Signal Conditioners, Temperature Transmitters and Controllers
Modbus RTU, Modbus TCP, Canbus, PLC's and Hmi's.
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  • Modbus Data logger.

    • Modbus Data Logger.
    • DAT9011USB Thumb Drive Slot.
    • DAT9011DL SD RAM.
    • 1 Universal Input T/C's, RTD's, mA, Volts, Pot, Resistance.
    • 1 Analog 4-20mA, 0-10Volts Input.
    • 2 x Analog 4-20mA Outputs.
    • 2 Digital Inputs.
    • 2 SPDT Relay Outputs.
    • Modbus RS485 Master.
    • Modbus RS485, RS232 Slave.
    • Modbus Ethernet 10 Base-T Modbus TCP.

Modbus Data Logger DAT9011DL

General Description Modbus Data Logger

The Modbus Data Logger DAT9011DL and DAT9011USB are Data Acquisition units that can store registers that are on a Modbus RTU network. The DAT9011DL stores registers to an SD Memory card and the DAT9011USB stores to a USB Flash drive.
The DAT9011DL and DAT9011USB also have analog inputs such as Thermocouples, 4-20mA, volts, RTD's, Resistance, Potentiometers and 2 4-20mA outputs. They also have 2 Digital inputs that can work up to 300Hz and 2 relay outputs.
The DAT9011DL and DAT9011USB have built in Modbus master and Modbus slave ports, and can work on RS485, RS232 and Ethernet Communication.
Simply connect to the DAT9011 DL or DAT9011USB Modbus Data Logger with an Ethernet cable and the Free Dev9 development software and set up the logger to collect information on the MODBUS network or log the internal analog and digital input channels. Various function blocks are available to condition the parameters such as Communication, which handles the reading and writing of the registers from external devices. Also maths function blocks that can add, subtract, multiply, divide, scale, and average. Other function blocks are move, shift, trip, alarms and timers.
Other Datexel modules can be used in conjunction with the DAT9011DL and DAT9011USB such as the DAT9550 which is a Remote Display unit that can display pages of different parameters and the DAT3000 range of Analog and Digital inputs and outputs.
See the Download page for many Application Notes, User Guides, and the Free Dev9 software development tool.

Registers on the Modbus Network.
mV, Volts, RTD, Resistance, Pots, mA, T/Cs.
Digital Input/Output.
Current 4-20mA, 0-20mA.
2 Relays.
RS232, RS485, Ethernet 10Base-T, Modbus TCP .
Power Supply Voltage 10-30Vdc.

45 to 170 mA.
PC Configurable.
Between Input/Output/Power Supply 1500Vac.
EMC Modbus Data Logger
For Industrial environments
Immunity EN 61000-6-2
Emission EN 6100-6-4
Material self-extinguishing
Dimensions W x H x T
4" x4 3/4" x 7/8"
100 x 120x x 22.5 mm
Weight 3 oz 90 g
Operating Temperature -4°F +140°F -20°C +60°C
Storage Temperature -40°F +185°F-40°C +85°C
Humidity (non condensing) 0-90%


Specifications Modbus Data Logger

Analog Input  
Channel 0: mV -100 to 100mV, Volts -100mV to 10V, Current 4-20mA, 0-20mA. RTD Pt100, Pt 1000, Ni100, Ni1000. Resistance 0-2000, Ohm. Potentiometer 20-2000 Ohm. Thermocouple J,K,R,S,B,E,T, N.
Channel 1: mV -100 to 100mV. Volts -100mV to 10V. Current 4-20mA, 0-20mA.
Digital Input 4 Channels.
Threshold 0-3 Volts Off, 10-30V On.
Frequency 300 Hz Maximum.
Channel 1 and 2 Current 4-20mA.
Channel 1 and 2 2 Relays SPDT 2 Amp at 250 V.
RS485: Port 1 Modbus RTU Master, Port 0 Modbus RTU Slave.
RS232: Modbus RTU Slave.
Ethernet: Ethernet 10Base-T, Modbus TCP.
Power Supply: Voltage 10 - 30 Vdc. Reverse polarity protection 60 Vdc.
Current Consumption: 80 mA max.
Temperature rating: Operative Temperature - 4°F +140°F - 20°C +60°C Storage Temperature - 40°F +185°F - 40°C +85°C.
Humidity: (none condensing) 0-90%.
Housing: Material self-extinguishing.
Dimensions: W x L x H 4 x 4 3/4 x 1inch, 100 x 120 x 22.5mm.
Weight: 7 oz 200 g.
EMC. For industrial environments.
Immunity: EN 61000-6-2.
Emission: EN 61000-6-4.
Isolation: 1500Vac, 50Hz, 1 minute.
Configuration: PC Configurable with Ethernet.

Drawings Modbus Data Logger

Input. Channel 0 Channel 1
Thermocouple Positive 9 Negative 10 N/A
mV Positive 9 Negative 10 N/A
RTD and Resistance 2 Wire 8 and 10 N/A
RTD 3 Wire 8 and 10 Compensation 9 N/A
Potentiometer 8 and 10 Wiper 9 N/A
Volts Positive 11 Negative 10 Positive 14 Negative 16
mA Positive 12 Negative 10 N/A
mA Active N/A Positive 15 Negative 16
mA Passive N/A Positive 13 Negative 15
DI0 17 and 18  
DI1 17 and 19  
Output Analog    
Current Positive I Negative H Positive J Negative H
Output Digital    
Relay Common L, NO M, NC N. Common O, NO P, NC Q.
Power Supply (18-30Vdc). Positive E Negative F.  

Modbus Data Logger wiring Diagram.

Applications Modbus Data Logger

  • Modbus Data Logger measuring Registers on a Modbus network.
  • Simple mA Data logging.
  • Thermocouple or RTD Temperature Logging.
  • Reading other Instrumentation on a Modbus Network and scaling the registers to provide 4-20mA output.

Frequently Asked Questions

  • How many Instruments can I connect to the Modbus Data Logger?
    Up to 32 Instruments depending on cable length and other limitations.
  • How many variables can I record to the Modbus Data Logger?
    You can save to the thumb drive 256 registers.
  • What is the fastest period that I can log to the DAT9011USB Modbus Data Logger?
    The fastest time period to log is 10 seconds.
  • Can the DAT9011DL USB work as a Master and slave at the same time?
    Yes all the DAT9000 series master and slaves work independently.
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