Logitech Electronics 2000 MKII Series User manual

2000 MKII SERIES™
Timers
Model 2000S
User Guide!

Contents
Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety information for EU users . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Transformer connections (230V/115V AC selection) . . . . . . . . . . . . 5
Switches and connections
Run/Set Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Function (FUNC) Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
0-9, +/- Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Rear Panel Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Alarm Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mains Earth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Programming the instrument
Calculating a scaling factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Programming a new Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
—Setting the scaling factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
—Using the Offset Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
—Setting the Alarms — Model 2000AS only . . . . . . . . . . . . . . . . . .9
Reprogramming an Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Reset/Start/Stop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Output options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Diagrams
Front & rear panel layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Alarm Output Connections - Model 2000AS only . . . . . . . . . . . . . . 12
Additional information
Electromagnetic Precautions & Low Voltage Directive . . . . . . . . . 13
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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Specification
Display 6 decade and sign 7-segment red LED, 10mm high
Decimal point Programmable from front panel
Control inputs Start, Stop and Reset
Requires sink to 0V of 220Ωmaximum
Minimum duration of control signal is 0.3ms
Control Outputs Alarm 1 and Alarm 2 (Model 2000AS only)
Open Collector 200mA 60V maximum
DC Voltage 10V to 12V nominal unregulated @100mA
Scaling and Offset (+/-) 0.00001 to 999999, programmable via front panel, retained in non-
volatile memory
Connections Screw terminals on rear panel.
Power requirement
AC Factory set to 115V or 230V a.c. 50/60 Hz, loading 3VA.
DC Mains Timers can also be powered by providing 10V to 15V DC @
300mA max via the 10V terminal (refer to WARNING on page 11)
Alternatively, if specified at time of order, they can be configured to
operate from 24V DC only.
Temperature range
Operating 0°C to +50°C
Storage -20°C to +80°C
Dimensions 96 x 48 x 113mm (panel cut-out 92 x 43mm).
Weight 500g (standard mains supply version)
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General Description
The 2000S and 2000AS MKII SERIES™ Timers are versatile six decade (plus sign), fully programmable
digital timers with a large 10mm led display and based on the industry standard 80C51 series
architecture microprocessor.
They are built into half DIN (96 mm x 48 mm) panel mounting housings and can be supplied to
operate on 115V or 230V AC, or 24V DC power supplies (see Transformer connections on page 5).
The circuitry is protected against mains-borne interference offering excellent noise immunity for
maximum reliability.
The integral scaling factor allows conversion of the time period to engineering units such as mm or
litres.
Independent positioning of the decimal point in the resultant display gives maximum flexibility.
The 2000AS has the additionally facility of two independent alarm output settings.
2000 MKII SERIES™ Timers are available with several factory fitted options which must be specified
when ordering - see Specification section for details.
Additionally, Logitech will customise the programmed operating modes of these Timers to suit
specialised applications.
Many variations on the standard software have been developed - please contact the Sales Office if
this service is required.
Note:
Two versions of 2000 MKII SERIES™instruments are available - either with a full switch set accessible
externally on the front panel, or with only a single function switch (FUNC) accessible unless the
bezel and front panel are temporarily removed.
The following setting up instructions assume the front panel has been removed if using a single
switch version.
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Safety Information for EU Users
WARNING This instrument must be earthed when powered from a mains supply (see also Mains
Earth on page 8). Refer to the rating label for the pre-set voltage and ensure that the instrument
voltage corresponds to the intended supply voltage.
Important: The wires in the power lead fitted to mains instruments are coloured in accordance with
the following code:
Green and Yellow . . . . . . . . . . . . . Earth
Blue . . . . . . . . . . . . . . . . . . . . . . . Neutral
Brown . . . . . . . . . . . . . . . . . . . . . . Live
As the colours of the supply lead fitted to mains supply instruments may not correspond with the
coloured markings identifying the terminals in your plug, connections should be made as follows:
•Connect the green and yellow wire to the terminal marked with the letter E or identified with the "(earth) symbol.
• Connect the blue wire to the terminal marked with the letter N or coloured black.
• Connect the brown wire to the terminal marked with the letter L or coloured red.
The mains supply to this instrument must be protected with a 1 Amp fuse.
Transformer Connections
2000 MKII SERIES™instruments for use on mains power can operate on either a 230V or 115V
50/60Hz AC supply.
Instruments are factory pre-set to operate from the mains voltage specified at time of ordering.
If, for any reason, the user needs to change the mains operating voltage the following procedure
must be adhered to:
1. Disconnect the Mains Supply.
2. Gently prise off the front panel bezel surround and allow the front panel to fall forward
and out.
3. Remove the two nuts at the rear of the case, then push the instrument out through the
case front.
4. Pads which select the operating voltage are located on the underside of the printed
circuit board. The existing link(s) should be removed and new link(s) should be soldered
across the appropriate pads, and the instrument reassembled (one link is used for 230V
AC, two links are needed for 115V AC).

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Switches and Connections
RUN/SET Switch
This switch is located in the top right hand corner of the Front Panel.
When the instrument is in RUN mode the Timer will display the measured signal.
Pressing this switch once changes the Timer to the SET mode and activates the DP, 0–9 and the +
(polarity) switches (see the section Setting a Scaling Factor on page 8).
FUNCTION (FUNC) Switch
This is located directly below the RUN/SET switch and is used when it is required to observe or set
the programmable parameters (see Setting a Scaling Factor on page 8). Pressing the FUNC switch
steps through the parameters in the following sequence:
If the RUN/SET switch is in the RUN mode, and the instrument is displaying a measured value, a
single depression of the FUNC switch will step the display automatically through all the programmed
parameters at a pre-determined rate of approximately one per second. On completion of this cycle
the display will return to showing the measured value.
DP (Decimal Point) Switch
This is located under the FUNC switch and is used to set the position of the decimal point as
required. A single depression of the switch will move the decimal point one decade. Holding the
switch depressed will cause the point to move in decade steps from right to left at a pre-determined
rate.
This switch is only active when setting either the Scaling Factor or the Offset (the DP position in the
normal display)
0–9 Switch
Located under each decade, these switches are used to set the value of all programmable
parameters. Each depression increments the display one digit. Holding the switch depressed steps
the display through 0to 9at a pre-determined rate.
+/- Switch
Located at the lower left hand corner of the front panel, this switch selects negative values when
required by displaying a negative sign. No sign is displayed for + (positive) values.
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1.
SCALE
Scaling Factor
2.
OFFSET
3.
AL 1
Low Alarm
Model 2000AS only
4.
AL 2
High Alarm
Model 2000AS only

Rear Panel Terminals
Alarm Outputs
The LOW alarm (AL1) will be activated when the value shown on the display is equal to, or lower
than, the value programmed into memory. The HIGH alarm (AL2) operates on a value equal to, or
higher than, the programmed value.
The alarm outputs automatically reset when the value shown on the display returns to a “no alarm”
value.
The 2000AS can be supplied with a latching facility for the alarm outputs (factory fitted option that
must be requested at time of ordering). Resetting the outputs is then performed by grounding
terminal 6 (RST) on the Rear Panel.
Mains Earth
2000 MKII SERIES™ Timers are supplied with a three core mains cable. The earth lead from this cable
is connected to terminal 4 on the Rear Panel terminal block. For most applications this Earth terminal
should be linked to COMMON terminal 3 (0V) - see also Safety Information for EU Users on page 5
and Electromagnetic Precautions on page 13.
Exceptions to this are if the COMMON is connected to Earth elsewhere in the system (care must be
taken to avoid Earth loops); or it is found that the mains earth is of poor quality; or when it is essential
that the signal input or the analogue output of the instrument is floating.
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1
AL1
LOW Alarm (Open Collector 200mA 60V max.) Model 2000AS only
2
AL2
HIGH Alarm (Open Collector 200mA 60V max.) Model 2000AS only
3
0V
Common
4
Mains Earth
5
10V
+10V d.c. (unregulated) @ 80mA
6
RST
Reset Alarm (if Latching Alarm is specified)
7
STP
Stop
8
GO
Start
9
0V
Common
10
Not used
11
0V
Common
12
Not used
"

Programming the Instrument
Calculating a Scaling Factor
The scaling factor in the 2000S or 2000AS is set as the number of milliseconds per displayed unit -
ignoring the decimal point in the display.
For example, if for each fifteen (15) milliseconds of time you want the display to increment once, the
scaling factor should be set to fifteen (15). Normally the scaling factor will be set to 1 to display
milliseconds, 1000 to display seconds, 60,000 to display minutes or 360,000 to display tenths of
hours.
The function is where Dis the displayed value, xis the total number of milliseconds and sis the
scaling factor.
Programming a New Instrument
Setting a Scaling Factor
Unless requested otherwise, instruments are normally supplied from the factory with all settings
programmed to zero. Since operation of the unit without a preset scaling factor is not possible, on
power up for the first time the display will show SET .... SCALE ....0 (....signifies a one
second delay before the display changes).
The digits can be changed by pressing the buttons beneath each decade. The position of the
decimal point is changed by pressing the bottom right hand button to step to the position required.
A negative scaling factor, which causes the display to count down — as used for timeout
applications — can be set by pressing the leftmost switch (+/-). When the required values have
been programmed in, the instrument is put into the RUN mode by pressing the RUN/SET switch
once.
After a scaling factor has been set, and the instrument has been put into RUN mode, the settings
are retained in memory upon power down. When power is reinstated the instrument will
immediately be ready for operation without need for a reset command.
Using the OFFSET facility (setting the decimal point in the display)
After setting the scaling factor, if the function button FUNC is pressed the display will show
OFFSET for 1 second followed by the value contained in memory.
The digits and decimal point position are altered as above and the position set for the decimal
point is the position of the decimal point in the final display. If a non-zero offset value is entered
then this value will be loaded into the display before timing commences.
This feature is most useful for timeout applications when a negative scaling factor is entered
which causes the display to count down. It may also be used whenever it is required to add or
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D x s=

subtract a constant from the timed interval to account for mechanical delays in other parts of the
system.
Setting the ALARMS - Model 2000AS only
After setting the OFFSET, if the function button FUNC is pressed once again the display will show
AL 1 for 1 second followed by the ALARM 1 value contained in memory. The digits are set as
before.
Pressing the FUNC button once again causes the display to change to AL 2 for 1 second and
then show the ALARM 2 value contained in memory.
In operation, when the Timer display reaches the set values then the corresponding output AL1 or
AL2 on the rear terminal block will become active.
Reprogramming an Instrument
To access the SET mode from the RUN mode when a scaling factor has already been set press the
RUN/SET button once. The display will show SET …. SCALE .... and then show the scaling
factor which is currently contained in memory. The digits can then be changed by pressing the
buttons beneath each decade as for an un-programmed instrument.
Operation
(If the unit is in SET mode, the RUN/SET button should be pressed once to toggle to the RUN mode).
The display will indicate RUN for 1 second and will then show zero until the count starts.
NOTE: Entering the SET mode causes the time period to be reset.
The display will be incremented or decremented whenever the number of milliseconds, as set for the
scaling factor, are counted.
The display can be reset to zero (0), or to the value as entered for OFFSET, at any time by
connecting the RESET (RST) input on the back panel to 0V (see Fig. 2). Alternatively, if the RESET
input is permanently linked to 0v then the FUNC button on the front panel can be used as a reset.
The instrument will increment or decrement the displayed time until it has filled all the decades. After
displaying 999999 or -999999 the next time interval will cause the display to read High. If this
situation arises the Timer must be reset before operation can continue.
Reset/Start/Stop
Timing is enabled upon switch-on or after a RESET (RST) signal has been applied. The Timer can
be halted by connecting the STOP (STP) input to 0V and restarted by momentarily connecting the
START (GO) input to 0V.
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Output options
DC Analogue: 0–5V*, 0–20mA, and 4–20mA outputs
When Timers are fitted with any of these options the output is available via a Red (+ve) and a Black (-
ve) socket on the Rear Panel.
The outputs are proportional to the display reading and not the input signal.
With the Timer in the SET mode, each depression of the FUNC switch will step through the
parameters in the following sequence:
When using the outputs, values should be set in parameters 5 and 6 as appropriate.
The REF will probably be zero but it can be set to the lowest value normally expected.
The Full Scale (FS) value will depend on the Analogue Output Module specified when the instrument
is ordered, the application and the range of display readings expected.
Note: The outputs are not affected when the Tachometer is in the RUN mode and the Function
(FUNC) switch is used to observe the parameters 1 to 6.
* The maximum DC output voltage available with this option is +5V.
WARNING
2000 MKII SERIES™instruments cannot normally be operated on an external DC supply when an
optional Analogue Output Module is fitted. If it is necessary that an external DC supply is used, then
the facility to do so should be requested when discussing the specification of the instrument with our
Sales Office and it must be specified on the purchase order.
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1.
SCALE
2.
OFFSET
3.
AL 1
(Low Alarm)
4.
AL 2
(High Alarm)
5.
REF
(0V)
(0V)
(0mA)
(4mA)
6.
F.S.
(1V)
(5V)
(20mA)
(20mA)

Diagrams
Front Panel Layout
Note: On instruments with the SINGLE switch set option
only the FUNC switch is accessible unless the bezel and front panel are removed
Rear panel layout
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2000S MKII
2000AS MKII

Alarm Output Connections - Model 2000AS Only
Alarm Connections with External Power Supply - Model 2000AS Only
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+10V @ 100mA
2000AS Timer
Terminals
5
1 (AL1)
2 (AL2)
Relay
or
2000AS Timer Terminals
1 (AL1)
or
2 (AL2)
3, 9, or 11
Relay
+Ve -Ve
Power
Supply

Additional Information
Electromagnetic Precautions
Logitech have designed in a great deal of noise immunity into the product in accordance with
EN5001-2 and EN5002-2 (radiated emissions, conducted emissions, ESD, radiated susceptibility and
fast burst transient testing)
However it is still vital to use good EMC (Electromagnetic Compatibility) techniques on installation of
both this and other associated electronic equipment and sensors in order to ensure reliable
operation.
It is important to note that if used with systems that radiate high levels of harmonic noise such as DC
Drives, AC Inverters and Servo Drives then the levels of imposed interference can greatly exceed
that of the European Standards.
In such cases it is important to ensure that mains leads are routed as far as possible from all cables
carrying power to such equipment and that the supply should, if viable, be taken from a clean source.
Where this is not possible, it is advisable to use a good quality mains filter mounted as close to the
instrument as possible, ensuring that the cable between the filter and the instrument is kept separate
from any cables carrying high levels of current or any fast switching transients.
All signal connections to the instrument should be made using screened lead with the screen
connected to mains earth at one end only.
Wherever possible, it is advisable to connect the 0V terminal to mains earth, unless it is found that
the mains earth is of poor quality or when it is essential that the signal input is floating — see Mains
Earth on page 8.
Low Voltage Directive
It is essential that the mains supply to the instrument is fused externally to no more than 1A and that
the cabling supplying power to the instrument is rated for at least 3A.
Low voltage signal cables should not be run in the same conduit or twisted or tied to cables carrying
voltages in excess of 50V (AC or DC).
If the instrument is not installed fully in accordance with the instructions in this User Guide it may not
comply with the requirements of the Low Voltage Directive.
Warranty
2000S MKII SERIES™Timers carry a two year warranty that is only valid where there is no damage
caused by accident, negligence, misapplication, or repairs/modifications attempted by unauthorised
personnel. The warranty only extends to the original user.
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Copyright © Logitech Electronics Limited
1994 to 2017
Document No: 2000S-MKII_hb v3.0 August 2017
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Design and Manufacture of Electronic Systems and Instrumentation. Supply of Sensors and Transducers
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