Observator Instruments OMC-048 User manual
Users' Hardware Manual | OMC-048
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V1.4
Document history
The Observator range is in continuous development and so specifications may be subject to change
without prior notice. When in doubt about the accuracy of this document, contact the Observator Group.
Revision history
Version
Date
Amendments
Company, position
2020-7-1
Initial document creation
Observator, TDC
2020-8-4
Pre- release
Observator, TDC
1.0
2020-11-16
First Release
Observator, TDC
1.1
2021-12
Observator, TDC
1.2
2022-4
Revision to Hardware V1.03 only for review
Observator
1.3
2022-6
Release
Observator
1.4
2022-06-20
Release, minor textual corrections
Observator
Users' Hardware Manual | OMC-048
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V1.4
Preface
This manual is intended for the user of the OMC-048 Scriptable Data logger.
You will find all information related to the hardware v1.03 (released in June 2022).
Detailed and up to date information concerning drivers and firmware is available in the OMC-048
Configuration Manual, which is available for download on the Observator.com website.
It does not include explanation of the Python scripting language. It assumes Observator Instruments or a
third party supplies the Python application for your logger.
If you are interested in scripting the logger yourself, we kindly refer to the OMC-048 Webmanual, which is
available on our Observator.com website.
Users' Hardware Manual | OMC-048
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V1.4
For correct functioning of this system the OMC-048 Data logger and
connected sensors must be installed and commissioned according
installation instructions.
Note the correct power supply voltage:
This a 12-24VDC system
Use external fuse!
After end of life dispose this product according local regulations or
return to manufacturer.
Users' Hardware Manual | OMC-048
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V1.4
What’s in the box
1
OMC-048 Scriptable Data Logger
2
Micro SD card 32GB (installed in the logger
3
Backup battery 3V coin cell (installed in logger)
Type: BR2032
4
USB cable C-type
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V1.4
Table of contents
1Introduction......................................................................................................................8
1.1 Hardware revision 1.03 ..................................................................................................................8
2First use............................................................................................................................8
2.1 Requirements ................................................................................................................................8
2.2 Installation SIM card & activation backup battery............................................................................9
3I/O Connections .............................................................................................................10
3.1 Pinning ........................................................................................................................................10
3.2 Ground connections.....................................................................................................................12
3.3 USB connection...........................................................................................................................12
Appendix A: Specifications:...................................................................................................13
Appendix B: Declaration of Conformity.................................................................................14
Users' Hardware Manual | OMC-048
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V1.4
Users' Hardware Manual | OMC-048
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V1.4
1 Introduction
This versatile data logger is the successor of the successful OMC-045-3 data logger. It has a large
number of inputs and outputs, including SDI-12, ModBus and analog. The OMC-048 uses the latest
technology and includes a powerful processor as well as a state-of-the-art LTE ‘world wide’ modem for
connecting to the cellular network.
Thanks to the advanced processor and the availability of a large collection of input and output drivers, it is
possible to write your own programs (Python scripts) for maximum flexibility. For common applications,
scripts will be available for you to download, so most users will be able to use the logger without any
programming.
1.1 Hardware revision 1.03
This manual assumes you have the updated hardware 1.03.
Main differences with previous version:
1. 1 switchable 12VDC power output has been converted to 5VDC (Available outputs are now: 3 x 12VDC
and 1 x 5VDC).
2. The reset button is updated to a software controlled reset, button on previous version resulted in a hard
reset.
3. Internal ADC for (logger) power supply voltage monitoring.
4. Vref output changed from 2.5V to 5V.
2 First use
2.1 Requirements
For setting up your OMC-048 Scriptable Data Logger you will require the following:
1. USB –C cable (included)
2. PC / laptop
3. Terminal program
4. External power supply *
5. Cellular antenna (suitable for the band you will use)
6. Sensors (optional)
7. Phillips screwdriver
8. 2mm flat screwdriver
* Configuration & firmware updates are possible with USB power, external power is required for starting
the application!
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V1.4
2.2 Installation SIM card & activation backup battery
When you receive your OMC-048 Scriptable Data Logger, it might or might not already have been
configured by Observator Instruments. For the following steps we assume it has not.
1. Use a suitable Philips screwdriver to remove the 2 screws of the right cover.
2. Remove the right cover
3. Remove plastic strip from coin cell (if not already removed)
4. Place Nano SIM card (without pin code, check and disable with a phone).
5. Reinstall cover
6. Tighten the 2 screws.
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V1.4
3 I/O Connections
3.1 Pinning
Connector
Description
Remarks
Power supply input
12- 24 VDC
Note: Power input is
protected but not internally
fused.
Use an external fuse
Switchable power supply
3 x12VDC, 1x 5VDC
Max 200mA nominal per
output
Peak power 500mA (1 port!)
For sensor use.
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V1.4
Latching Relay outputs
Max 1A @ 30V
Note: relays retain their last
position after power down.
Analogue inputs
0-24VDC
0-5VDC
2.5V reference voltage
output
0-24mA input (4 pce)
NMEA input
Optical isolated
Wind sensors
Meteolink
NMEA type sensors.
SDI-12 input
Serial inputs (4 ports)
RS-232
RS-422
RS-485
Each port can be selected
for either type.
Digital input
Contact input (2 pcs)
Antenna connection for
GPRS/UMTS/LTE
(2.5G/3G/4G).
USB (type C) connector
Status LED
Reset Button
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V1.4
3.2 Ground connections
- The negative input power connection (terminal 1) is filtered and therefore not equal to ground!
- The analogue ground is decoupled so not equal to ground!
- The SDI-12 ground is dedicated to the SDI 12 input.
3.3 USB connection
The logger can be powered via the USB connection for configuration & firmware updates.
However, your USB port might not supply enough power when sensors are connected and / or the modem
is active.
Therefore the logger application will not start when no external power is present!
The OMC-048 Scriptable Data Logger will create 2 connections with your PC:
1. Mass Storage device
2. USB Serial device (Com port)
The OMC-048 will check for a USB connection every 10s.
External power (12-24VDC) is required for running the logger application!
Basic ground connection rule:
Use the ground (GND) and signal connections within same section (= white lined box) and
you will be fine!
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V1.4
Appendix A: Specifications:
Power
•Supply voltage nominal 12 Vdc to 24 Vdc (min 9Vdc, max 32Vdc).
•Power consumption in sleep mode: <1 mA at 12 V.
•Power consumption in active mode: <30 mA at 12 V (excluding modem and power outputs).
•Peak power consumption (including modem): 250 mA at 12 V (excluding power outputs).
•Max power output per switched power output: 0.5 A peak (one output), 200 mA continuously (4
outputs each).
Note: Switched power output is maximized to 12V for supply voltages above 12V.
Environmental
•Temperature: -25 ... +70 °C.
•Humidity: 10 - 90% RH, non-condensing.
•Enclosure: IP40.
Dimensions
•Width x depth x height: 177 x 105,5 x 50 mm.
•Weight: 410 g.
•Package dimensions: t.b.d.
•Package weight: t.b.d.
SIM & SD cards
•Nano SIM.
•Micro SD (Max 32GB)
Users' Hardware Manual | OMC-048
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V1.4
Appendix B: Declaration of Conformity
Users' Hardware Manual | OMC-048
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V1.4
© Copyright –Observator Group
Since 1924 Observator has evolved to be a trend-setting developer and supplier in a wide variety of
industries. Originating from the Netherlands, Observator has grown into an internationally oriented
company with a worldwide distribution network and offices in Australia, Germany, the Netherlands,
Singapore and the United Kingdom.
www.observator.com
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