Data loggers
DL2
The DL2 is a compact multichannel data logger with a 144 × 72 mm front panel and a 4-inch touchscreen. Its low-profile panel-mount enclosure makes it suitable for control cabinets and machine panels with limited space. It supports up to 12 input/output signals through expansion modules and displays up to 30 channels.
It measures and records temperature, humidity, pressure, flow, level and other process variables. Depending on the configuration, it supports 4–20 mA and 0–10 V signals, RTD sensors including Pt100, thermocouples, HART communication and Modbus RTU Master functionality.
Ethernet (Modbus TCP) and RS-485 (Modbus RTU) communication enable integration with a host system, such as SCADA. The built-in web server provides access to measurement readings via a web browser, while 2 GB of internal memory allows data to be archived.
Compact panel-mount data logger
The DL2 combines measurement, visualisation and data logging in an enclosure with a front panel just 72 mm high. It provides local process monitoring and data storage while taking up little space on a machine or control panel.
- 144 × 72 mm front panel for compact panel mounting.
- Up to 12 input/output signals supported through expansion modules.
- Displays up to 30 channels.
- 4″ colour LCD touchscreen.
- 32 GB internal data memory.
- Front-panel USB port.
- Ethernet port supporting Modbus TCP Client/Server and a built-in web server.
- RS-485 port with Modbus RTU Slave; Master functionality available with an appropriate expansion module.
- Four relay outputs and one 4–20 mA analogue output built into the base module.
- Software for device configuration and data analysis.
DL2 data logger applications
The DL2 is suitable for machinery, small process installations and measurement stations that require data logging within a limited mounting space. Modules selected for the required signal types allow the device to measure temperature and work with transmitters for other physical variables.
In server rooms and technical facilities, the DL2 can monitor temperature at selected points and record equipment status signals, such as fan status. In small heating chambers or dryers, it can track temperature changes and document process conditions. Exceeding configured thresholds can trigger an alarm and an email notification.
In local pumping and water systems, the logger can collect pressure, tank level or flow data. Modbus communication allows readings to be transferred to a host system while retaining local monitoring on the device’s display.
Main functions
- Measurement of process variables, with readings displayed in tables or trend charts.
- Two counters per channel, used, for example, to totalise fluid volume from flow measurements.
- Two alarms or control thresholds per channel.
- Minimum and maximum value tracking.
- Mathematical functions using channel, counter and alarm values.
- A configurable 50-point user-defined characteristic curve.
- Measurement data and event logging.
- Email alarm notifications and periodic reports containing counter values and measurement readings.
- Channel setpoint entry via the touchscreen.
- Communication with a host computer system.
Base module and expansion modules
The DL2 base module provides Ethernet and RS-485 communication, four solid-state relays for alarm or control functions, and one 4–20 mA analogue output for channel value retransmission. The device requires a 24 V DC power supply.
Up to two input/output modules can be added to match the connected sensors, signal types and required functions.
Analogue and temperature inputs
- IN6I(24V) — six 0–20 mA or 4–20 mA analogue inputs with transmitter power supply capability.
- IN6I — six 0–20 mA or 4–20 mA analogue inputs without a transmitter power supply.
- IN6T — six inputs for RTD sensors or thermocouples, also supporting linear resistance and millivolt measurement.
- IN6V — six voltage inputs supporting −10 to +10 V, 0–10 V, 2–10 V, 0–5 V and 1–5 V ranges.
- IN6 — six analogue inputs: inputs 1–3 for RTD sensors, thermocouples, resistance and millivolt measurement; inputs 4–6 for standard current and voltage signals.
- IN4SG — four ±30 mV analogue inputs for strain gauge sensors, with a 5 V DC sensor supply and four digital inputs for taring.
Digital and pulse inputs
- IN6D — six inputs for state monitoring, frequency measurement and pulse counting, with transmitter power supply capability.
- IN3D — three inputs for state monitoring, frequency measurement and pulse counting, with transmitter power supply capability.
Communication modules
- 2RS485(24V) — two independent, isolated RS-485 ports for reading Modbus RTU devices, with transmitter power supply capability.
- 2RS485 — two independent, isolated RS-485 ports for reading Modbus RTU devices.
- 1HRT — a HART port (4–20 mA) with transmitter power supply capability, operating in Primary Master or Secondary Master mode.
Additional outputs and battery power
- OUT6RL — six solid-state relays for alarm and control functions, rated at 24 V / 0.5 A.
- OUT3 — three programmable analogue outputs: 0–20 mA, 4–20 mA, 0–5 V, 1–5 V, 0–10 V or 2–10 V.
- PSBATT — a NiMH battery power module providing backup operation during a power outage or temporary battery-powered operation. Operating time depends on the device configuration.
Data logging and archiving
The DL2 stores readings in 32 GB of internal memory. USB and Ethernet access allow recorded data to be retrieved for further analysis and reporting.
- Configurable logging interval for current readings.
- Automatic switching between logging intervals when an alarm occurs.
- Counter value logging intervals from 1 minute to 24 hours.
- File checksums that allow modifications to recorded data to be detected.
| Front panel | |
| Type of display | LCD TFT 4” 800 px X 480 px
LED backlight |
| Display size | 86.4 mm X 52.5 mm |
| Keyboard | resistive touch panel |
| Additional indication | LED RGB |
| USB Port – front panel | |
| Version | USB 2.0 (with limited functionality, for connection of FLASH storage) |
| Connector type | USB standard ‘A’ type socket |
| Ethernet Port – rear panel | |
| Interface | 10/100 Base-T Ethernet |
| Connector type | RJ-45 |
| Transmission protocol | Server WWW, Modbus TCP Client/Server
ICMP (ping) |
| Modbus TCP Client | |
| Number of connections opened simultaneously | Max 20 |
| Number of read values | Max 30 |
| Modbus TCP Server | |
| Number of connections opened simultaneously | Max 4 |
| RS-485 Serial Port – rear panel | |
| Signals output on terminal block | A(+), B(-) |
| Galvanic separation | None |
| Maximum load | 32 receivers/transmitters |
| Transmission protocol | Modbus RTU Slave |
| Transmission rate | 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbps |
| Parity control | Even, Odd, None |
| Frame | 1 start bit, 8 data bits, 1 stop bit |
| Maximum length of line | 1200 m |
| Internal terminating resistor | Vcc-A(+)-B(-)-G: 390 Ω – 220 Ω – 390 Ω
(activated by DIP-switches) |
| Maximum differntial voltage A(+), B(-) | -7 V .. +12 V |
| Minimum output signal of transmitter | 1.5 V (at RL= 54 W) |
| Minimum sensitivity of receiver | 200 mV / RIN= 12 kW |
| Minimum impedance of data transmission line | 54 W |
| Short-circuit/thermal protection | Yes/Yes |
| Internal data memory | |
| Memory type | Flash |
| Capacity | 32 GB |
| Estimated recording time for recording speed every 5 s for 16 measuring channels | ca. 10 years |
| Supply | |
| Supply voltage | 24 VDC (20 .. 30 VDC) |
| Maximum power consumption | 12 W |
| Security | The internal delay fuse 3.15 A, the exchange only by the service company |
| Electrical connections (terminal connectors) | |
| Type | screw terminal connectors |
| Wire cross section | solid and flexible: 0.14 .. 1.5 mm2
flexible with bootlace ferrule 0.25 .. 1.5 mm2 AWG 30 / 14 |
| Mechanical Dimensions – Housing | |
| Type of housing | panel mount, nonflammable plastic material „Noryl” |
| Dimensions with connectors (w X h w X d) | 144 mm X 72 mm X 127 mm |
| Dimensions of panel cut-out (w X h) | 138+1 mm X 68+0.7 mm |
| Maximum panel thickness | 5 mm |
| Weight | 0.5 kg |
| Protection class | IP30 on front panel side
IP20 on rear panel side |
| Environmental conditions | |
| Ambient temperature | 0 .. +50 °C or 0 .. +40 °C
depends on the device hardware configuration(1) |
| Relative humidity | 5 .. 95% (without steam condensation) |
| Maximum altitude | < 2000 m above sea level |
| Storage temperature | -30 .. +70 °C |
| Degree of pollution | PD2 |
| EMC | EMC Directive 2014/30/EU
EN 61326-1:2013 Table 2 (immunity) EN 61326-1:2013 Class A (emission) |
| RoHS | RoHS Directive 2011/65/EU |
| (1)If module IN6I(24V) or 2RS485(24V) installed and operating as a power supply source for external devices, ambient temperature is limited to 0 .. +40 °C. In all other configurations the ambient temperature range is 0 .. +50 °C. | |
| Analog output 4-20mA | |
| Output signal | 4-20 mA (3.6 .. 22 mA) |
| Current loop supply | no (external supply required) |
| Maximum voltage between I+ and I- | 28 VDC |
| Minimum supply current loop voltage | 9 VDC (RL = 0 Ω) |
| Loop resistance (RL) | 0 .. 500 Ω |
| Galvanic isolation to supply voltage | 250 VAC; 1500 VAC for 1 minute |
| Relay outputs | |
| Number of outputs | 4 |
| Outputs type | Solid state relays |
| Maximum voltage | 60 V AC/DC |
| Maximum load current | 0.1 A |
Compact panel-mount data logger
The DL2 combines measurement, visualisation and data logging in an enclosure with a front panel just 72 mm high. It provides local process monitoring and data storage while taking up little space on a machine or control panel.
- 144 × 72 mm front panel for compact panel mounting.
- Up to 12 input/output signals supported through expansion modules.
- Displays up to 30 channels.
- 4″ colour LCD touchscreen.
- 32 GB internal data memory.
- Front-panel USB port.
- Ethernet port supporting Modbus TCP Client/Server and a built-in web server.
- RS-485 port with Modbus RTU Slave; Master functionality available with an appropriate expansion module.
- Four relay outputs and one 4–20 mA analogue output built into the base module.
- Software for device configuration and data analysis.
DL2 data logger applications
The DL2 is suitable for machinery, small process installations and measurement stations that require data logging within a limited mounting space. Modules selected for the required signal types allow the device to measure temperature and work with transmitters for other physical variables.
In server rooms and technical facilities, the DL2 can monitor temperature at selected points and record equipment status signals, such as fan status. In small heating chambers or dryers, it can track temperature changes and document process conditions. Exceeding configured thresholds can trigger an alarm and an email notification.
In local pumping and water systems, the logger can collect pressure, tank level or flow data. Modbus communication allows readings to be transferred to a host system while retaining local monitoring on the device’s display.
Main functions
- Measurement of process variables, with readings displayed in tables or trend charts.
- Two counters per channel, used, for example, to totalise fluid volume from flow measurements.
- Two alarms or control thresholds per channel.
- Minimum and maximum value tracking.
- Mathematical functions using channel, counter and alarm values.
- A configurable 50-point user-defined characteristic curve.
- Measurement data and event logging.
- Email alarm notifications and periodic reports containing counter values and measurement readings.
- Channel setpoint entry via the touchscreen.
- Communication with a host computer system.
Base module and expansion modules
The DL2 base module provides Ethernet and RS-485 communication, four solid-state relays for alarm or control functions, and one 4–20 mA analogue output for channel value retransmission. The device requires a 24 V DC power supply.
Up to two input/output modules can be added to match the connected sensors, signal types and required functions.
Analogue and temperature inputs
- IN6I(24V) — six 0–20 mA or 4–20 mA analogue inputs with transmitter power supply capability.
- IN6I — six 0–20 mA or 4–20 mA analogue inputs without a transmitter power supply.
- IN6T — six inputs for RTD sensors or thermocouples, also supporting linear resistance and millivolt measurement.
- IN6V — six voltage inputs supporting −10 to +10 V, 0–10 V, 2–10 V, 0–5 V and 1–5 V ranges.
- IN6 — six analogue inputs: inputs 1–3 for RTD sensors, thermocouples, resistance and millivolt measurement; inputs 4–6 for standard current and voltage signals.
- IN4SG — four ±30 mV analogue inputs for strain gauge sensors, with a 5 V DC sensor supply and four digital inputs for taring.
Digital and pulse inputs
- IN6D — six inputs for state monitoring, frequency measurement and pulse counting, with transmitter power supply capability.
- IN3D — three inputs for state monitoring, frequency measurement and pulse counting, with transmitter power supply capability.
Communication modules
- 2RS485(24V) — two independent, isolated RS-485 ports for reading Modbus RTU devices, with transmitter power supply capability.
- 2RS485 — two independent, isolated RS-485 ports for reading Modbus RTU devices.
- 1HRT — a HART port (4–20 mA) with transmitter power supply capability, operating in Primary Master or Secondary Master mode.
Additional outputs and battery power
- OUT6RL — six solid-state relays for alarm and control functions, rated at 24 V / 0.5 A.
- OUT3 — three programmable analogue outputs: 0–20 mA, 4–20 mA, 0–5 V, 1–5 V, 0–10 V or 2–10 V.
- PSBATT — a NiMH battery power module providing backup operation during a power outage or temporary battery-powered operation. Operating time depends on the device configuration.
Data logging and archiving
The DL2 stores readings in 32 GB of internal memory. USB and Ethernet access allow recorded data to be retrieved for further analysis and reporting.
- Configurable logging interval for current readings.
- Automatic switching between logging intervals when an alarm occurs.
- Counter value logging intervals from 1 minute to 24 hours.
- File checksums that allow modifications to recorded data to be detected.
| Front panel | |
| Type of display | LCD TFT 4” 800 px X 480 px
LED backlight |
| Display size | 86.4 mm X 52.5 mm |
| Keyboard | resistive touch panel |
| Additional indication | LED RGB |
| USB Port – front panel | |
| Version | USB 2.0 (with limited functionality, for connection of FLASH storage) |
| Connector type | USB standard ‘A’ type socket |
| Ethernet Port – rear panel | |
| Interface | 10/100 Base-T Ethernet |
| Connector type | RJ-45 |
| Transmission protocol | Server WWW, Modbus TCP Client/Server
ICMP (ping) |
| Modbus TCP Client | |
| Number of connections opened simultaneously | Max 20 |
| Number of read values | Max 30 |
| Modbus TCP Server | |
| Number of connections opened simultaneously | Max 4 |
| RS-485 Serial Port – rear panel | |
| Signals output on terminal block | A(+), B(-) |
| Galvanic separation | None |
| Maximum load | 32 receivers/transmitters |
| Transmission protocol | Modbus RTU Slave |
| Transmission rate | 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbps |
| Parity control | Even, Odd, None |
| Frame | 1 start bit, 8 data bits, 1 stop bit |
| Maximum length of line | 1200 m |
| Internal terminating resistor | Vcc-A(+)-B(-)-G: 390 Ω – 220 Ω – 390 Ω
(activated by DIP-switches) |
| Maximum differntial voltage A(+), B(-) | -7 V .. +12 V |
| Minimum output signal of transmitter | 1.5 V (at RL= 54 W) |
| Minimum sensitivity of receiver | 200 mV / RIN= 12 kW |
| Minimum impedance of data transmission line | 54 W |
| Short-circuit/thermal protection | Yes/Yes |
| Internal data memory | |
| Memory type | Flash |
| Capacity | 32 GB |
| Estimated recording time for recording speed every 5 s for 16 measuring channels | ca. 10 years |
| Supply | |
| Supply voltage | 24 VDC (20 .. 30 VDC) |
| Maximum power consumption | 12 W |
| Security | The internal delay fuse 3.15 A, the exchange only by the service company |
| Electrical connections (terminal connectors) | |
| Type | screw terminal connectors |
| Wire cross section | solid and flexible: 0.14 .. 1.5 mm2
flexible with bootlace ferrule 0.25 .. 1.5 mm2 AWG 30 / 14 |
| Mechanical Dimensions – Housing | |
| Type of housing | panel mount, nonflammable plastic material „Noryl” |
| Dimensions with connectors (w X h w X d) | 144 mm X 72 mm X 127 mm |
| Dimensions of panel cut-out (w X h) | 138+1 mm X 68+0.7 mm |
| Maximum panel thickness | 5 mm |
| Weight | 0.5 kg |
| Protection class | IP30 on front panel side
IP20 on rear panel side |
| Environmental conditions | |
| Ambient temperature | 0 .. +50 °C or 0 .. +40 °C
depends on the device hardware configuration(1) |
| Relative humidity | 5 .. 95% (without steam condensation) |
| Maximum altitude | < 2000 m above sea level |
| Storage temperature | -30 .. +70 °C |
| Degree of pollution | PD2 |
| EMC | EMC Directive 2014/30/EU
EN 61326-1:2013 Table 2 (immunity) EN 61326-1:2013 Class A (emission) |
| RoHS | RoHS Directive 2011/65/EU |
| (1)If module IN6I(24V) or 2RS485(24V) installed and operating as a power supply source for external devices, ambient temperature is limited to 0 .. +40 °C. In all other configurations the ambient temperature range is 0 .. +50 °C. | |
| Analog output 4-20mA | |
| Output signal | 4-20 mA (3.6 .. 22 mA) |
| Current loop supply | no (external supply required) |
| Maximum voltage between I+ and I- | 28 VDC |
| Minimum supply current loop voltage | 9 VDC (RL = 0 Ω) |
| Loop resistance (RL) | 0 .. 500 Ω |
| Galvanic isolation to supply voltage | 250 VAC; 1500 VAC for 1 minute |
| Relay outputs | |
| Number of outputs | 4 |
| Outputs type | Solid state relays |
| Maximum voltage | 60 V AC/DC |
| Maximum load current | 0.1 A |