
channels are separated into two banks of four. Each bank is multiplexed into one 16-bit 200 kHz A/D converter. The acquisition
software controls the A/D channel selection and sampling interval
timing. The A/D channels have an input range of ±10.24 Volts.
These channels are isolated from the computer. For optimal results,
use only high-quality 75 Ω BNC cables. Also, since the A/D channels
are differential, the BNC cables must have a very good continuous
shield to both ends of the cable. The shield of the BNC connector
must also have a reference connected to it. If the BNC connector
shield is left unconnected unexpected results can occur.
Important note: Do not under any circumstances exceed
the maximum input voltage allowed of 15 Volts peak.
3. Status Indicator LED: The Status LED will be illuminated when
the LIH 8+8 has been properly initialized and ready for use.
4. External Trigger Input: A BNC connector provides access to the
Trigger input circuitry of the LIH 8+8. A TTL trigger pulse can
be given to start data acquisition. The LIH 8+8 can be triggered
with either a positive or negative logic pulse, depending on software
settings, with a minimum duration of 30 ns. This input is isolated
from the computer.
Important note: The absolute maximum voltage range
for this input is -0.5 to +5.5 Volts. Do not exceed this
range or damage can result to the input circuitry.
5. Digital Inputs: Three BNC connectors provide access to three of
the sixteen Digital Input channels. These Digital Inputs can be read
by the acquisition software. These Digital Input channels accept
standard TTL level inputs (5 Volts and 0 Volts). These channels are
isolated from the computer. For optimal results, use only high-quality
75 Ω BNC cables.
Important note: The absolute maximum input voltage
range is -0.5 to +5.5 Volts. Do not exceed this range or
damage can result to th e input circuitry.
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4.1 Front-panel Controls 19
6. Digital Outputs: Four BNC connectors provide access to four of the
sixteen Digital Output channels. The acquisition software can control
the state of the Digital Output channels. These Digital channels
output standard TTL levels (5 Volts and 0 Volts). These channels
are isolated from the computer. For optimal results, use only highquality 75 Ω BNC cables.
7. Chassis Ground: A 4 mm banana receptacle provides connection
to the chassis ground of the LIH 8+8 interface.
8. Power Indicator LED: The power LED will be illuminated when
the LIH 8+8 is connected to the power line and sw itched ON.
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20 Controls and Functions
4.2 Rear panel controls
Figure 4.2: LIH 8+8 Rear Panel Controls
1. Power Switch: A rocker-style On/Off switch is used to control the
LIH 8+8. When the sw itch is toggled to the ON position, then the
green Power LED indicator on the front panel will be illuminated.
2. Line Power Input: A three wire male IEC connecter accepts stan-
dard three wire IEC female type power cords. The appropriate power
cord has been provided with the LIH 8+8. The internal power supply used in the LIH 8+8 is an auto- switching multi-voltage supply
that will operate from 90 Volts to 250 Volts. It is advisable to plug
all equipment into a common outlet strip. This will minimize power
line induced noise (sixty / fifty hertz signals) in the acquired data.
Important note: To avoid a shock hazard, the LIH 8+8
must be plugged into a properly grounded AC power outlet.
3. Fuse: A F1.0A 20 mm fuse is used to protect the internal power
supply of the LIH 8+8. If the fuse needs to be replaced, only replace
with a 20 mm type F1.0A fuse.
4. Digital Outputs: A DB-25 female connector provides access to the
sixteen isolated digital output lines. Four of the sixteen output lines
are also brought out on the front panel (OUT-0 to OUT-3). All
digital outputs are fully synchronous with the analog I/O and are
controlled by the acquisition software. To mate to this connector use
3M electronics 8225-7003 series or equivalent. Pin-out assignments
can be found in Appendix I of this manual.
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4.2 Rear panel controls 21
5. Digital I/O: A 40-pin male connector combines the Digital Output
and Input lines of the LIH 8+8. This specialized connector is required for interfacing with other HEKA devices such as the EPC 8
Patch Clamp Amplifier or the TIB 14S Trigger Interface. To mate to
this connector use 3M electronics 3417 series or equivalent. Pin-out
assignments can be found in Appendix I of this manual.
Important note: The Digital Output and Input lines on
this connector are parallel to the main Digital OUT and
Digital IN lines and not in addition to.
6. Digital Inputs: A DB-25 male connector provides access to the
sixteen isolated Digital Input lines. Three of the sixteen input lines
are also brought out on the front panel (IN-0 to IN-2). All Digital
Inputs are fully synchronous with the analog I/O and can be read by
the acquisition software. To mate to this connector use 3M electronics
8225-7003 series or equivalent. Pin-out assignments can be found in
Appendix I of this manual.
Important note: The absolute maximum voltage range
for these inputs is -0.5 to +5.5 Volts. Do not exceed this
range or damage can result to the input circuitry.
7. Slave Sync: A RJ-45 connector provides the clock input for synchronizing acquisition clocks between LIH 8+8 interfaces. A standard
CAT5 patch cable is used to connect the Master output of one unit
to the Slave input of the other.
Important note: This is a high-frequency clock signal.
To minimize jitter and noise, use the shortest length patch
cable possible.
8. USB 2.0: A USB 2.0 type B female connector for attaching a USB
cable which enables connection to the host computer’s Hi-Speed USB
2.0 port.
Important note: Only a shielded USB 2.0 cable should
be used. Non-shielded cables can lead to USB communication errors. Also, the LIH 8+8 should only be directly
connected to the computers Hi-Speed USB 2.0 port.
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22 Controls and Functions
9. Master Sync: A RJ-45 connector provides a 33 MHz clock output
for synchronizing the acquisition clocks between LIH 8+8 interfaces.
A standard CAT5 patch cable is used to connect the Master output
of one unit to the Slave input of the other.
Important note: This is a high-frequency clock signal.
To minimize jitter and n oise use the shortest length patch
cable possible.
10. Sound Output: A standard 3.5 mm audio connector is provided for
connection to an amplified speaker or headset. The tone generator
has a frequency range between 200 Hz and 4 kHz which is controlled
by software.
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5. Troubleshooting
Most problems arise from incorrect installation of the hardware, and/or
incorrect use of the software. When troubleshooting, it is best to simplify
both software and hardware configurations as to remove as many unknowns
as possible. This chapter will address some of the most common problems.
Make sure that no other programs are actively running including
virus checking and internet access software.
Disconnect ALL external instruments and test the LIH 8+8 /computer combination by itself.
If possible, swap in a known working LIH 8+8 as a quick way to
determine if the problem is the LIH 8+8 or the computer.
Make sure that the latest versions of the application software are
installed.
1. Power Switch not Illuminated:
(a) First check that the power switch, located on the rear panel, is
toggled to the ON position.
(b) Check to see that the AC line cord is plugged in correctly. If
attached to a power strip, check that the power strip switch is
in the ON position and the circuit breaker has not tripped.
(c) Check the fuse located on the rear panel. The fuse can be easily
removed by using a flat blade screwdriver. If the fuse needs to
be replaced, please use the appropriate fuse type as listed in the
Control section of this manual.
Important note: Always test the condition of the
fuse with either an ohm-meter (Digital Multimeter) or
a continuity tester. Visual inspection may not be valid.
24 Troubleshooting
2. Status LED not Illuminated: The Status LED is illuminated once
the application program has successfully initialized the LIH 8+8
hardware. The LIH 8+8 cannot be properly initialized if the device
driver or the application software is not properly installed.
(a) Check that the USB 2.0 cable is firmly attached to both the
back of the interface and the host computer. Make sure that
the cable is not damaged.
(b) If the USB 2.0 cable is attached to a HUB, then disconnect the
cable and connect directly to a Hi-Speed USB 2.0 port.
(c) Check that a shielded USB 2.0 cable is used. Non-shielded cables
can lead to USB communication problems that manifest in a
variety of odd behaviors.
(d) To verify that the LIH 8+8 is connected please do the following:
i. Windows:
A. Click on My Computer.
B. In the section ”Devices with Removable Storage” the
device HEKA LIH88 should be visible.
ii. Mac OS X:
A. The device HEKA LIH88 will be displayed on the desk-
top.
(e) Hardware Reset: To properly reset the LIH 8+8 two steps are
required. First, the power must be cycled OFF and then ON.
Next, the USB interface must be reset by disconnecting and
reconnecting the USB cable. This will also cause the USB driver
to unload and reload.
Important note: In a Windows system, if sound is
enabled, a beep will be heard when the operating system
has loaded / unloaded the USB driver. Once the USB
cable is disconnected wait to hear this beep before reconnecting the cable otherwise the driver may not load
correctly.
3. Driver Errors: The LIH 8+8 identifies itself to the host operating
system without the need of any additional driver files. However, for
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25
the application software to communicate with the LIH 8+8 the files
LIH88Driver.dll and LIH88Service.exe are required. These files are
provided and installed by the application program itself. If driver
errors are displayed while running the application software, verify
that these files exist in the applications working directory.
4. Data Throughput Issues: Data throughput problems can be
caused by any number of things including: CPU speed, hard disk
speed, available RAM, etc. The following can be easily verified:
(a) Check that the LIH 8+8 is connected to a USB 2.0 Hi-Speed
port (as outlined above), and that the port is not shared by any
other device. USB specifications allows up to 127 devices to be
connected on a single USB port. This is very reasonable for low
bandwidth devices, but not recommended for high-speed devices
like the LIH 8+8 data acquisition system.
(b) Check that the acquisition program has enough RAM available.
During Acquisition it is advisable to disable any software applications, including virus checkers and screen savers, that are not
required.
5. Hardware Verification: The operation of the LIH 8+8 inter-
face can be verified by using the I/O Control Window in either the
PATCHMASTER, CHARTMASTER, POTMASTER or EPCMASTER software. The EPCMASTER software is designed
specifically for testing the various HEKA amplifiers and interfaces.
The EPCMASTER software is available for free download from
www.heka.com. A software security key (dongle) is not required.
Basic functionality testing of the LIH 8+8 can b e performed with
any of the above mentioned software applications. The instructions
and screen images used in the following procedures are based on the
EPCMASTER software. The same basic instructions would apply
to all of the other software applications as well.
First, the following is a brief description of the basic input conventions
used in all of the HEKA software products. This introduction only
covers the input types that are needed to properly execute the test
procedures outlined below. For a complete description please refer to
the user’s manual included with the software package.
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26 Troubleshooting
As with all GUI based software application the HEKA software products rely on the mouse (or other pointing device) for most of the user
interaction. An assumption is made that the user has a working
knowledge of the operating systems various input devices and conventions.
The HEKA software outlined above is supported on both Mac OS
and Windows platforms. For the scope of this discussion the only
difference between the two is the mouse click. For Window systems
that have a multi button mouse, then a left-click is used. For Mac
OS systems that have a single button mouse, a single-click is used.
The dialog controls used in the I/O Control Window are as follows:
Drag box: A number within a box with a drop
shadow can be changed by either a mouse drag or keyboard
entry. The mouse drag is accomplished by first positioning the
mouse pointer over the value. While holding down the left mouse
button, drag the mouse up or down to increase / decrease the
value.
Important note: When the drag mode is active the
mouse pointer will change to an up-down arrow combi-
nation.
When the mouse button is released the value will be set and
the mouse pointer will return to it’s original state. Alternatively, the value can be changed via a keyboard entry by either
double-clicking on the value, or`Shift´-click, or`Right´-click
(Windows), and then typing in the new value. Keyboard input
will terminate once the`Return´or`Enter´key are pressed.
Using`Tab´will cycle through all Drag items in the active window.
Rounded corner rectangle: A text label within a
rounded corner rectangle will behave like a momentary switch.
To activate the switch, position the mouse pointer on any part
of the rectangle and click with the mouse button.
Simple rectangles (without drop shadow): A
text label within a rectangle is used to display a measured value.
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27
This dialog is for display only and cannot be changed by the user.
Check box: A square box, with or without a text
label on the outside of it, behaves like a toggle switch. To toggle
the switch, position the mouse pointer on the center of the check
box and click with the mouse button. An X within the check box
represents an ON condition while a hollow box represents
OFF.
(a) Start the software application. If the default configuration was
saved in a previous session, then hardware and software initialization will begin immediately. Otherwise, the following message
window will be displayed.
(b) Select Set Defaults. The hardware selection window will be
displayed.
(c) Select the option EPC 7 and others and the interface LIH 8+8.
Since these test procedures are geared for testing the LIH 8+8
the amplifier selection of EPC 7 and others is used to basically
specify “no amplifier.”
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28 Troubleshooting
Important note: The procedures outlined below are
for testing the stand-alone version of LIH 8+8. They
are not to be used for testing the functionality of an
LIH 8+8 built into an EPC 10 USB Patch Clamp
Amplifier. Those test procedures are outside the scope
of this manual.
(d) Before selecting Continue verify that the check box Activate
AD/DA-board is enabled. Otherwise, the LIH 8+8 interface will
not be initialized and the software will execute in “Demo mode.”
(e) Select Continue. The software will now proceed with software
and hardware initialization. If the software applications Main
control window is displayed, this is a positive sign that the
LIH 8+8 has been properly detected and initialized. Proper
initialization can be visually confirmed by verifying that the
Status LED on the front panel is illuminated.
If the following error window is displayed:
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29
The sound driver is not properly installed. Select retry to initialize the driver once more or abort to terminate the sound
driver initialization. If abort, is selected then LIH 8+8 initialization will continue, since this is not considered a fatal error.
If any of the following error windows are displayed, testing
should be terminated. These errors are considered fatal errors.
The driver is not properly installed. Select Exit to terminate
the program. Selecting continue will force the software into
“Demo mode” resulting in false test results.
Important note: Please refer to trouble shooting
item “Driver Errors” above for further assistance.
(f) To open the I/O Control Window go to the menu bar. Select
the menu Window and then I/O Control.
The I/O Control window will appear. The controls within this
window will be used to verify the basic input and output operation of the LIH 8+8.
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30 Troubleshooting
(g) Checking the D/A Outputs: The most accurate way to ver-
ify the operation of the D/A channels is with either a Digital
Multimeter (DMM or DVM) or an oscilloscope. One of the
LIH 8+8 A/D inputs can also be used (if it is known to be
working and properly calibrated).
i. Connect the D/A channel to be tested directly to the mea-
suring device using the appropriate BNC cable.
ii. The D/A channel voltage can be set by using the appropri-
ate drag box dialog located under the label DA-Channels.
D/A Channel 0 is the leftmost drag box. The other channels
follow in sequence from left to right.
Once a new value has been entered, the output voltage on
the D/A will be changed. The D/A channel number and
value will also be displayed in the Notebook Window.
iii. If the value displayed on the me asuring device is similar
to the specified value, the D/A channel is working correctly. For proper testing output voltages of -10, -5, 0, 5
and 10 Volts should be verified for each output channel.
Important note: A minor difference between the
set and measured value is normal. If the difference
is more than a few millivolts, please contact HEKA
technical support for assistance.
iv. Repeat the steps outlined above for all remaining D/A chan-
nels.
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31
(h) Checking the A/D Inputs: The most accurate way to verify
the operation of the A/D channels is with a calibrated voltage
source. If the D/A channels of the LIH 8+8 have been verified
they can be used.
i. Assuming that a D/A output to be used has been verified
(refer to instructions above for reference) connect the D/A
to the A/D channel to be tested.
ii. Set the D/A output voltage.
iii. The measured A/D input will be displayed automati-
cally on the rectangle boxes located under the text label
AD-Channels. The readings for A/D channels 0 to 3 are
displayed from left to right on the upper row while channels
4 to 7 are on the lower.
iv. If the measured value is similar to the D/A output, the
A/D channel is working properly. For proper testing, output
voltages of -10, -5, 0, 5 and 10 Volts should be used for each
input channel.
Important note: A minor difference between the
output and input value is normal. If the difference
is more than a few millivolts p lease contact HEKA
technical support for assistance.
v. Repeat the steps outlined above for the remaining A/D
channels.
(i) Checking the Digital Outputs: The most accurate way to
verify the operation of the Digital Outputs is with either a DMM
or an oscilloscope. The LIH 8+8 Digital Inputs or A/D channels
can also be used (if they are known to be functional).
i. Connect the Digital Output to be tested directly to the
measuring device.
Important note: Digital Outputs 0 to 3 are available on BNC connectors on the front panel and can
be easily accessed. All of the Digital Outputs are
available on a DB-25 connector on the rear panel
labeled “DIGITAL OUT.” To access these channels
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32 Troubleshooting
a breakout cable will have to be fabricated. Please
refer to Appendix I of this manual for a complete
pin-out description.
Important note: It may be tempting to insert
the tip of either the oscilloscope probe or the DMM
directly into the DB-25 connector, but it is not recommended. Damage to both the probe and connector
can occur.
ii. First, it is always best to start the test procedure by setting
all of the Digital Outputs to a known state. The Clear
button provides an easy way to set all of the Digital Outputs
to OFF (TTL LOW).
iii. There are a couple of ways to control the status of the Dig-
ital Outputs. The check box item Single Bit provides a
way to set either one or multiple Digital Outputs at a time.
If enabled, only one output channel at a time can be active.
The others will be automatically cleared. If disabled, the
state of multiple channels can be changed.
iv. The Digital Output state can be set either by toggling the
individual check boxes or by numerical entry via the Drag
box dialog. The Drag box dialog uses a numerical value to
represent the Digital Outputs as a 16-bit word. This dialog
is also affected by the setting of the Single Bit control. If
enabled, the software will automatically convert the entered
numerical value to the closest value that represents a single
bit transition. If disabled, then multiple channels (bits) will
be set.
With either entry method the bit values will be displayed in
the Notebook Window. The drag box dialog will also update
the appropriate check boxes to match.
v. The simplest method to verify the functionality of the Digi-
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33
tal Outputs is to first enable the Single Bit control. Then,
use the check boxes to toggle the state of each output while
monitoring the output on the measuring device.
Important note: A reading above 2.4 Volts is
usually considered TTL HIGH, while a reading below 0.5 Volts is TTL LOW.
vi. Repeat for all Digital Outputs.
If any of the Digital Outputs fail the test, please contact HEKA
technical support for assistance.
(j) Checking the Digital Inputs: A device that can output TTL
HIGH (5 Volts) is required to test the functionality of the Digital
Inputs. The LIH 8+8 itself can provide this output either with
one of the D/A or Digital Output channels.
i. Assuming that a Digital Output is to be used. Connect the
Digital Output directly to the Digital Input to be tested.
Important note: Digital Inputs 0 to 2 are available on BNC connectors on the front panel and can
be easily accessed. All of the Digital Inputs are available on a DB-25 connector on the rear panel labeled
“DIGITAL IN.” To access these channels a breakout cable will have to be fabricated. Please refer to
Appendix I of this manual for a complete pin-out
description.
ii. Toggle the state of the Digital Output. For proper testing
verify that the input changes correctly for both HIGH and
LOW settings.
iii. Monitor the Digital Input state by viewing the check boxes
next to the text label DIG-IN. A quick reminder: an X
within the check box represents a TTL HIGH while a hollow
box represents a TTL LOW.
iv. Repeat the steps outlined above for each Digital Input chan-
nel.
If any of the Digital Inputs fail the test, please contact HEKA
technical support for assistance.
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34 Troubleshooting
6. Noisy A/D channel Input Signal: Most noise problems are usually caused by bad cabling or by other external devices. To resolve
these problems, please try the following:
(a) Verify that the LIH 8+8 and the host computer are plugged into
a common outlet strip. This will minimize power line induced
noise (sixty / fifty hertz signals) in the acquired data.
(b) Verify that the AC power is clean, and that the outlets are prop-
erly grounded. It is strongly advised that this task be handled
by a licensed professional.
(c) Verify that the BNC interconnect cables used are of high-quality
75 Ω cables, and that both the signal and ground connections
are continuous. This can be easily checked with either an ohm
meter (DMM) or a continuity tester.
(d) Disconnect any external connections to the LIH 8+8 and verify
that the noise is not shown on the computer display. If the noise
is eliminated, then start restoring the external connections, one
at a time, while observing the noise until the culprit is found.
Depending on the source of the noise it may require any number
of procedures to eliminate or reduce the noise. These procedures
may include rearranging ground connections, re-routing signal
cables and /or the removal of the noisy device. Devices that tend
to be noisy are monitors, computer power supplies, refrigerators,
and unshielded or poorly shielded equipment.
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6. Warranty and Support
6.1 Warranty
HEKA warrants to the first purchaser, for a period of one year from the date
of purchase (invoice date), that this HEKA Instrument (hereafter referred
to as the Product) will be free from defects in workmanship and materials,
and agrees that it will, at its option, either repair the defect or replace the
defective Product or part thereof at no charge to the purchaser for parts
and labor. The Product must be returned to HEKA properly packaged
with a written explanation of the problem, with transportation charges
prepaid and the shipment fully insured. The Customer is responsible for
all duties, taxes, and freight charges, if applicable. HEKA will return the
Product, postpaid and insured, in the most appropriate method as determined by HEKA. If a faster shipping service is desired by the customer,
any additional special delivery expenses must be paid by the customer.
This warranty does not apply to shipping damage . HEKA fully insures
all shipments. Any claims of damage upon receipt must be filed with the
carrier and HEKA immediately.
This warranty does not apply to any exterior appearance item of the Product which has been damaged or defaced, which has been subjected to misuse and abuse, abnormal service or handling, or which has been altered or
modified in design or construction.
This warranty does not apply to any inte rconnection cables supplied with
the Product.
This warranty does not apply if any unauthorized repairs, modifications or
alterations have been made to the Product, without written approval from
HEKA.
This warranty applies to software products only to the extent of maintenance release software to correct improper operation of the Product. Soft-
36 Warranty and Support
ware updates to increase the capabilities of the present Product are not to
be provided under the terms of this warranty. Updates will be available for
free download on www.heka.com.
No sales organizations, other than HEKA itself, are authorized to make
any warranties other than those described above, or to extend the duration
of any warranties beyond the time period described above on the behalf
of HEKA. If HEKA agrees to such a modification of this warranty, HEKA
will furnish a modified copy of this agreement which must be presented if
a claim is being made under these modified terms.
6.2 Limitation of Liability
Title, risk of loss or damage, and other incidents of ownership shall pass to
the customer upon due tender of goods.
HEKA shall not be liable for delays in delivery or failure to perform due
directly or indirectly to (i) causes beyond HEKAs reasonable control, (ii)
acts of God, acts (including failure to act) of any governmental authority
(de jure or de facto), wars (declared or undeclared), governmental priorities, port congestion, riots, terrorism, revolutions, fires, flo ods, sabotage,
nuclear incidents, earthquakes, storms, epidemics, or (iii) inabilities, due to
causes beyond HEKA’s reasonable control, to obtain necessary labor, materials, components, facilities, energy, fuel, transportation, governmental
authorizations or instructions, material or information required from the
customer.
Not withstanding any other provisions, the total limitations of HEKA,
including its subcontractors or suppliers, on any and all claims, whether in
contract, warranty, or otherwise, arising out of, connected with, or resulting
from the performance or non-performance of any agreement resulting here
from or from the manufacture, sale, delivery, resale, repair, replacement or
use of any equipment or the furnishing of any service, shall not exceed the
price allocable to the Product or service which gives rise to the claim. Any
such liability shall terminate upon the expiration of the warranty period
(one year from the shipping date of invoice), except as to title.
Not withstanding any other provisions, in no event, whether as a result of
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6.3 Obtaining Warranty Service 37
breach of contract, warranty, or otherwise, shall HEKA, or its subcontractors or suppliers, be liable for any special consequential, incidental, indirect
or exemplary damages, including, but not limited to, loss of profit or revenues, loss of use of the equipment or any associated equipment, cost of
capital, cost of substitute goods, facilities, s ervices or replacement power,
downtime costs or claims of Customers clients for such damages.
6.3 Obtaining Warranty Service
Warranty service of this Product can be obtained by returning the Product,
postpaid and insured, to HEKA. Prior authorization before shipping the
product is advised for the most expedient service.
6.4 Obtaining Out-of-Warranty Service
HEKA takes pride on its superb, long-standing repair and maintenance
service of its products. In fact, support is still available for the HEKA
produced EPC 7 - also known as List amplifier - which was introduced in
1982.
If a unit requires service after the warranty period has expired, please
contact HEKA’s service department for consultation. If return of the unit
is necessary, then shipping instructions will be provided. Once the unit has
been received and diagnosed, a repair quote will be supplied for approval.
Repairs are warranted for 90 days.
6.5 Technical Support
HEKA provides exceptional pre and post sales customer support from our
trained international sales representatives. Customer support is free of
charge for registered users of HEKA products.
Check the HEKA website, www.heka.com, for updated versions of driver
and/or application software. There are also many tutorial documents avail-
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38 Warranty and Support
able that may help resolve product-specific questions. If the problem is not
resolved, please supply the following information when corresponding:
Serial number of the LIH 8+8 interface
Operating system version
Driver software version number
Application software version number
Detailed information describing the problem
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7. Appendix I: Technical Data
7.1 DIGITAL I/O Connector
This is a 40-pin male connector that combines the digital input and output
lines. This connector is to be used to interface to other HEKA devices,
such as the EPC 8 or the TIB 14. For other purposes, the DIGITAL IN
and DIGITAL OUT Connectors should be used.
40 Appendix I: Technical Data
Figure 7.1: Digital I/O Connector
Pin number Signal Pin number Signal
1 IN-0 2 OUT-14
3 NO CONNECTION 4 OUT-15
5 IN-2 6 IN-10
7 IN-3 8 IN-11
9 IN-4 10 IN-12
11 IN-5 12 IN-13
13 IN-6 14 IN-14
15 IN-7 16 IN-9
17 IN-1 18 NO CONNECTION
19 GND 20 GND
21 GND 22 GND
23 NO CONNECTION 24 STROBE
25 OUT-0 26 OUT-8
27 OUT-1 28 OUT-9
29 OUT-2 30 OUT-10
31 OUT-3 32 OUT-11
33 OUT-4 34 OUT-12
35 OUT-5 36 OUT-13
37 OUT-6 38 IN-8
39 OUT-7 40 NO CONNECTION
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7.2 DIGITAL IN Connector 41
7.2 DIGITAL IN Connector
This is a DB-25 female connector that can be used to interface with the
Digital Input lines of the LIH 8+8.
Figure 7.2: Digital IN Connector
Pin number Signal Pin number Signal
1 IN-3 14 IN-4
2 IN-2 15 IN-5
3 GND 16 IN-6
4 GND 17 IN-7
5 GND 18 IN-8
6 GND 19 IN-9
7 GND 20 IN-10
8 GND 21 IN-11
9 GND 22 IN-12
10 GND 23 IN-13
11 GND 24 IN-14
12 IN-1 25 IN-15
13 IN-0
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42 Appendix I: Technical Data
7.3 DIGITAL OUT Connector
This is a DB-25 female connector that can be used to interface with the
Digital Output lines of the LIH 8+8.
Figure 7.3: Digital OUT Connector
Pin number Signal Pin number Signal
1 OUT-3 14 OUT-4
2 OUT-2 15 OUT-5
3 GND 16 OUT-6
4 GND 17 OUT-7
5 GND 18 OUT-8
6 GND 19 OUT-9
7 GND 20 OUT-10
8 GND 21 OUT-11
9 GND 22 OUT-12
10 GND 23 OUT-13
11 GND 24 OUT-14
12 OUT-1 25 OUT-15
13 OUT-0
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