Stopwatch for Single Events
or Accumulated Events
4-20 mA Current Transmitter
Modbus or Laurel ASCII Protocol Serial I/O Transmitter
Resolution
to 0.2 µs. Duration to 999,999 hrs.
DIN Rail mounted, digitally programmable.
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Features
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Selectable Modbus or Laurel ASCII
protocol.
- Modbus
RTU or ASCII modes, 2-wire connection,
up to 247 digital addresses.
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Times single event time or accumulated
time of all events.
- Timing
resolution to
0.2 µs.
-
Timing duration to 999,999 hrs.
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Selectable H, M or S decimal format.
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Selectable HH.MM.SS clock format.
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Inputs from NPN or PNP proximity
switches, contact closures, digital
logic, or magnetic pickups down to 12
mV.
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Triggers on positive or negative pulse
edges.
- Isolated
5V, 10V or 15V dc excitation output to power
transducers.
- DIN rail
mount package only 22.5 mm thick.
-
Detachable screw clamp plug connectors.
- Easy
setup using PC-based
Instrument Setup Software.
- Optional
dual solid state relays for alarm or
control.
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Description
 Stopwatch
Operation
The
Laureate TM Series serial output stopwatch
transmitter performs all of the
functions of the Laureate panel mount
stopwatch, except for the display. The
data retrieved via serial commands can
be the time of individual events (Item
#1) which produce start and stop pulses,
or accumulated time of multiple events
(Item #2). The highest resolution is 0.2
µs, making the transmitter ideal for
fast events. The longest timing interval
is 999,999 hrs. For long events, the
output is updated continuously during
timing. There are two primary timing
modes:
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A-A Stopwatch Mode.
Time is measured between a start
pulse and a stop pulse, both on
Channel A, from either the positive
or negative edges.
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A-B Stopwatch Mode.
Time is
measured between a start pulse on
Channel A (positive or negative
edge) and a stop pulse on Channel B
(positive or negative edge). This
mode allows inputs from different
sources. In addition, the A and B
inputs can be tied together to start
the stopwatch
with one polarity and stop it with
the other polarity.
Event
time (Item #1)
is measured by counting 5.5 MHz clock
pulses from a calibrated quartz crystal.
The
stopwatch output is updated during
timing at a rate controlled by a gate
time, up to 25/sec. Time is reset to
zero when the next start pulse occurs.
Accumulated time from multiple events up
to 999,999 hours (Item #2) can also be
tracked.
 Universal
Signal Conditioner
The dual-channel signal conditioner used
for pulse detection accepts inputs from
proximity switches with PNP or NPN
output, TTL or CMOS logic, magnetic
pickups, contact closures, and other
signals from 12 mV to 250 Vac.
Jumper
selections provide optimum operation for
different sensor types and noise
conditions. A built-in isolated 5V, 10V
or 15V dc excitation supply can power
proximity switches and other sensors,
and eliminate the need for an external
power supply.
Serial Data I/O & Programming
Laureate TM
Series transmitters send data as a
serial digital signal. RS485 or RS232
signal levels are jumper selectable and
can each be associated with either the
Modbus protocol or Laurel’s simpler
Laurel ASCII protocol.
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Modbus protocol operation is
fully compliant with the Modbus Over
Serial Line Specification V1.0
(2002) for 2-wire, half-duplex
connection. This includes RTU or
ASCII modes, addressing of up to 32
devices per RS485 line without a
repeater, and up to 247 digital
addresses. Modbus operation allows
devices by different manufacturers
to be connected in parallel and be
addressed using the same protocol.
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Laurel’s Laurel ASCII protocol
allows up to 31 Laureate devices to
be addressed on the same RS485 data
line. It is simpler than the Modbus
protocol and is recommended when all
devices are Laureates. It also
allows use of Laurel’s datalogging
software.
Transmitter programming is via the
unit's three-terminal serial port using
Laurel's PC-based
Instrument
Setup Software. This software can be
downloaded from this website at no
charge. The required transmitter-to-PC
interface cable is available from Laurel
(P/N CBL03). Laurel's serial output
transmitters and meters can also be part
of PC-based data logging systems using
Laurel's
Datalogging Software, which operates
under the Laurel ASCII Protocol. A
single software command switches between
the Modbus and Laurel ASCII Protocols.
Transmitter Options
Options
include dual solid state relays for
local alarm or control and an isolated
4-20 mA or 10V (selectable) analog
output, effectively providing a
linearized analog transmitter output
that tracks the reading that would be
transmitted digitally. The analog output
provides 12-bit (4096 step) resolution
of the output span and is ultra-linear
to within one bit. Its accuracy is
±0.05% of span for all signal types,
except for AC rms, where accuracy is
±0.1%. Output isolation from signal and
power grounds is provided by a separate
on-board power supply, which can drive
20 mA into a 500 ohm load for 10V
compliance. Output isolation eliminates
problems caused by ground loops.
DIN Rail Mounting
Laureate
transmitters are housed in a 35 mm DIN
rail case that is only 22.5 mm (0.89")
thick. Signal connections are via
detachable screw clamp plug connectors.
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Specifications
Laureate
Serial I/O Transmitter, Stopwatch Input
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Pulse Input |
Types
Ch A Frequency, Max
Ch B Frequency, Max
Signal Ground
Minimum Signal
Maximum Signal
Maximum Frequency
Contact Debounce
Time Base Accuracy
Span Tempco
Long-term Drift |
AC, pulses from
NPN, PNP transistors, contact closures,
magnetic pickups.
1 MHz.
250 kHz.
Common ground for channels A & B.
Nine ranges from (-12 to +12 mV) to (+1.25
to +2.1V).
250 Vac
1 MHz, 30 kHz, 250 Hz (selectable).
0, 3, 50 ms (selectable).
Quartz crystal calibrated to ±2 ppm.
±1 ppm/°C (typical)
±5 ppm/year |
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Stopwatch
Operation |
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Timing Modes:
With CH A only
With CH A tied to CH B
With CH A and CH B
Timing Interval
Timing Resolution
Selectable Decimal Time
Selectable Clock Time
Output Update
Gate Time |
+ to + edge, or - to - edge.
+ to - edge, or - to + edge.
+ edge of A to + edge of B, + edge of A to -
edge of B,
- edge to A to - edge of B, - edge of A to -
edge of B
1 µs to 999,999 hrs
0.2 µs to 1 hr
999999 H, M or S format with decimal point
HH.MM.SS format
Gate time + 30 ms
Programmable from 10 ms to 199.99 s |
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Serial I/O (standard) |
Signal levels
Data Rates
Output Isolation
Serial Protocols
Devices on RS-485 Line
Modbus Addresses
Modbus Modes
Modbus Compliance |
RS485 (default) or RS232 (jumper selectable)
300, 600, 1200, 2400, 4800, 9600, 19200 baud
250V rms working, 2.3 kV rms per 1 min test.
Modbus RTU, Modbus ASCII, Laurel ASCII (selectable)
32 max without a repeater.
247 max
RTU or ASCII, 2-wire.
Modbus over Serial Line Specification V1.0 (2002). |
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Transducer Excitation Output (standard) |
Jumper Selection 1
Jumper Selection 2
Jumper Selection 3 |
10V @ 60 mA, isolated to 50V from signal ground
5V @ 50 mA, isolated to 50V from signal ground
15V @ 60 mA, non-isolated |
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Dual Relay Output (optional) |
Relay Type
Load rating |
Two solid state relays, SPST, normally open,
Form A
120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance. |
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Analog Output (optional) |
Output Levels
Compliance, 4-20 mA
Compliance, 0-10V
Output Resolution
Output Accuracy
Output Isolation |
0-20 mA, 4-20 mA or 0-10 Vdc (selectable)
10V ( 0-500 ohm load )
2 mA ( 5 kOhm load )
12 bits (4,096 steps)
±0.05% of output span
250V rms working, 2.3 kV rms per 1 minute test |
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Power Input |
Standard power
Low power option
Frequency
Power Isolation |
95-240V AC ±10% or 90-300V DC
12-30V AC or 10-48V DC
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test. |
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Mechanical |
Case Dimensions
Case Mounting
Electrical Connections |
120 x 101 x 22.5
mm
35 mm rail per DIN EN 50022
Detachable screw clamp plug connectors |
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Environmental |
Operating
Temperature
Storage Temperature
Relative Humidity |
0°C to 70°C
-40°C to 85°C
95% at 40°C, non-condensing |
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Typical Applications |
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Stopwatch Mode |
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The
stopwatch mode is used to time single events
between start and stop pulses on the same
channel. Duration of a single wave shape can
be measured by tying the A and B channels
together. |
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Timing Process Dynamics |
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The start
and stop pulses used for timing can be
generated by the dual relays in a Laureate
panel meter, counter, or transmitter. For
instance, the start and stop pulse edges can
be created as temperature passes two alarm
setpoints, or as temperature cycles in a
hysteresis control mode. |
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Replacing an Oscilloscope with a
Laureate Meter or Transmitter |
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An
oscilloscope is great for viewing and timing
pulses in a lab. However, in fixed
installations where digital timing accuracy
and control outputs are required, a low-cost
Laureate time interval meter or transmitter
will be the instrument of choice. Resolution
to 0.2 µs is feasible. |
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Instrumenting a Pulsed Laser System |
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Some
of the many possibilities in
instrumenting a pulsed laser system
with Laureate dual-channel counters
and transmitters: elapsed time,
number of pulses, pulse width, pulse
separation, duty cycle, and pulse
rep rate.
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Pinout
Laureate Serial Output Transmitter
Stopwatch for Single Events or Accumulated Events
(shown with optional analog output
and dual relay
output)
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Transmitter
Powering a Single Sensor
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Transmitter
Powering Two Sensors |
Transmitter with Active or Passive Sensors |
Ordering
Guide
Modbus or Laurel ASCII
Protocol Serial I/O Transmitters,
Stopwatch Input
Create a model
number in this format: TM6020FR. This
example calls out a Modbus output
transmitter, Standard main board, 95-240 Vac
power, isolated dual solid state relays, no
analog output, and dual channel pulse input
signal conditioner. Includes plug-in screw
clamp connectors.
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Transmitter
Type |
TM Laureate Transmitter, Modbus or
Laurel protocol. |
$210 |
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Main
Board |
6 Standard Main Board. |
NC |
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Power |
0 Isolated 95-240 Vac & 90-300 Vdc
1 Isolated 12-30 Vac & 10-48 Vdc. |
NC
$30 |
Setpoint
Output |
0 None.
2 Isolated Dual Solid State Relays. |
NC
$30 |
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Analog Output |
0 None.
1 4-20 mA or 0-10V analog output. |
NC
$25 |
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Input
Type |
FR Dual-Channel Pulse Input.
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NC |
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Accessories |
CBL03 RS-232 cable, TM to computer.
CBL02 USB to RS-232 cable adapter. |
$19
$39 |
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Order from
distributors for shipment to USA or Canada. |
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Order online for
international shipment. |
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