Slim Nudl - Narrow Universal Data Logger

12 bit accuracy             Large picture 
Variable logging rate
5 analogue inputs
2 digital inputs
1 digital output
Remote re-programming
Remote access to data
SMS alarm and status messaging

Approx 340mm overall length, 43mm diameter

Lower Data Acquisition Costs
The Slim Nudl is a revolutionary data logger that can significantly reduce the costs involved with many environmental data acquisition activities, through its built in ability to transmit data or alarms and be remotely configured or controlled.
Consisting of; a data logger, a basic PLC, an SMS alarm sender and a time clock all built into a single unit the Slim Nudl is ideal for remote applications where the cost of regular trips to the field to download devices can be overcome with the simple addition of a GSM, GPRS or CDMA modem.

In addition to the units ability to be remotely downloaded, configured and controlled, the unit includes time saving features such as; variable logging rates,
SMS alarm, status and control capabilities, a complete calendar with daylight savings capabilities and more…

Flexibility
5 analog inputs (3 x 4-20mA, 2 x 0-2.5V) and
1 digital input  allow for the connection of a multitude of sensor/input types. Sensors can be self powered or they can utilise the switched supply available from the loggers internal battery or external power supply connection.
A wide range of sensors is available, such as water level sensors with our unique breathable sensor termination/connection.

IP 67 Circular Connector
IP67 Breathable Membrane
             (for atmospheric pressure equalisation)
Unique IP67 water level sensor connector

Configure the unit,
download data and receive alarms on your PC, either
by direct connection or via
a GSM or GPRS modem connection

Optional GSM or GPRS modem in a weatherproof
enclosure including battery pack

Receive status and alarm signals or control the logger via SMS to/from your mobile phone

Control pumps, valves, warning lights, sirens or signs with the units digital output…or…vary the units logging rate with a simple switch connected to the units digital input

Specifications

Enclosure
Body: Fabricated from Black Acetyl (Delrin)
Connectors: IP67/68 multipin circular connectors
Mounting: 3mm diameter holes provided at communications end for hanging as appropriate

Weight: Approx. 325 grams with battery pa ck.
Battery pac approx. 40grams.
Environmental: -20 to +50°C, designed to meet IP67 - suitable for short term immersion to 3m
Battery Access: Via battery plug

Nudl Board

Analog Inputs:
• 5 analog inputs with 12 bit resolution.
• Each input ca n be programmed as appropriate with
minimum and maximum values and units of measure.
• Additional input signal processing via add on modules.
• Each input has a discriminator capable of transforming the
analog value into a digital value. The discriminator can
be set to operate as a simple switch or a window. The
digital value can be set to be true if the input is above or
below the switch threshold or within or outside the window.
• Hysteresis is used to prevent spurious switching a round the
thresholds.
• Programmable delay from 0 to 255 seconds for each input

Digital Ouputs:
• One open collector MOSFET
• The switches can handle loads of 100mA with voltages up
to 25Volts.

Logic Functions:
• 8 logic functions each with 4 inputs and 4 AND/OR arrays.
• Logic function output can be inverted.
• Logic function inputs c an be derived from digital inputs,
digital variables, analogue inputs or timeclocks.

Delay Functions:
• 4 delay functions each capable of generating one of 3 types
of output: Delayed turn on, Fixed width output or Input
stretching.
• Delay function can be programmed to operate from either
the rising or falling edge of the input.
• Logic function inputs can be derived from digital inputs,
digital variables, analog inputs or timeclocks.
• Delay times from 1 to 255 seconds.

Time clocks:
• 8 separate time/action events during the day.
• 4 daily schedules.
• 6 weekly sc hedules with public holiday override. These
schedules can be used by other functions.
• 8 public holidays.

Logging:
• 128kbytes of logging memory.
• Each analog input can be selectively logged.
• All log entries are time stamped with a resolution of 1
second.
• All alarms are logged.
• All re-program events are logge d.
• All changes to the input limits are logged together with the
users phone number.
• Logging intervals selectable from 5 minutes to 1 hour
synchronised to cardinal times with optional capability to
log at rates from 5 seconds to 255 seconds interval in 1
second steps.
• Logging rate can be controlled by any digital input, digital
variable, analogue input or timeclock.
• Capability to output logged data as a csv style frame each
time a logged sample is stored.

Modem Power Control:
• Capability of powering the modem off.
• Capability of waking the modem up on a regular schedule
to allow for remote access.
• Capability of waking the modem up to send a SMS
message.

Alarms:
• Alarms are reported by SMS messages.
• 8 separate phone numbers.
• Phone numbers can be selectively enabled by weekly schedules.
• Alarm escalation programmable on each alarm.
Disabled phone numbers are automatically excluded from the escalation.
• Programmable delay time for each alarm.
• Alarm inputs can be derived from digital inputs, digital
variables, analogue inputs or timeclocks.
• Optional daily alarm limit preventing excessive SMS phone
bills.
• User programmable number of retries.
• User programmable time between retries.

Digital Variable:
• 32 digital variables accept outputs from the internal functions.
• All digital variables can be used as inputs to any function.

Sensor Power Control:
• MOSFET switc hed power supply to exte rna l sensors.
• Programmable sensor power on delay from 30ms up to 160secs.
• Programmable analogue sample rate from once/sec down to
1 sample every 18 hours.

Counter Functions:
• 2 16 bit counters.
• Counter inputs c an be derived from digital inputs, digital
variables, analogue inputs or timeclocks.
• Alarm generation capability if count exceeds a user defined
limit.
• Counters can be preset to any value .
• Counters can be cleared by any digital input, digital variable, analog input or timeclock.

Digital Inputs
• 2 digital inputs.
• Input accepts a switch closure to ground with an external
pullup resistor.
• 32 bit counter associated with e ach input. The counter
counts the positive transitions on an input.

SMS Command Capability
• Remote interrogation of analogue inputs
         with the values being returned in engineering units.
• Remote interrogation of analogue input limits.
• Remote interrogation of digital inputs and outputs.
• Remote interrogation of phone numbers.
• Can c hange phone numbers.
• Can c hange ana logue input limits.
• Can disable or e nable a ll alarms.
• Can remotely turn on or off any digital output.
• Can remotely acknowledge a n alarm a nd cancel escalation.
• Can c hange the holida y list.
• Acknowledgement of all SMS messages.

Communication:
• Standard RS232 communications at 9600baud.
• SMS commands using a GSM modem.
• GPRS connection supported.

Power

Power Supply: 3.6VDC to 16VDC @ 25uA nominal.
Current consumption varies depending on the configuraton
from 5uA up to about 50uA (this does not include sensor power consumption)

Battery: Internal Battery Options Available

Power Control of Analog Sensors:
Switched incoming supply via MOSFET, maximum load curre nt
of 100mA, ma ximum Series resista nce of 10 ohm